Patent application number | Description | Published |
20080253471 | SYSTEMS AND METHODS FOR ADAPTIVE BIT LOADING IN A MULTIPLE ANTENNA ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED COMMUNICATION SYSTEM - In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the same set of OFDM subcarriers and may take advantage of the multipath characteristics of the spatial channel allowing the communication of additional data without an increase in frequency bandwidth. Space-frequency subcarrier modulation assignments may be dynamically assigned on a per subcarrier basis as well as a per spatial channel basis to help maximize the data-carrying capacity of the channel. In some embodiments, each of the spatial channels may be associated with one of a plurality of spatially diverse antennas. In other embodiments, beamforming may be performed to allow the transmission and/or reception of signals within the spatial channels. | 10-16-2008 |
20080310526 | Method, device, and apparatus for multi-stream multi-band transmission - A transmitter may include a set of stream groups, each including two or more streams producing a set of orthogonal frequency division multiplexed (OFDM) stream-symbols and a coding unit interleaving the stream-symbols into an interleaved signal. An input bit multiplexer may route an input data signal to be divided among each of the streams. An inverse fast Fourier transform unit may operate on a combined signal formed from interleaving the interleaved signals from each stream group. Each stream may include for example a baseband signal processor producing the OFDM stream-symbols. | 12-18-2008 |
20090110103 | ADAPTIVE PUNCTURING TECHNIQUE FOR MULTICARRIER SYSTEMS - Various embodiments are described for adaptive puncturing techniques. | 04-30-2009 |
20090196232 | METHOD AND APPARATUS TO EXCHANGE CHANNEL INFORMATION - A method and apparatus to exchange channel state information between two or more stations is provided, The channel state information may be used to adapt a power, a transmission rate and a modulation scheme of a transmitted signal. Other embodiments are described and claimed. | 08-06-2009 |
20090245405 | MIMO TRANSMITTER AND METHOD FOR TRANSMITTING A GROUP OF SEQUENTIAL OFDM SYMBOLS IN ACCORDANCE WITH AN IEEE 802.16 COMMUNICATION STANDARD - A multiple-input-multiple output (MIMO) transmitter for transmitting a group of sequential orthogonal frequency division multiplexed (OFDM) symbols on a time-division duplexed (TDD) channel in accordance with an IEEE 802.16 standard using a plurality of antennas. The MIMO transmitter comprises a spatial-frequency parser to parse a block of bits into spatial-frequency blocks of a variable number of coded bits, and subcarrier modulators to individually modulate OFDM subcarriers with the spatial-frequency blocks in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers. The TDD channel comprises a plurality of the groups of the OFDM subcarriers, and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments. | 10-01-2009 |
20090252257 | MIMO TRANSMITTER AND METHOD FOR TRANSMITTING AN OFDM SYMBOL IN ACCORDANCE WITH AN IEEE 802.11 COMMUNICATION STANDARD OVER A PLURALITY OF SPATIAL CHANNELS - A multiple-input-multiple output (MIMO) transmitter for transmitting an orthogonal frequency division multiplexed (OFDM) symbol over a plurality of spatial channels using a plurality of antennas is described. The transmitter includes encoding circuitry to encode blocks of input bits in accordance with a variable encoding rate to generate blocks of encoded bits and a spatial-frequency parser to parse the blocks of encoded bits into spatial-frequency groups. The transmitter also includes subcarrier modulators to modulate each spatial-frequency group of encoded bits on one of the OFDM subcarriers to generate symbol-modulated subcarriers. Spatial-frequency groups having a greater number of encoded bits are modulated at higher-order modulation levels and spatial-frequency groups having a lesser number of encoded bits are modulated at lower-order modulation orders. | 10-08-2009 |
20090257454 | OFDM TRANSMITTER WITH ADAPTIVE BIT INTERLEAVER FOR ADAPTIVE BIT LOADING AND METHOD FOR OFDM COMMUNICATIONS - A multi-antenna transmitter includes an adaptive bit interleaver for orthogonal frequency division multiplexed (OFDM) communications. The adaptive bit interleaver permutes a variable number of coded bits per OFDM symbol (Ncbps). The variable number of coded bits is calculated based on individual subcarrier modulation assignments for orthogonal subcarriers. The interleaver matrix size may be based on the variable number of coded bits per OFDM symbol and the number of subchannels. The interleaver may add padding bits to the interleaver matrix to fill any remaining positions, and after performing an interleaving operation, the interleaver may prune the padding bits to provide a sequence of interleaved bits for subsequent modulation on the orthogonal subcarriers and transmission by more than one antenna. The transmitter may transmit the OFDM symbol in accordance with an IEEE 802.16 standard. | 10-15-2009 |
20100135238 | SYSTEMS FOR COMMUNICATING USING MULTIPLE FREQUENCY BANDS IN A WIRELESS NETWORK - Communication signals using a first and a second frequency band in a wireless network is described herein. The first frequency band may be associated with a first beamwidth while the second frequency band may be associated with a second beamwidth. A method includes transmitting, in a first frequency band by a coordinating device, an indication of a first time resource and/or first frequency resource for a communication device to identify one or more neighbor communication devices that are capable of communicating over a second frequency band, receiving, in the first frequency band by the coordinating device, link availability information for the second frequency band based at least in part on the one or more neighbor communication devices identified as being capable of communicating over the second frequency band, and transmitting, in the first frequency band, a transmission schedule to indicate to the communication device a second time resource and/or second frequency resource in which the communication device can communicate with at least one of the one or more neighbor communications devices over the second frequency band, the transmission schedule being based at least in part on the received link availability information. Other embodiments may be described and/or claimed. | 06-03-2010 |
20100135426 | MODULATION SCHEME FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS OR THE LIKE - Briefly, in accordance with one embodiment of the invention, bit and power loading may be utilized to select a modulation rate and subcarrier power scaling based on channel state information. As a result, a higher data rate may be utilized for a given signal-to-noise ratio while maintaining a constant bit error rate. | 06-03-2010 |
20100195485 | CHANNEL ESTIMATION FEEDBACK IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM OR THE LIKE - Briefly, in accordance with one embodiment of the invention, a channel state information packet is encoded by a receiver side device and is fed back to the transmitter side device. The transmitter side device decodes the channel state information packet to extract an estimate of the channel response function. | 08-05-2010 |
20100195545 | SYSTEMS AND METHODS FOR ADAPTIVE BIT LOADING IN A MULTIPLE ANTENNA ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED COMMUNICATION SYSTEM - An embodiment of the present invention provides a method of supporting multiple protocols in a wireless network operating according to an Institute for Electronic and Electrical Engineers IEEE) 802.16 standard, comprising adding a new convergence sub layer (CS) type in which an extra field is added to an 802.16 service data unit (SDU) to indicate which higher layer protocol is carried in a 802.16 SDU payload. | 08-05-2010 |
20110044273 | HIGH THROUGHPUT COMMUNICATION STATION AND METHOD FOR COMMUNICATING OVER A PRIMARY CHANNEL AND A SECONDARY CHANNEL - Embodiments of a high-throughput (HT) communication station (STA) and method for communicating over a primary and a secondary channel are generally described herein. In some embodiments, the high-throughput (HT) communication station (STA) comprises a physical layer (PHY) and a media-access control (MAC) layer to provide a data unit to the physical layer. The PHY layer may be configured to transmit a packet that includes the data unit over a channel bandwidth comprising a first channel and an additional channel in accordance with an OFDM communication technique. The packet may have a frame structure that includes a channel bandwidth parameter to indicate the channel bandwidth used, a modulation and coding parameter to indicate a modulation and coding scheme of the packet as transmitted over the channel bandwidth. | 02-24-2011 |
20110044392 | Systems And Methods For High-Throughput Wideband Wireless Local Area Network Communications - A frame format provides for wideband wireless local area network communications and informs narrower-band communication units when the channels are occupied by wider-band communication units. In some embodiments, the frame format includes a channelization field identifying channels that are used for communicating subsequent wideband fields of a packet, and a wideband-header field communicated on the identified channels. The wideband-header field may identify sub-fields that may be present in the wideband-header field, and may identify the presence of a wideband-data field. A long-compatibility field may be present that provides protection at the MAC level. The long-compatibility field may transport MAC frames that may include medium-reservation information compatible with narrower-band communication units. | 02-24-2011 |
20110096856 | OFDM TRANSMITTER AND METHOD FOR MULTI-USER MIMO TRANSMISSIONS - An orthogonal-frequency division multiplexed (OFDM) transmitter is configured to transmit a data unit in accordance with a multiple-input multiple-output (MIMO) technique over a wideband channel comprising a 20 MHz channel and another channel using a plurality of spatially diverse antennas. The transmitter is further configured to include in the data unit, a parameter indicating a modulation and coding scheme and a parameter indicating number of spatial streams. Each of the spatial streams is encoded and beamformed for receipt by one or more different receiving stations. | 04-28-2011 |
20110110467 | MULTI-USER MIMO RECEIVER AND METHOD FOR RECEIVING DATA UNITS OVER A WIDEBAND CHANNEL - A multiple-input multiple output (MIMO) receiver includes circuitry to receive a MIMO transmission through a plurality of antennas over a channel comprising two or more 20 MHz portions of bandwidth. The MIMO transmission comprises a plurality of streams, each transmitted over a corresponding spatial channel and configured for reception by multiple user stations. The MIMO receiver also includes circuitry to simultaneously accumulate signal information within at least two or more of the 20 MHz portions of bandwidth. Each 20 MHz portion comprises a plurality of OFDM subcarriers. The MIMO receiver also includes circuitry to demodulate at least one of the steams using receive beamforming techniques. In this way, multi-user protocol data units can be received. | 05-12-2011 |
20120026862 | VARIABLE BANDWIDTH OFDM RECEIVER AND METHODS FOR RECEIVING OFDM SIGNALS OF DIFFERENT BANDWIDTHS - A variable bandwidth OFDM receiver and methods for receiving OFDM signals of different bandwidths are generally disclosed herein. The variable bandwidth OFDM receiver may be configured to receive signals over wider bandwidths by processing a resource block of subcarriers comprising a greater number of subcarriers, and receive signals over narrower bandwidths by processing a resource block of subcarriers comprising a lesser number of subcarriers. The resource blocks have a number of OFDM symbols in a time dimension to define a time slot, and each wherein the resource block comprises a minimum number of subcarriers for a narrowest bandwidth for a predetermined minimum bandwidth reception and a predetermined maximum number of subcarriers for a maximum bandwidth reception. In some embodiments, the variable bandwidth receiver may operate in accordance with an 3GPP LTE E-UTRAN standard. | 02-02-2012 |
20120207242 | ADAPTIVE PUNCTURING TECHNIQUE FOR MULTICARRIER SYSTEMS - Various embodiments are described for adaptive puncturing techniques. | 08-16-2012 |
20120236911 | MIMO TRANSMITTER AND METHOD FOR TRANSMITTING OFDM SYMBOLS - An orthogonal-frequency division multiplexed (OFDM) transmitter is configured to transmit a data unit in accordance with a multiple-input multiple-output (MIMO) technique over a wideband channel comprising a 20 MHz channel and another channel using a plurality of spatially diverse antennas. The transmitter is further configured to include in the data unit, a parameter indicating a modulation and coding scheme and a parameter indicating number of spatial streams. Each of the spatial streams is encoded and beamformed for receipt by one or more different receiving stations. | 09-20-2012 |
20120250778 | MODULATION SCHEME FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS OR THE LIKE - Briefly, in accordance with one embodiment of the invention, bit and power loading may be utilized to select a modulation rate and subcarrier power scaling based on channel state information. As a result, a higher data rate may be utilized for a given signal-to-noise ratio while maintaining a constant bit error rate. | 10-04-2012 |
20120275539 | OFDM TRANSMITTER WITH VARIABLE CODE BLOCK INTERLEAVER AND METHOD FOR OFDM COMMUNICATIONS WITH VARIABLE CODE BLOCK SIZES - A multi-antenna transmitter is configured for orthogonal frequency division multiplexed (OFDM) communications. The multi-antenna transmitter includes circuitry to receive an input bit sequence for code block segmentation including adding filler bits based on a selected code block size, a encoder to encode the bit sequence and an interleaver configurable to perform interleaving operations on blocks of bits of various code block sizes of the bit sequence. A controller is to select the code block size for the interleaver and OFDM transmitter circuitry to transmit OFDM symbols on subcarriers utilizing more than one antenna. The OFDM symbols are generated at least in part from the interleaved blocks. | 11-01-2012 |
20130308717 | MILLIMETER-WAVE TRANSCEIVER WITH COARSE AND FINE BEAMFORMING WITH INTERFERENCE SUPPRESSION AND METHOD - Embodiments of millimeter-wave transceivers with coarse and fine beam steering with interference suppression are generally described herein. In some embodiments, a millimeter-wave transceiver configured for multipath reception of multicarrier signals and includes RF circuitry to receive multicarrier signals through at least two independently controllable sub-arrays from first and second directions, a channel-estimation block to generate a set of weighting coefficients for each sub-array based on channel characteristics determined from each sub-array, the weighting coefficients generated for inter-channel interference (ICI) suppression, and maximum-ratio combining (MRC) circuitry to apply a set of the weighting coefficients to baseband signals from each sub-array and to combine the weighted baseband signals from each sub-array to generate combined baseband signals that represent a single data stream. | 11-21-2013 |
20130314280 | MULTI-ELEMENT ANTENNA BEAM FORMING CONFIGURATIONS FOR MILLIMETER WAVE SYSTEMS - Multiple transmit antenna beam formers include/share a same set of power amplifiers and antenna elements to form multiple concurrent transmit antenna beams. Multiple receive antenna beam formers include/share a same set of antenna elements and low noise amplifiers to form multiple concurrent receive antenna beams. A transceiver includes the multiple transmit antenna beam formers and the multiple receive antenna beam formers, where the multiple transmit and receive beam formers include/share the same set of antenna elements. The transmit antenna beam formers and the receive antenna beam formers are configured to transmit, receive, and operate in the millimeter wave frequency band. | 11-28-2013 |
20140126620 | APPARATUS, SYSTEM AND METHOD OF BEAM SELECTION FOR BEAMFORMED DIVERSITY WIRELESS COMMUNICATION - Some demonstrative embodiments include devices, systems and/or methods of beam selection for beamformed communication. For example, an apparatus may include a controller to control a plurality of antenna subarrays to form a plurality of directional beams for communicating a beamformed diversity wireless transmission over a plurality of selected directional links, which are selected based on at least one predefined selection metric. | 05-08-2014 |
20140148107 | Using Multiple Frequency Bands With Beamforming Assistance in a Wireless Network - A communication device communicates with other communication devices in a wireless network using a first and a second frequency band. In accordance with some embodiments, inter-band beamforming assistance may be provided by the lower frequency band. | 05-29-2014 |
20140203969 | APPARATUS, SYSTEM AND METHOD OF STEERING AN ANTENNA ARRAY - Some demonstrative embodiments include apparatuses, devices systems and/or methods of steering an antenna array. For example, an apparatus may include a baseband processor including a plurality of baseband processing chains to process signals to be communicated via a plurality of antenna modules of an antenna array, wherein the baseband processing chains include a plurality of frequency domain delay modules, a frequency domain delay module of the delay modules is to apply a time delay to a signal to be communicated via an antenna module of the plurality of antenna modules. | 07-24-2014 |
20140204846 | APPARATUS, SYSTEM AND METHOD OF WIRELESS BACKHAUL AND ACCESS COMMUNICATION VIA A COMMON ANTENNA ARRAY - Some demonstrative embodiments include apparatuses, systems and/or methods of wireless backhaul and access communication via a common antenna array. For example, an apparatus may include a wireless communication unit to control an antenna array to form one or more first beams for communicating over one or more access links and to form one or more second beams for communicating over one or more backhaul links, the access links including wireless communication links between a wireless communication node and one or more mobile devices, and the backhaul links including wireless communication links between the wireless node and one or more other wireless communication nodes. | 07-24-2014 |
20140204902 | APPARATUS, SYSTEM AND METHOD OF HANDOVER OF A BEAMFORMED LINK - Some demonstrative embodiments include devices, systems and/or methods of handover of a wireless beamformed link. For example, an apparatus may include a wireless communication unit to communicate between a wireless communication node and a mobile device via a beamformed link between the wireless communication node and the mobile device, the wireless communication unit is to determine a handover candidate for handing over the mobile device, based on at least one beamforming parameter of the beamformed link. | 07-24-2014 |
20140206368 | APPARATUS, SYSTEM AND METHOD OF WIRELESS BACKHAUL COMMUNICATION BETWEEN WIRELESS COMMUNICATION NODES - Some demonstrative embodiments include apparatuses, systems and/or methods of wireless backhaul communication between wireless communication nodes. For example, a wireless communication controller may control a wireless communication node to communicate with one or more other wireless communication nodes via one or more backhaul links of a backhaul network over a first frequency band, and to communicate with a control station via a control link over a second frequency band, the first frequency band is higher than the second frequency band. | 07-24-2014 |
20140210666 | APPARATUS, SYSTEM AND METHOD OF WIRELESS COMMUNICATION VIA AN ANTENNA ARRAY - Some demonstrative embodiments include apparatuses, systems and/or methods of wireless communication via an antenna array. For example, an apparatus may include an antenna array including a plurality of antenna modules arranged along a first axis, an antenna module of the antenna modules including an antenna sub-array coupled to a Radio-Frequency (RF) chain, the antenna sub-array including a plurality of antenna elements arranged along a second axis, the second axis is perpendicular to the first axis, and the RF chain is to process RF signals communicated via the plurality of antenna elements. | 07-31-2014 |
20140219291 | IMPLEMENTING A PROTOCOL ADAPTATION LAYER OVER AN INTERNET PROTOCOL - A system and method are provided that allow WiGig protocol adaptation layers (PALs) to operate differently from the proposed WiGig standard on top of an Internet protocol (IP) layer in order to enhance routing options for communication of the data traffic between a transmitting (source) device and a receiving (sink) device. A layering architecture is provided that allows WiGig PALs, such as WDE, to operate on top of an IP layer. A signaling mechanism is also provided that allows a negotiation, or at least an indication, of the underlying layering structure for specific data communications. Recognizing that the next generation wireless display requires technology such as WiGig WDE to support the driving demand for a cable replacement user experience and richer wireless display use cases, this PAL over IP architecture optimizes alignment of the WiGig data communication technology with other data communication technologies. | 08-07-2014 |
20140235287 | APPARATUS, SYSTEM AND METHOD OF TRANSMIT POWER CONTROL FOR WIRELESS COMMUNICATION - Some demonstrative embodiments include apparatuses, systems and/or methods of transmit power control for wireless communication. For example, an apparatus may include a controller to control a plurality of transmit powers of a plurality of directional beams formed by an antenna array to transmit a wireless communication. The controller may control the plurality of transmit powers based on at least first and second power limits, the first power limit including a power density limit corresponding to a power density of a directional beam of the plurality of directional beams, and the second power limit including a total transmit power limit corresponding to a total of the transmit powers. | 08-21-2014 |
20140292090 | IMPLEMENTING WIRELESS POWER TRANSFER WITH 60 GHZ MMWAVE COMMUNICATION - A system and method are provided to form multiple separate beamformed wireless communication links between a 60 GHz mmWave transmitter and a cooperating 60 GHz mmWave receiver, to transfer not only wireless data communication between the cooperating devices, but also to transmit usable wireless power between the cooperating devices. These systems and methods employ a technology for establishing multiple beamformed wireless communication links between cooperating 60 GHz mmWave communication devices to transfer wireless data communication between the cooperating devices, and separately to transmit usable wireless power between the cooperating devices over separate wireless directional beamformed links between the devices providing efficient and effective wireless power transmission between the devices based on the directionality of the beamformed links. Because 60 GHz mmWave transmissions are highly directional, with beamwidths on the order of 10-20 degrees, power loss based on wasted energy when compared to existing omnidirectional wireless power transmission systems is significantly reduced. | 10-02-2014 |
20140293870 | BEAMFORMING BASED ON INFORMATION FROM PLATFORM SENSORS - A system and method are provided for triggering re-beamforming in a 60 GHz communication link based on information collected from platform positional sensors associated with one or the other or both of the transmitters/receivers that constitute ends of the communication link. The disclosed systems and methods monitor various positional sensors that may be used to sense translational and rotational movement of at least one of the platforms on which at least one of the transmitters/receivers is mounted. Information provided by the positional sensors is processed to determine whether or not to trigger re-beamforming for link recovery in 60 GHz communication link. Information provided by the sensors may be used in combination with other link operating metrics, such as PER and RSSI, to make an intelligent determination whether to trigger re-beamforming. | 10-02-2014 |
20140294106 | IMPLEMENTING MIMO IN MMWAVE WIRELESS COMMUNICATION SYSTEMS - A system and method are provided to increase data rates available in mmWave wireless communication systems by adapting a multiple-input multiple-output (MIMO) in a next generation mmWave wireless communication system. The system and method advantageously employ the characteristics of mmWave antenna arrays, including multiple antenna elements in each antenna array, to implement the MIMO scheme by establishing multiple beamformed communication links between a mmWave transmitter and receiver. An outgoing signal is divided into multiple signal elements to correspond to the multiple beamformed links and each of the multiple signal elements is transmitted by the transmitter across a different one of the multiple beamformed links to be reassembled at the receiver. An antenna element allocation scheme is incorporated to assign specific numbers and configurations of antenna elements at each of the transmitted and receiver to each of the multiple beamformed communication links. | 10-02-2014 |
20150055735 | MULTI-USER MIMO RECEIVER AND METHOD FOR RECEIVING DATA UNITS OVER A WIDEBAND CHANNEL - A multiple-input multiple output (MIMO) receiver includes circuitry to receive a MIMO transmission through a plurality of antennas over a channel comprising two or more 20 MHz portions of bandwidth. The MIMO transmission comprises a plurality of streams, each transmitted over a corresponding spatial channel and configured for reception by multiple user stations. The MIMO receiver also includes circuitry to simultaneously accumulate signal information within at least two or more of the 20 MHz portions of bandwidth. Each 20 MHz portion comprises a plurality of OFDM subcarriers. The MIMO receiver also includes circuitry to demodulate at least one of the steams using receive beamforming techniques. In this way, multi-user protocol data units can be received. | 02-26-2015 |
20150085761 | MILLIMETER-WAVE COMMUNICATION DEVICE AND METHOD FOR INTELLIGENT CONTROL OF TRANSMIT POWER AND POWER DENSITY - Embodiments of a millimeter-wave (mmW) communication device and methods for intelligent control of transmit power and power density are generally described herein. In some embodiments, a mmW base station includes a beamforming processor that is to configure a large-aperture array antenna for multi-beam transmissions at mmW frequencies to a plurality of user equipment (UE). The beamforming processor may allocate each UE a non-interfering spectral portion of a full channel bandwidth that is substantially less than the full channel bandwidth and perform multi-beam beamforming to concurrently direct a plurality of multi-user multiple-input multiple-output (MU-MIMO) antenna beams to the UEs for a concurrent transmission of data streams to the UEs within their allocated spectral portion in accordance with a transmit power allocation. | 03-26-2015 |