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Transmitter controlled by signal feedback from receiver

Subclass of:

455 - Telecommunications

455039000 - TRANSMITTER AND RECEIVER AT SEPARATE STATIONS

455068000 - With control signal

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DocumentTitleDate
20110177788WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - Provided is a wireless communication apparatus, which enhances communication characteristics of feedback MIMO by switching transmission weight selection processing based on a channel state to select a suitable transmission weight with a small calculation load. A wireless communication apparatus has a plurality of antennas, and includes a reception unit for receiving signals of channels included in a predetermined frequency band from another wireless communication apparatus and for obtaining channel state information of the channels, a determination unit for determining a variation in the channel state information, a channel state information calculation unit for calculating an average value of all of the channel state information included in the predetermined frequency band as representative channel state information of the predetermined frequency band overall if there is no variation in the channel state information, a transmission weight selection unit for selecting a transmission weight based on the representative channel state information calculated, and a transmission unit for transmitting identification information of the transmission weight to the another wireless communication apparatus.07-21-2011
20100075613System and Method for Link Rate Negotiation - A system and method are provided for negotiating a link data rate in a communication system using a plurality of data rates. In a system including a first device network-connected to a second device, auto-negotiation (AN) messages are mutually transmitted. The AN messages indicate rate information such as preferred data rate capabilities, if the device has a dual-rate capability, or a single data rate capabilities. If the AN messages are mutually transmitted, a negotiated link data rate is established. However, if one of the devices cannot send AN messages, the other device times-out, and a link data rate is established at the data rate transmitted by the device that is not AN-capable.03-25-2010
20130040580METHOD FOR SINGLE STREAM BEAMFORMING WITH MIXED POWER CONSTRAINTS - System and method for calculating a transmitter beamforming vector related to a channel vector h under per-antenna power constraints combined with total power constraint, under per-antenna power constraints combined with overall line of site (LOS) effective isotropic radiated power (EIRP) and under all three constraints. Calculating a transmitter beamforming vector may be done in the transmitter, in the receiver and feedback to the transmitter or in both. The method may be adapted to perform with a multi-antenna receiver and with multi-carrier systems.02-14-2013
20130040579CONTACT VERIFICATION SIGNALING - Certain aspects of the present disclosure provide techniques and apparatus for verification signaling, for example, in wireless communications in a television white space (TVWS) network.02-14-2013
20100041344Method for transmitting channel quality indicators - A method for transmitting Channel Quality Indicators (CQIs) of all carrier bands in a system using a plurality of carrier bands (legacy system bands) is disclosed. In order to provide sufficient information to a scheduler, the CQIs of all the carrier bands are generated and transmitted by the same method or a predetermined number of carrier bands are selected and only the CQIs of the selected carrier bands are transmitted. Thus, it is possible to efficiently control signal resources. By simply expanding the method for transmitting the CQIs of the carrier bands, it is possible to facilitate the expansion of the system.02-18-2010
20090124211INFORMATION PROCESSING APPARATUS AND COMMUNICATION APPARATUS - The present invention relates to an information processing apparatus and a communication apparatus for accurately recognizing at the base station the current receiving quality of the mobile terminals for improving the throughput of the base station. A mobile terminal 05-14-2009
20090124210RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - A radio transmitting apparatus, a radio receiving apparatus, a wireless communication method and a wireless communication system wherein even when a channel correlation is large, the channel capacity and the feedback amount can be improved. In ST05-14-2009
20130090070METHOD AND DEVICE FOR THE OPTIMIZED TRANSMISSION OF REMOTE CONTROL SIGNALS PARTICULARLY OF GATES, DOORS AND BARRIERS - The present invention refers to a method and to a device for the optimized transmission of remote control signals particularly but not exclusively used to open or close gates, doors and automatic barriers, in which the method (04-11-2013
20090093218TRANSMISSION RATE CONTROL METHOD, MOBILE STATION AND RADIO BASE STATION - In the conventional mobile communication system using an “Enhanced Uplink, the present invention improves a radio quality by preventing a decrease in a transmission rate of uplink user data, the decrease unintended by the radio base station Node B and caused by a false detection of a “Down” command in an RGCH.” A transmission rate control method according to the present invention includes: transmitting, from a radio base station to a mobile station, a relative transmission rate control channel for instructing to decrease the transmission rate of the uplink user data, only when the uplink user data transmitted from the mobile station has been successfully received.04-09-2009
20110059701RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD IN COMMUNICATION SYSTEM - A radio communication apparatus includes: a receiving unit configured to receive a cognitive signal including system information of each of a plurality of systems; a metric unit configured to prepare metric information indicating relationship degree between the radio communication apparatus and a communication system to which the radio communication apparatus does not belong; a condition determination unit configured to determine whether a restriction should be imposed on transmission by the radio communication apparatus based on the system information and the metric information; and a transmission unit configured to transmit a signal using predetermined radio resources when transmission by the radio communication apparatus is not prohibited.03-10-2011
20090253381Method and System For Greedy User Group Selection With Range Reduction for FDD Multiuser MIMO Downlink Transmission With Finite-Rate Channel State Information Feedback - Aspects of a greedy search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise receiving feedback information via a communication channel for a plurality of users in a frequency division duplex system. The system capacity may be maximized using the feedback information based on a signal from a single user within a reduced search range or based on the signal from the single user and at least one other signal from another user within a remaining portion of the search range. The feedback information may comprise quantized gain and/or direction of the channel state information of the users.10-08-2009
20090233560METHOD FOR TRANSMITTING DATA IN MULTIPLE ANTENNA SYSTEM - A method for transmitting data in a multi-antenna system includes determining a candidate mode in which a maximum upperbound approximation of an average total data rate is maximized as a transmission mode, selecting a user equipment to receive data by using the transmission mode, and transmitting data to the selected user equipment.09-17-2009
20090233559Method and Arrangement for Reducing Feedback Data in a Mimo Communication System - The present invention relates to a method and arrangement for reducing feedback data in a communication system, said communication system comprising a number of transmitter antennas, n09-17-2009
20100099363CLOSED LOOP TRANSMITTER IQ CALIBRATION - A novel and useful apparatus for and method of closed loop IQ calibration for use in a transmitter. The IQ calibration mechanism functions to provide calibration of IQ imbalance in the presence of real world RF impairments. An iterative process is used to update the gain and phase mismatch values whereby the metrics are calculated in a differential manner without the need for calculation absolute imbalance values. At each iteration, updating the gain and phase mismatch estimate requires only the direction of the correction to be determined. The direction of the correction is calculated using only the differences between output power measurements. The updated gain and phase mismatch estimates are used to update an IQ correction matrix. This process is repeated until a desired stopping criterion is reached. Gear shifting is used to ensure quick convergence of the algorithm while providing the ability to achieve any desired level of accuracy.04-22-2010
20100267346METHODS AND APPARATUS FOR CONTROL SIGNALING IN A COMMUNICATION SYSTEM - Methods and apparatus for control signaling in a communication system using continuous valued measurement and feedback are disclosed. The control signaling utilizes delta-sigma modulation where a measured phase or amplitude of a received signal is used to determine a difference signal by subtracting a previously quantized integrated difference signal from the current measurement signal, and then integrating the difference signal. The integrated difference signal is quantized and transmitted to the device originating the received signal as feedback control signaling. The device originating the received signal may then filter the control signaling to obtain the desired control information used to adjust or control the transmission of the signal transmitted by the device. By utilizing delta-sigma modulation, a greater degree of control signaling precision is achieved when controlling variables such as phase or amplitude of the transmitted signals, thereby achieving improved communication system performance.10-21-2010
20100035559COMMUNICATION APPARATUS AND COMMUNICATION SYSTEM - Remote control data is securely transmitted to a device under control. A remote control device transmits an acknowledge request for A ch to the device under control (S02-11-2010
20090191820SIGNAL VALUE HOLDING APPARATUS, SIGNAL VALUE HOLDING METHOD, SIGNAL VALUE CONTROL SYSTEM, SIGNAL VALUE CONTROL METHOD, PLAYBACK APPARATUS, AND PLAYBACK METHOD - A signal apparatus is provided. The signal value holding apparatus including a determining section to determine a magnitude relationship between a signal value of an input signal and a signal value of a prescribed feedback signal, a first holding section to hold the signal value determined to be larger by the determining section, a subtracting section to subtract a prescribed value from the signal value held by the first holding section and output a result as the feedback signal, and a second holding section to receive the signal value held by the first holding section and hold the signal value supplied from the first holding section when the signal value of the input signal becomes smaller than the signal value of the feedback signal based on a determination result of the magnitude relationship between the signal values by the determining section.07-30-2009
20090017769EFFICIENT RANK AND PRECODING MATRIX FEEDBACK FOR MIMO SYSTEMS - The present disclosure provides a receiver, a transmitter and methods of operating a receiver or a transmitter. In one embodiment, the receiver includes a receive unit configured to receive transmissions from multiple antennas. The receiver also includes a rank feedback unit configured to feed back a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme. The receiver further includes a preceding feedback unit configured to feed back a preceding matrix selection, wherein the preceding matrix selection corresponds to a preceding matrix feedback reduction scheme.01-15-2009
20090149134POWER CONTROL FOR A RADIO TRANSCEIVER THAT USES INTERFERENCE CANCELLATION - A signal power associated with a signal received in a current time period is determined. The determined signal power is combined with a predicted effective interference to form a predicted signal-to-interference indicator. The predicted signal-to-interference indicator is compared to a target signal-to-interference indicator. One or more transmit power control commands are generated based on the comparison. In one example embodiment, the predicted effective interference is based on an effective interference estimated for a previous time period. In another example embodiment, the predicted effective interference is based on interference contributions estimated in a current time period and a predicted interference cancellation efficiency. The predicted interference cancellation efficiency is based on the estimated interference cancellation efficiency for a previous time period. The technology is particularly useful in receivers that use interference cancellation and achieves excellent transmit power control performance both in terms of accuracy and speed.06-11-2009
20100124887SYSTEM AND METHOD FOR LINK ADAPTATION FOR VARIABLE LINK CONDITIONS - Systems, apparatus, methods, and manufactures for performing link adaptation in a communications system are described. The methods may employ an error rate table that has a channel condition value dimension and a transmission parameter dimension. The elements of the error rate table include expected error rates for data transmitted at various channel conditions according to various transmission parameters. Also, the various transmission parameters may each be associated with a data transmission rate. For a given channel condition value, the methods may determine expected throughputs for each of the transmission parameters according to the associated expected error rates and data transmission rates. A transmission parameter may be selected according to the expected throughputs.05-20-2010
20090088083BASE STATION, RECEIVING DEVICE, MOBILE TERMINAL, AND FREQUENCY SHARING METHOD - A disclosed base station is used in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, and includes a propagation loss estimation unit configured to estimate propagation loss of a signal in the first frequency band when the signal arrives at a receiving device of the second wireless communication system; a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band; a maximum transmission power determining unit configured to determine maximum transmission power based on the estimated propagation loss and the calculated frequency difference; and a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit.04-02-2009
20100099364System and Method for Transmitting and Error Handling Control Feedback Information - A system and method for transmitting and error handling control feedback information is provided. A method for error handling in a transmission of control feedback information over a communications link by a first station includes determining a first feedback information at the first station, transmitting the first feedback information at a first instance to a second station, and receiving a scheduling message from the second station. The scheduling message includes a second feedback information, and the second feedback information is based on the first feedback information. The method also includes determining if the first feedback information at the first instance was received correctly by the second station based on the scheduling message, and in response to determining that the first feedback information at the first instance was not received correctly by the second station, transmitting the first feedback information at a second instance to the second station.04-22-2010
20090275292System and Method for Wireless Communications - System and method for enabling the cohabitation of licensed and unlicensed communications devices. A method comprises receiving a transmission permission request from a secondary device during a first transmission slot of a first communications period, decoding the transmission permission request, responding to the transmission permission request in a second transmission slot in response to a determining that a decision on the transmission permission request has been made, and receiving a transmission in a second communications period. The transmission permission request comprises a codeword generated by concatenating two sequences shorter in length than the codeword.11-05-2009
20080293366Transmit Power Control in a Random Access Scheme - A method and control device for generating a transmit power level for a communication apparatus for operation in a wireless communication network having a network node. The control device comprises a controller adapted to generate a request message for requesting access to a communication channel, to be transmitted to the network node. The control device is also adapted to determine whether access to the communication channel has been granted in response to the request message. A transmit power control unit is adapted to generate a transmit power level for the communication apparatus in dependence of whether access to the communication channel has been granted.11-27-2008
20080311858Diversity transmission using a single power amplifier - Diversity radio transmission is accomplished with excellent performance using multiple antennas receiving a transmission signal from a single power amplifier. A data signal to be transmitted is provided to a first antenna, and a phase-shifted version of the data signal is applied a second antenna. The relative phase shift between the data signal transmitted over the two transmit antennas ensures the two antenna signals can be constructively combined at the receiver. In one non-limiting example embodiment, the relative phase shift is determined by processing pilot signals sent along with the data signal and which are transmitted with predetermined phase shifts.12-18-2008
20080248758Data Transmission And Retransmission - A method transmits data. The method includes transmitting a series of data unit, receiving a retransmission request indicating a plurality of corrupt data units in the transmitted data units which were not received correctly, and retransmitting the corrupted data units.10-09-2008
20110207416RADIO APPARATUS, AND METHOD AND PROGRAM FOR CONTROLLING SPATIAL PATH - A PDMA terminal establishes communication by forming a plurality of spatial paths to another single radio apparatus. A plurality of antennas constituting an array antenna are divided into a plurality of subarrays corresponding to the plurality of spatial paths respectively. An adaptive array processing unit can perform an adaptive array processing for each of the plurality of subarrays. A memory stores in advance information on the number of antennas associated with the number of spatial paths that can be formed by the array antenna. A control unit controls a processing to transmit possible multiplicity information to another radio apparatus at a prescribed timing.08-25-2011
20090093219WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION SYSTEM - A wireless communication technique capable of maintaining excellent communication quality. A wireless communication system includes base station equipment. The base station equipment is capable of performing wireless communication with a plurality of mobile units. The base station equipment detects the mobile units which are not synchronized with the base station equipment. Then, the base station equipment limits the transmission power to the mobile units detected.04-09-2009
20090081958METHOD AND SYSTEM FOR BROADCAST MESSAGE RATE ADAPTATION IN MOBILE SYSTEMS - A method and system for setting transmission rate of messages transmitted and received by a mobile unit. The method and system include monitoring the speed of the mobile unit; and adjusting the transmission rate based on the speed of the mobile unit. Prevailing conditions may also be determined and the transmission rate may be further adjusted based on the prevailing conditions. The prevailing conditions may be determined based on at least one of states of one or more sensors local to the mobile unit and information provided from an external source over a communication system. The prevailing conditions may include at least one of slick pavement, limited visibility, road construction, object in roadway, accident, dense traffic, and anomalous driving behavior.03-26-2009
20090203324RADIO COMMUNICATION SYSTEM, INTERLEAVE PATTERN CONTROL DEVICE, AND INTERLEAVE PATTERN CONTROL METHOD - Disclosed is an interleave pattern control device which can reduce a reception error percentage when an interleave pattern of a repetition symbol is controlled. In an interleave selecting unit (08-13-2009
20090203326DIGITAL BROADCAST RECEIVER CAPACITY SIGNALLING METADATA - Embodiments are directed to transmitting receiver-capacity-signalling data that specifies a plurality of receiver capacities to be used for receiving a service. The signalled receiver capacities may include: a type of time interleaver being used and a minimum burst interval between two consequent bursts. The signaled receiver capacities may also specify: how often a physical layer pipe appears in frames, and/or a number of a frame in which a physical layer pipe appears for a first time during a super frame. Embodiments are directed to receiving the receiver-capacity-signalling data and if, based on the received receiver-capacity-signalling data, receiver capacity is sufficient for one or more selected services, performing service discovery and decoding the one or more services. Otherwise, decoding the one or more services may not be performed.08-13-2009
20090215403Signal processing under attenuated transmission conditions - Signal processing under attenuated transmission conditions. Within an orthogonal signal space, the number of orthogonal signals that are used to transmit information from a transmitter to a receiver is reduced and the transmitted power of each of the now remaining orthogonal signals is modified; this may involve increasing the power of all of the remaining orthogonal signals equally or alternatively modifying them individually. The same modulation used before the reduction may also be used afterwards; within communication systems having multiple transmitter-receiver paths, this will ensure that the communication system's throughput and efficiency will remain unchanged even when one (or more) transmitter-receiver paths are highly attenuated. In addition, robust mode operation is provided for ranging and registering of transmitter devices when entering the communication system. In addition, the unused orthogonal signals may be employed to support interference cancellation of those orthogonal signals that are used to transmit information.08-27-2009
20090221241SYSTEM, APPARATUS, AND METHOD FOR ASYMMETRICAL BEAMFORMING WITH EQUAL-POWER TRANSMISSIONS - The present invention provides a plurality of embodiments for beamforming in an asymmetrical system wireless communication system (09-03-2009
20090215402POWER USAGE MANAGEMENT OF WIRELESS INPUT DEVICES - Input devices such as computer mice are commonly used for interacting with personal computers (PCs). Increasingly, wireless computer mice are becoming popular with users due to their ability to provide cordless accessibility for interaction with the PCs. The wireless computer mice are usually powered using batteries and uses radio frequencies (RF) for transmitting the users' input to the PCs. The wireless computer mice usually have a fixed transmission power, thus resulting in a fixed transmission range. Notably, the battery life and transmission range of the wireless mice share an inversely proportional relationship. Hence, a long battery life cannot be obtained without decreasing the transmission range and vice versa. However, existing wireless computer mice typically do not have provisions for making such adjustments. An embodiment of the invention describes an apparatus and a method for managing power usage of wireless input devices.08-27-2009
20090239479RADIO APPARATUS, AND METHOD AND PROGRAM FOR CONTROLLING SPATIAL PATH - A PDMA terminal establishes communication by forming a plurality of spatial paths to another single radio apparatus. A plurality of antennas constituting an array antenna are divided into a plurality of subarrays corresponding to the plurality of spatial paths respectively. An adaptive array processing unit can perform an adaptive array processing for each of the plurality of subarrays. A memory stores in advance information on the number of antennas associated with the number of spatial paths that can be formed by the array antenna. A control unit controls a processing to transmit possible multiplicity information to another radio apparatus at a prescribed timing.09-24-2009
20080318531METHOD FOR CONTROLLING ALLOCATING RESOURCES IN A MOBILE RADIO COMMUNICATION NETWORK, CORRESPONDING TRANSMITTER AND RECEIVER - The present invention relates to a method for allocating resources to a transmitter adapted to send data over a radio link, the data being transmitted in physical resource blocks allocated by a resource allocation mechanism, said physical resource block being defined by its frequency extension and its time extension, an automatic repeat request protocol being used for signalling erroneously and/or correctly received data through a feedback message.12-25-2008
20120142280LOW COST, ACTIVE ANTENNA ARRAYS - A transmitter system including: a bidirectional signaling (BDS) network having first and second networks for carrying first and second carrier signals, and having a set of n phase synchronous location pairs (a06-07-2012
20100151795METHOD OF TRANSMITTING FEEDBACK INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting feedback information in a multiple antenna system is provided. The method includes selecting at least one subband selected from a plurality of subbands according to subband preset information, the subband preset information being a preset on data processing settled for each of the plurality of subbands, and transmitting a subband index of the selected subband. Only a subband index is fed back instead of separately transmitting a precoder index or a modulation and coding scheme (MCS) level index to each UE, thereby reducing feedback overhead.06-17-2010
20090047912METHOD OF TRANSMITTING FEEDBACK INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting feedback information at a user equipment (UE) in a wireless communication system comprising a network and a plurality of UEs is disclosed, the method comprising receiving information associated with a time-frequency region for transmitting feedback information related with downlink data, the time-frequency region being dynamically allocated by the network, receiving the downlink data from the network, and transmitting the feedback information for the downlink data to the network on the time-frequency region.02-19-2009
20090117854METHOD AND SYSTEM FOR AUTOMATIC UPLINK POWER CONTROL IN WIRELESS COMMUNICATION - Automatic control of transmitted power of a transmitted signal at a local transmitter in response to intermittent signal quality reports from a remote receiver about a received communication signal originating as the transmitted communication signal is provided by distinguishing between improving link conditions and degrading link conditions and at least derating a scheduled signal power change if there are changes in the signal quality reports, such as if the power change is scheduled to occur too soon after a previous signal power change. A fast attack power increase and slow decay power decrease may also be employed. The method is designed to maintain signal quality (e.g. distant Es/No) in the presence of these variations and uncertainties, for time-varying link conditions that have a fade rate range from less than 0.01 dB/s to more than 1 dB/s.05-07-2009
20110059702METHOD, APPARATUS AND COMPUTER PROGRAM PRODUCT FOR PROVIDING A FIREWALL FOR A SOFTWARE DEFINED MULTIRADIO - An apparatus for providing management of radio operation in a multiradio environment may include a processor. The processor may be configured to receive a communication in accordance with a protocol associated with a particular radio access technology in which the communication is associated with accessing a hardware resource for radio communication, determine whether the received communication complies with instructions defining parameters associated with providing shared access to hardware resources among a plurality of protocols associated with respective different radio access technologies, and respond to the received communication based on a result of the determining.03-10-2011
20110059700ADAPTIVE TRANSMISSION AND RECEIVING METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE ANTENNAS - Disclosed is an adaptive transmit and receive method and device in a multiple-antenna wireless communication system. A transmit mode comprises different main transmit modes each of which includes one or both of a sub-transmit mode based on STBC and a sub-transmit mode based on SM. A receiver calculates an STBC performance parameter and a SM performance parameter, and a transmitter uses the parameters to determine a main transmit mode with maximum data rates and select a sub-transmit mode for minimizing power consumption. The transmitter channel-encodes, modulates and antenna-maps input data according to the selected transmit mode, and outputs results to the receiver. The receiver antenna/symbol-demodulates and channel-decodes the received data.03-10-2011
20110059699RATE SELECTION FOR A QUASI-ORTHOGONAL COMMUNICATION SYSTEM - A selected rate is received for an apparatus based on a hypothesized signal-to-noise-and-interference ratio (SINR) for the apparatus, and characterized statistics of noise and interference observed at a receiver for the apparatus. Data are processed in accordance with the rate selected for the apparatus.03-10-2011
20100159844Radio Communication Device and Radio Communication Method - A radio communication device according to the present invention is a radio communication device which adaptively controls directivity of transmission radio signals by use of a plurality of element antennas on the basis of received radio signals received from a counterpart radio communication device that is a communication target radio communication device, the transmission radio signals being to be transmitted to the counterpart radio communication device, the radio communication device comprising: a propagation path state detector configured to detect a fluctuation state of a propagation path to the counterpart radio communication device on the basis of the received radio signal; and a transmission controller configured to control a phase of the transmission radio signal on the basis of the fluctuation state of the propagation path detected by the propagation path state detector.06-24-2010
20100197242TECHNIQUES FOR EXPLICIT FEEDBACK DELAY MEASUREMENT - Techniques for explicit feedback delay measurement are described. An apparatus may comprise a processor to generate a steering matrix for transmit spatial processing over a channel, determine a delay time associated with explicit feedback information for the channel, and determine whether to modify the steering matrix with the explicit feedback information based on the delay time. Other embodiments are described and claimed.08-05-2010
20090203325SELECTIVELY SKIPPING LISTEN WINDOWS IN POWER SAVING MODE IN MULTI-MODE RADIO HANDSETS - Disclosed is a method of selectively skipping one or more listen windows during power saving (i.e., sleep mode) operation in a multi-mode radio handset capable of operating on a plurality of radio access networks (RANs). A multi-mode radio handset signals a base station to which it is currently in communication to request that one or more listen windows be skipped considering the delay and jitter requirements of the most time critical application currently running. The request includes data defining a different listen and sleep window sequence. The multi-mode radio handset receives an acknowledgment from the base station indicating that the request has been granted. The acknowledgement includes a start frame parameter that defines when the different listen and sleep window sequence will begin. Upon completion of the different listen and sleep window sequence, the multi-mode radio handset reverts back to the original alternating sequence of listen and sleep windows.08-13-2009
20080287069Wireless Communication Apparatus, Program, Wireless Communication Method and Wireless Communication System - A wireless communication apparatus includes a transmitting portion to transmit a data signal to other wireless communication apparatus, a receiving portion to receive a reception confirmation signal indicating reception of the data signal by the other wireless communication apparatus from the other wireless communication apparatus during a specified period, a determination portion to determine that a predetermined requirement is satisfied if the receiving portion receives a given signal during the specified period, and a control portion to control the transmitting portion to request the other wireless communication apparatus to retransmit the reception confirmation signal if the receiving portion does not normally receive the reception confirmation signal and the determination portion determines that the predetermined requirement is satisfied.11-20-2008
20100297950CIRCUIT AND METHOD FOR OPERATING A CIRCUIT OF A NODE OF A RADIO NETWORK - A circuit and a method for operating the circuit of a node of a radio network, wherein a frame, which requires an acknowledgement of the reception, is received by the circuit. A receive power and/or a signal quality of the frame is determined by the circuit. A transmit power for the acknowledgement is adjusted by the circuit based on the determined receive power of the associated frame and/or the determined signal quality of the associated frame, and the acknowledgement is sent with the adjusted transmit power.11-25-2010
20100304691Method And Arrangements For Signaling Control Information In A Communication System - The invention relates to devices and methods for signalling control information associated with transmission of data over a wireless channel. A second communication device receives (S12-02-2010
20090068960Performance Measuring System, Data Transmission Method and Computer Program - A portable user-specific performance measuring system comprises a quality unit which receives a measurement signal and measures the quality of the measurement signal, and a presentation unit which receives from the quality unit quality data indicating the quality of the measurement signal and presents the quality of the measurement signal on the basis of the quality data.03-12-2009
20100227567COMMUNICATION OPERATING MODE SELECTION BASED ON MULTI-PATH SIGNAL POWER MEASUREMENT - A method for communication operating mode selection is presented. In the method, each of a plurality of communication signals is transmitted by way of a separate one of a first plurality of antennas according to a first operating mode. The transmitted communication signals are received by way of a second plurality of antennas. A multi-path power metric of the received communication signals is generated. Based on the multi-path power metric, each of the plurality of communication signals is transmitted by way of the first plurality of antennas according to a second operating mode instead of the first operating mode.09-09-2010
20100056067APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING FAST FEEDBACK INFORMATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for operating a fast feedback channel in a broadband wireless communication system are provided. The method includes generating and transmitting a feedback signal through a fast feedback channel of a first mode, determining to switch a mode of the fast feedback channel from the first mode to a second mode, transmitting a signal for requesting the mode switching of the fast feedback channel through the fast feedback channel, and generating and transmitting a feedback signal through a fast feedback channel of the second mode.03-04-2010
20100015927RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - Disclosed are a radio communication device and a radio communication method capable of suppressing fluctuations of interference given to an adjacent cell while maintaining a beam gain to a UE of a local cell even when a transmission beam is switched. According to the device and the method, ST01-21-2010
20090036062Radio Device - A data rate is to be determined depending on circumstances. A control unit (02-05-2009
20120202435METHOD AND APPARATUS FOR CONTROLLING WIRELESS POWER TRANSMISSION AND RECEPTION, AND WIRELESS POWER TRANSMISSION SYSTEM - Provided are a transmission system and a wireless power transmission and reception controlling method. According to an embodiment, a wireless power receiver may include: a target communication unit configured to receive, from a wireless power transmitter, a wake-up request signal and synchronization information with respect to wireless power transmission, and to transmit a response signal with respect to the wake-up request signal to the wireless power transmitter; a load path switch configured to activate based on timing information included in the synchronization information; and a target resonator configured to receive wireless power from a source resonator of the wireless power transmitter, when the load path switch is activated.08-09-2012
20110014876RADIO COMMUNICATION METHOD AND SYSTEM - The first communication apparatus transmits existence confirmation request notices to the second communication apparatus, using the first frequency band and the second frequency band that is a frequency band different from the first frequency band. The second communication apparatus returns existence confirmation response notices as a response to the correctly received existence confirmation request notices of the first frequency band and the second frequency band, to the first communication apparatus, using the frequency bands corresponding to the first frequency band and the second frequency band. The first communication apparatus, after having received one or more of the existence confirmation response notices transmitted from the second communication apparatus, exchanges data with the second communication apparatus, using the frequency band that corresponds to the existence confirmation response notice transmitted through the higher frequency band among the first and second frequency bands.01-20-2011
20100304690METHOD OF PASSIVELY DETECTING AN APPROACH TO A VEHICLE - A method for activating vehicle features when approaching a vehicle includes receiving (12-02-2010
20090247089MULTICAST COMMUNICATION SYSTEM WITH POWER CONTROL - A method for delivering multicast communications over an IEEE 802.11 compliant network is provided. The method comprises transmitting a data stream to a plurality of receivers from a transmitter over respective network links as a multicast communication, selecting a receiver from the plurality of receivers; receiving a feedback signal from the selected receiver at a selected point in time; and adjusting transmission of the data stream in dependence upon the received feedback signal.10-01-2009
20090239478Power regulation feedback to optimize robustness of wireless transmissions - A wireless communication system with power regulation feedback for improving the robustness of wireless communication transmissions between a receiver and an active emitter irrespective of the distance separation therebetween. The receiver receives wireless communications and detects a voltage induced therein. A feedback loop provides wireless transmission of power regulation feedback based on the detected voltage. The active emitter generates a power regulated data signal in which at least one of maximum and minimum bit voltage levels of respective logical high and low bits is adjusted based on the induced voltage received via the feedback loop. The RF power level, modulation index, and/or slew rate of a data signal emitted from the active emitter is regulated by adjusting at least one of maximum and minimum bit voltage levels of respective logical high and low bits based on voltage induced in the receiver during a previous communication from the active emitter.09-24-2009
20090029652ADJUSTING POWER CONSUMPTION OF MOBILE COMMUNICATION DEVICES BASED ON RECEIVED SIGNAL QUALITY - To make more efficient use of power resources, a mobile device adjusts the power necessary for receiving and/or transmitting data in response to signal quality. As the quality of received signals change, the device alters the power used to transmit and/or receive signals. When signal quality is poor, more power is used to receive the signal to maintain device functionality. When signal quality is strong, less power can be used while still maintaining device performance. This preserves device functionality while allowing the device to conserve power when possible.01-29-2009
20090029653METHOD AND STATION FOR TRANSMITTING DATA IN A RADIO COMMUNICATION SYSTEM - In a communication system, a first transmitting station transmits a transmission signal to a first receiving station for transmitting a sequence of data via a radio interface. The radio interface is monitored with respect to an interference signal from an interference source prior to transmission via at least one of the first transmitting station and the first receiving station. The transmission only begins if the radio interface is sufficiently free from interference for a moment in time.01-29-2009
20080311859WIRELESS COMMUNICATION APPARATUS - Channel estimation in a MIMO communications system comprises performing a decomposition of an initial channel matrix estimate associated with a first subcarrier of a plurality thereof defined in the channel to identify eigenvectors associated with that subcarrier of the received signal, and defining a first beamforming transformation to be applied to the received signal on the basis of the eigenvectors. Then, for each of the other subcarriers, an additional decomposition is performed in order to determine a further beamforming transformation for each of said one or more other subcarriers, wherein said additional decompositions are carried out incrementally such that information determined in one of said decompositions contributes to a later executed decomposition. Further described is a method of transmitting from a multiple antenna transmitter defining a plurality of subcarriers in space, and time or frequency, comprising the same iterative process. This transmitting can be carried out using smoothed beamforming applied in accordance with aspects of the invention.12-18-2008
20100279627SYSTEM FOR LIMITING MOBILE DEVICE FUNCTIONALITY IN DESIGNATED ENVIRONMENTS - Apparatuses, systems and methods for limiting mobile device functionality in defined environments. One system includes a detection arrangement for detecting illicit mobile device RF transmissions and/or an operating state in relation to a defined environment, and a disabling arrangement for at least partially disabling the functionality of the mobile device upon detection of an illicit mobile device RF transmission or a particular operating state. For instance, the system may be implemented in an automobile or aircraft cabin to prevent drivers and/or passengers from utilizing at least one functionality of a mobile device (e.g., talking, texting, interne surfing).11-04-2010
20080254749Management of variable-rate communication links - A method for communication includes transmitting data from a transmitter to a receiver using Adaptive Coding and Modulation (ACM). The data rate is set by selecting, based on feedback, an ACM profile defining a Forward Error Correction code and a modulation scheme. Upon detecting that the feedback is unusable, an operation of the transmitter is changed independently of the feedback.10-16-2008
20110053520COMMUNICATION SYSTEM - A communication system includes a transmitter and a receiver. The transmitter includes a data transmitting section configured to transmit data. The receiver includes a data receiving section, a memory, a memory managing section, and a control section. The data receiving section is configured to receive the data transmitted from the transmitter. The memory is configured to store the received data. The memory managing section is configured to manage a total number of free regions discretely allocated on the memory. The control section is configured to perform a control process in accordance with the total number of the free regions on the memory, the control process including at least one of request for starting flow control to the transmitter and reallocation of the data stored in the memory for reducing the total number of the free regions.03-03-2011
20100285756METHOD FOR CONTROLLING COMMUNICATION, COMMUNICATION SYSTEM, AND COMMUNICATION APPARATUS - A first communication device determines whether a remaining amount of a buffer that stores therein information included in reception data is equal to or less than a predetermined amount, and inserts, upon being determined that the remaining amount of the buffer is equal to or less than the predetermined amount, a transmission control signal for controlling data transmission performed by a second communication device into an idle section of data transmitted to the second communication device. The data includes a data section with information and the idle section without information. The data into which the transmission control signal is inserted is transmitted to the second communication device. The second communication device receiving the data, detects the transmission control signal in the idle section of the data and controls the data transmission based on the detected transmission control signal.11-11-2010
20100330928FAST CONVERGENCE TO OPTIMAL BEAM PATTERNS - Systems and methods for joint training of beam patterns in a system having a transmitter and a receiver. Initial transmit and receive beam pattern vectors are first selected. The beam pattern vectors are perturbed to produce a plurality of perturbed transmit and receive beam pattern vectors. A received signal power between the transmitter and the receiver is estimated for each combination of the perturbed transmit and the perturbed receive beam pattern vectors. The transmit and receive beam pattern vectors having a highest received signal power are applied to the transmitter and the receiver respectively. The perturbation, estimation, and application steps are iterated until the received signal power meets a convergence criterion.12-30-2010
20090176458METHOD AND SYSTEM FOR PROVIDING STREAMING SERVICE - A streaming service method and system of the present invention is provided for improving service quality and reliability by transmitting data through an optimal wireless link selected among multiple wireless links available between a server and a client. A streaming service method for a system including a server and at least one client that can establish more than two wireless links with each other includes sending a link selection request message containing a content identifier from the server to the client; selecting, at the server, one of the wireless links for transmitting a content indicated by the content identifier; sending a link selection response message containing a link identifier of the selected wireless link from the server to the client; and receiving, at the client, the content transmitted by the server through the wireless link established with reference to the link identifier.07-09-2009
20090176457Apparatus and method for communicating with moving receivers - An apparatus for communicating with mobile receivers for emergency notification and other purposes comprises a localized (low power) transmitter capable of transmitting short bursts of compressed audio or video messages over a selected spatial range. The apparatus further contains a means of measuring the relative speed of the transmitter and receiver(s) and adjusting the transmission accordingly (for example by increasing the output power, shortening the burst length, or increasing the burst repetition rate). In this way, the effective “footprint” of the transmitter and/or the message length is matched to the time the receiver(s) pass within range of the transmitter so that each receiver is able to capture at least one complete burst in the available time. The transmitter may be relatively fixed, for instance on a highway overpass, for communicating with vehicles passing on the highway. Alternatively, the transmitter may be mounted on an emergency vehicle to warn vehicles ahead or on intersecting roads that the emergency vehicle is approaching. In this case, the transmitter may adjust its effective range based on the speed of the emergency vehicle itself.07-09-2009
20090197541FEEDBACK CANCELLATION SYSTEM AND METHOD - A system and method for detecting antenna coupling and for providing feedback cancellation in response to the antenna coupling includes a signal feedback cancellation circuit configured to be coupled between a signal receiver and a signal transmitter. The feedback cancellation circuit is responsive to received signals, amplified signals and the detection of signal coupling between a receiving antenna any transmitting antenna, for providing a feedback cancellation signal to a signal amplifier. The feedback cancellation circuit may employ time domain or frequency domain methods. In the case of a time domain method, the feedback cancellation circuit may further include a White noise generator which serves to the tune or adjust the feedback cancellation circuit.08-06-2009
20120040626WIRELESS TRANSMISSION SYSTEM, DEVICE AND METHOD - A wireless transmission system includes several candidate devices, a wireless transmission interface and a wireless transmission device. The wireless transmission device includes a storage unit, a transmission direction information generating unit -and a processing unit. The processing unit receives the device information of each of the candidate devices from each of the candidate devices respectively through the wireless transmission interface. The processing unit calculates transmission direction range according to the transmission direction information, which is generated through the transmission direction information generating unit. The processing unit selects at least one of the candidate devices, which matches the transmission direction range. Wherein, the selected at least one candidate device is taken as at least one transmission target device. The processing unit transmits the information to be transmitted, which is stored in the storage unit, to the transmission target device through the wireless transmission interface.02-16-2012
20090286486TRANSMIT CHANNEL IN WIDEBAND HIGH FREQUENCY WIRELESS SYSTEM USING MULTIPLE TRANSMIT ANTENNA, AND METHOD THEREOF - Disclosed are a transmitting device and receiving device for selecting a transmit channel in a wideband high frequency wireless system using a plurality of transmit antennas, and a method thereof. According to the method of selecting a transmit channel, data is transmitted to the receiving device via a predetermined first antenna, and a first channel probing response message including first channel status information of the first antenna is received, in response to the transmission of the data. A channel probing request message that request channel status information of a second antenna, is transmitted to the receiving device via the second antenna, and a second channel probing response message including the second channel status information of the second antenna is received in response to the channel probing request message.11-19-2009
20080305748METHOD AND SYSTEM FOR TRANSMITTING AND RECEIVING DATA OVER A COMMUNICATION CHANNEL BETWEEN TWO TRANSCEIVER STATIONS - Methods and systems for transmitting and receiving data over a communication channel between two transceiver stations are disclosed. A first decision is made during an initialization process, wherein the first decision comprises selecting a first subset of communication parameters. A second decision is made during the initialization process wherein the second decision comprises deciding whether one or more of the communication parameters of the first subset are to be changed depending on information collected about the communication channel.12-11-2008
20120058735SOUNDING FEEDBACK SCHEMES FOR VERY HIGH THROUGHPUT WIRELESS SYSTEMS - Certain aspects of the present disclosure relate to techniques for transmitting sounding feedback in Very High Throughput (VHT) wireless systems. The sounding feedback may be transmitted from a user station (STA), wherein the feedback may comprise a certain number of beamforming matrices and a certain number of singular values of a wireless channel associated with the STA. Further, the sounding feedback may comprise a bit for indicating whether this feedback represents a Single-User (SU) feedback or a Multi-User (MU) feedback.03-08-2012
20120157008METHOD FOR AVOIDING OVERFLOW OF MULTIPLICATION OF ROOTS-OF-UNITY BY USING OVERFLOW SAFE APPROXIMATED VALUES TABLE - An apparatus including a processor, a computer readable storage medium, and a lookup memory. The computer readable storage medium generally contains computer executable instruction that when executed by the processor perform operations involving fixed point multiplication. The lookup memory generally stores values used in the fixed point multiplication. The values stored in the lookup memory are approximated based upon a predetermined value to prevent overflow in the fixed point multiplication.06-21-2012
20110105052Cross-core calibration in a multi-radio system - A Radio Frequency (RF) transceiver includes a first RF transceiver group, a second RF transceiver group, local oscillation circuitry, and calibration control circuitry. Each of the RF transceiver group has an RF transmitter and an RF receiver. The local oscillation circuitry selectively produces a local oscillation to the first RF transceiver group and to the second RF transceiver group. The calibration control circuitry is operable to initiate calibration operations including transmitter self calibration operations, first loopback calibration operations, and second loopback calibration operations. During loopback calibration operations, test signals produced by an RF transceiver group are looped back to an RF receiver of another RF transceiver group.05-05-2011
20110105051DIFFERENTIAL CLOSED-LOOP TRANSMISSION FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS - A method and apparatus for providing channel feedback is provided herein. During operation a covariance matrix at time t (R) is calculated as a function of a received downlink signal. Matrix C05-05-2011
20120214423ADAPTIVE AVERAGE POWER TRACKING - Exemplary embodiments of the invention include a request received to change a TX output power setting or a frequency channel setting. In response, the requested TX output power setting is used to generate a TX output signal in the proper frequency channel. Handset circuitry makes OOB power measurements, the results of which are used to determine a VCC08-23-2012
20100173592Radio Communication Device and Radio Communication Method - A radio communication device according to the present invention adaptively controls directivity of a transmission radio signal by using a plurality of element antennas on the basis of a received radio signal received from a communication target counterpart radio communication device. The radio communication device includes a transmission controller configured to process the transmission radio signal according to a first control method for adaptively controlling the directivity, a propagation path state detector configured to detect fluctuation state of a propagation path to a counterpart radio communication device, and a judgment unit configured to judge whether or not to change the directivity on the basis of the fluctuation state of the propagation path. If it is judged that the directivity is to be changed, the transmission controller switches to a second control method that is different from the first control method, and processes the transmission radio signal according to the second control method.07-08-2010
20100062725METHOD OF TRANSMITTING AND RECEIVING A MESSAGE ASSOCIATED WITH POWER SAVING MODE IN A WIRELESS COMMUNICATION SYSTEM - Disclosed is a sleep mode in a broadband wireless access system, more particularly a method of transmitting and receiving a message associated with a sleep mode in a broadband wireless access system. The method of transmitting a message associated with a sleep mode in a broadband wireless access system includes transmitting a first message which includes a flag if a receiving side receives the first message associated with the sleep mode, the flag indicating that the receiving side transmits an acknowledgement signal to a transmitting side, and receiving the acknowledgement signal from the receiving side which has received the first message.03-11-2010
20120178380Wireless Communication Techniques - Wireless communication techniques are described. In one or more implementations, techniques are described that involve active power control such that a device may bypass use of a power amplifier to communicate wirelessly. In one or more additional implementations, wireless communication techniques are described in which multiple bands may be leveraged to provide wireless communication. In one or more further implementations, wireless communication techniques are described in which a frame buffer on a receiving device is leveraged by a sending device. Yet further, in one or more implementations wireless communication techniques are described in which a sending device employs codec adaptation. Still yet further, in one or more implementations, wireless communication techniques are described which may be used to change characteristics of a channel used to communicate data. Yet further again, in one or more implementations, a receiving device is configured to adjust a display based on wireless communications received from a plurality of devices, such as to leverage a display by multiple wireless sources.07-12-2012
20120178381APPARATUS AND METHOD FOR UPLINK CLOSED LOOP TRANSMIT DIVERSITY - An apparatus, method, and computer program product operable to determine a phase of a beamforming weight vector utilizing a memory of a previously used phase for the beamforming weight vector, capable of improving a channel estimate. A base station transmits a beamforming weight vector to a user equipment based on a determined channel estimate. The user equipment selects between the received beamforming weight vector, or a modified beamforming weight vector having its phase shifted by −360°, in accordance with a suitable selection criteria. That is, the selection is made such that a difference between the phase of the selected beamforming vector and a phase of a prior beamforming vector is within a predetermined range.07-12-2012
20090061786WIRELESS RECEPTION APPARATUS, WIRELESS TRANSMISSION APPARATUS, WIRELESS COMMUNICATION SYSTEM, WIRELESS RECEPTION METHOD, WIRELESS TRANSMISSION METHOD, AND WIRELESS COMMUNICATION METHOD - The present invention relates to an apparatus and a method capable of achieving closed loop MIMO communications, using reduced feedback, without a loss in system performance. In one embodiment of the present invention, a phase-rotated right handed singular vector matrix is derived from an estimation result of a MIMO channel (steps 03-05-2009
20090061785SCALABLE DECODER AND SCALABLE DECODING METHOD - A scalable decoder capable of avoiding deterioration in subjective quality of a listener. The scalable decoder for decoding core layer encoding data and extension layer encoding data including an extension layer gain coefficient, wherein a voice analysis section detects variation in power of a core layer decoding voice signal being obtained from the core layer encoding data, a gain attenuation rate calculating section (03-05-2009
20120190309System and Method for Assisted Open Loop Multiple Input, Multiple Output Communications - A system and method for assisted open loop (OL) multiple input, multiple output (MIMO) communications are provided. A method for controller operations includes: adjusting a transmitter used to transmit information in OL MIMO transmissions, the adjusting based on partial channel information for a channel between a controller and a communications device; and transmitting to the communications device using the adjusted transmitter.07-26-2012
20110124298RADIO COMMUNICATION SYSTEM - A radio communication system in which a plurality of radio channels are divided in a frequency direction and mapped to a radio frame format, whereby each radio channel mapped in the radio frame format is assigned to each user or service. The radio communication system includes a radio communication apparatus and a terminal to receive a pilot signal and a data signal from the radio communication apparatus, whereby the radio communication apparatus controls a pilot signal position for each user or service and notifies information used for identifying the pilot signal position to the terminal.05-26-2011
20110003561METHOD AND ARRANGEMENT IN A COMMUNICATION SYSTEM - Methods and arrangements for generating adjustment commands in a node. The adjustment commands adjust the transmission power of radio signals. The radio signals are sent over at least a first channel and a second channel. The adjustment is performed by adjusting a gain factor. The gain factor is associated with the relation between a first transmission power level of a first channel and a second transmission power level of a second channel.01-06-2011
20110045785BIDIRECTIONAL ITERATIVE BEAM FORMING - Bidirectional iterative beam forming techniques are described. An apparatus may include a wireless device having an antenna control module operative to initiate beam formation operations using an iterative training scheme to form a pair of communications channels for a wireless network, the antenna control module to communicate training signals and feedback information with a peer device via the transceiver and phased antenna array using partially or fully formed high rate channels, and iteratively determine antenna-array weight vectors for a directional transmit beam pattern for the phased antenna array using feedback information from the peer device. Other embodiments are described and claimed.02-24-2011
20110045784WIRELESS TRANSMISSION APPARATUS AND MODULATION SCHEME SELECTION METHOD - A wireless transmission apparatus that can accurately select an optimal modulation scheme on a per block basis in a multi-carrier communication system in which block division of subcarriers and adaptive modulation are performed. In this wireless transmission apparatus, a propagation path characteristics acquisition section acquires the average SNR and SNR variance for each block, which are estimated by a wireless reception apparatus, using received signals inputted from a reception RF section and outputs these to an assignment section. The assignment section selects a modulation scheme for each block based on the average SNR and SNR variance of each block inputted from the propagation path characteristics acquisition section and modulation sections modulate multi-carrier signals included in each block, with the modulation scheme for each block selected by the assignment section.02-24-2011
20110045783SYSTEM AND METHOD OF WIRELESS COMMUNICATION - A method, program and system for transmitting from a transmitter to a receiver over a wireless multipie-input-multiple-output channel. In one aspect, the method may comprise encoding precoding information fed back from the receiver to the transmitter according to a differential encoding scheme, and resetting the differential encoding scheme upon detecting a condition. In another aspect, the method may comprises encoding precoding matrices fed back from the receiver to the transmitter relative to a most-probable subset of precoding matrices. In another aspect, the method may comprise transmitting an indication of and/or the size of a preferred subset of precoding matrices for use in the encoding.02-24-2011
20120270506POWER CONSUMPTION MANAGEMENT BASED ON RECEIVER PARAMETER AND METHOD FOR USE THEREWITH - An integrated circuit (IC) includes an RF receiver having an AGC module that generates an automatic gain control (AGC) signal based on a strength of a received signal, and a low noise amplifier that amplifies the received signal based on the AGC signal. A processing module generates a power mode signal based on the AGC signal, the power mode signal for adjusting a power consumption parameter of the IC based on the power mode signal.10-25-2012
20120094611INDEPENDENT POWER CONSUMPTION MANAGEMENT IN A MIMO TRANSCEIVER AND METHOD FOR USE THEREWITH - An integrated circuit (IC) includes a multi-input multi-output transceiver system that includes a plurality of RF transceivers. Each RF transceiver includes an RF transmitter that transmits a transmit signal at a selected transmit power, based on a transmit power control signal and a corresponding RF receiver for receiving a corresponding one of a plurality of received signals from an external device and for generating a signal strength indication corresponding to each of the plurality of received signals. A processing module generates the transmit power control signal for each RF transmitter based on the signal strength indication of the corresponding RF receiver, and that generates a power mode signal for adjusting a power consumption parameter of each RF transmitter in accordance with the selected transmit power for each RF transmitter.04-19-2012
20120100816COMMUNICATION APPARATUS - According to one exemplary embodiment, a communication apparatus includes: a measurement module which measures reception power of each field; a determination module which determines whether the reception power is within a range; a calculator which calculates a gain using the reception power if the reception power is not within the range; an adjuster which adjusts a field according to one of an initial gain and the calculated gain; a selector which selects a field length according to the number of field adjustments by the adjuster; and a transmitter which transmits information regarding the field length. When the number of the adjustments is lower than a first threshold value, the selector selects a first value, and when the number of the adjustments is equal to or higher than the first threshold value, the selector selects a second value that is higher than the first value, as the field length.04-26-2012
20100167663Mobile Communication Device and Communication Method Thereof - A mobile communication device is provided. The mobile communication device comprises a radio frequency (RF) module, a first communication module, a second communication module and a control module. The RF module is used to transmit and receive RF signals. The first communication module utilizes the RF module to establish a first communication connection. The second communication module utilizes the RF module to establish a second communication connection. The control module arbitrates requests to access the RF module from the first communication module and the second communication module.07-01-2010
20100130138Protocol adaptation layer for wireless communications - Protocol adaptation layer for wireless communications. Communication devices that include one or more radio modules operable in accordance with multiple communication protocols establish communications using one communication protocol and then switch to another communication protocol. This switching to another communication protocol may be performed based on a variety of factors including effectuating communications of higher throughput, supporting uni-directional communications vs. bi-directional communications, or any other desired factor. In some embodiments, various communication devices include two radio modules that are each implemented to operate in accordance with one particular communication protocol. Alternatively, a multi-protocol capable radio module may support and operate in accordance with more than one communication protocol. Examples of possible communication protocols include those compliant with Bluetooth, IEEE 802.11, and/or 802.15.3c.05-27-2010
20110159821METHOD AND SYSTEM FOR IMPROVING WIRELESS LINK ROBUSTNESS USING SPATIAL DIVERSITY - A system and method for using spatial diversity for improving link quality, particularly wireless link communication. A plurality of propagation paths are used simultaneously for a wireless link, and a plurality of strong propagation paths are selected from among available propagation paths. Propagation path measurements are made to determine strong signal propagation paths. An array antenna at a transmitter and at a receiver are controlled to communicate over a plurality of simultaneous signal propagation paths.06-30-2011
20130023219ESTIMATION OF SIGNAL TO NOISE RATIO IN RECEIVERS - This invention concerns the estimation of signal to noise ratio (SNR) at a communications receiver; it may be applicable to a wide range of receivers but is particularly suited for Orthogonal Frequency Division Multiplexing (OFDM) receivers. In particular the invention is a method, a receiver and software for performing the method. The signal to noise ratio (SNR) in the received signals is estimated by directly estimating the power ratio, in the received signal, between the part of the frequency spectrum of the received signal that contains only noise, and the part of the spectrum that contains both signal and noise; and averaging this value over a time interval.01-24-2013
20080233885System And Method For Dynamically Improving Call Connection - A method for controlling an output of a power amplifier of a portable communication device includes determining a power level of a signal received at the portable communication device, generating a receive reference signal (RXLEV) that is indicative of the power level of the signal received at the portable communication device, and determining whether the receive reference signal is within a threshold value window. When the receive reference signal is within the threshold value window a nominal power output of a power amplifier in the portable communication device is transmitted during a random access channel signal transmission. When the receive reference signal is below the threshold value, a power output of the power amplifier in the portable communication device is increased during the random access channel signal transmission. When the receive reference signal is above the threshold value, a power output of the power amplifier in the portable communication device is decreased during the random access channel signal transmission.09-25-2008
20080227405METHOD, APPARATUS AND SYSTEM FOR PROVIDING TRANSMIT DIVERSITY FEEDBACK - A receiver, or base station, may calculate the signal quality improvement based on a change in a diversity control parameter, for example, a phase difference or a power ratio among two or more antennas, by comparing a received signal power level to an expected power level, assuming no change in fading characteristics at the previous timeslot. This method may increase the amount of information communicated between the base station and the mobile unit, and may reduce feedback response time and/or provide for more efficient feedback for transmit diversity systems.09-18-2008
20080227404METHOD, APPARATUS AND SYSTEM FOR PROVIDING FEEDBACK TO A TRANSMIT DIVERSITY DEVICE - A method and system for improving closed loop feedback in transmit diversity communication. In one embodiment of the invention, a predetermined variation of one or more transmit diversity parameters is performed at the transmit diversity transmitter. The receiver compares the transmit diversity parameter values of the received signals to the predetermined variation and transmits to the transmitter a value of a transmit diversity correction parameter. The transmitter may use this correction value to modify the transmit diversity parameter in a subsequent transmission.09-18-2008
20080220726METHOD AND SYSTEM FOR OPTIMIZING DATA TRANSFER RATE IN A COMMUNICATION NETWORK - A method and base station for optimizing a data rate control value for a wireless communication device in a communication network system is provided. The method comprises receiving (09-11-2008
20080220725DATA TRANSMISSION METHOD, COMMUNICATION SYSTEM, TRANSCEIVER, TRANSMITTER AND RECEIVER - A data transmission method, a communication system, a transceiver, a transmitter and a receiver are described. In a data transmission method, a signal is transmitted between a first transceiver and a second transceiver, said signal being generated based on configuration parameters. A reconfiguration request signal is transmitted to said second transceiver. Said reconfiguration request signal is evaluated at said second transceiver. Said first transceiver is reconfigured based on a result of said evaluating to generate a further signal based on new configuration parameters different from said configuration parameters.09-11-2008
20100279626SYSTEM FOR LIMITING MOBILE DEVICE FUNCTIONALITY IN DESIGNATED ENVIRONMENTS - Apparatuses, systems and methods for limiting mobile device functionality in defined environments. One system includes a detection arrangement for detecting illicit mobile device RF transmissions and/or an operating state in relation to a defined environment, and a disabling arrangement for at least partially disabling the functionality of the mobile device upon detection of an illicit mobile device RF transmission or a particular operating state. For instance, the system may be implemented in an automobile or aircraft cabin to prevent drivers and/or passengers from utilizing at least one functionality of a mobile device (e.g., talking, texting, interne surfing).11-04-2010
20080207135CQI FEEDBACK FOR OFDMA SYSTEMS - Embodiments of a feedback generator and decoder and methods of operating the feedback generator and decoder are presented. In one embodiment, the feedback generator includes a CQI compression module configured to provide a compressed CQI for the user equipment corresponding to at least one sub-band, where a sub-band is composed of at least one resource block. The feedback generator also includes a transmit module coupled to the CQI compression module and configured to transmit the compressed CQI to a serving base station. In one embodiment, the feedback decoder includes a receive module configured to receive a compressed CQI in the base station from user equipment corresponding to at least one sub-band. The feedback decoder also includes a CQI restoration module coupled to the receive module and configured to provide a restored CQI from the compressed CQI for the at least one sub-band.08-28-2008
20130183909RADIO APPARATUS, AND METHOD AND PROGRAM FOR CONTROLLING SPATIAL PATH - A PDMA terminal (07-18-2013
20110312285ADAPTIVE THRESHOLDING IN A WAKE-ON-RADIO SYSTEM - A method for modifying a wake threshold for a wake-on-radio (WOR) receiver including: setting the wake threshold at a first level, counting false crossings of the wake threshold, and optionally modifying the wake threshold level based, at least in part, on a result of the counting. A receiver in a wake-on-radio (WOR) system including a wake-on-radio unit configured to implement the method for modifying a wake threshold. A method for setting a transmit power level of a transmitter for a wake-on-radio (WOR) system transmitter including: setting the level at a low level, receiving reports of false crossings of a wake threshold from a WOR receiver, and counting false crossings reported by the WOR receiver, and optionally modifying the transmit power level based, at least in part, on a result of the counting. A transmitter in a wake-on-radio (WOR) system including a transmit power adapter configured to implement the above method. Related apparatus and methods are also described.12-22-2011

Patent applications in class Transmitter controlled by signal feedback from receiver