Patent application number | Description | Published |
20080212563 | Method And Apparatus For Synchronizing Wireless Receiver | 09-04-2008 |
20080219201 | Method of Clustering Devices in Wireless Communication Network - In a wireless communication network ( | 09-11-2008 |
20080259859 | Spectrum Management in Dynamic Spectrum Access Wireless Systems - A plurality of MAC/PHY stacks is adapted to support wireless devices. A superframe structure includes a preamble and a superframe initialization header. | 10-23-2008 |
20080259897 | Method and Arrangement for Wireless Communication of Signals in a Mr System - A method and an arrangement for uni- or bidirectional wireless communication of signals or data especially in a reflective environment like a MR imaging system, between at least one first transmitter and/or receiver unit ( | 10-23-2008 |
20080279293 | Coded Orthogonal Frequency Division Multiplexing Method and Apparatus - A method and apparatus for transmitting and receiving data via guard tones are described. The information bits are coded by convolutional encoder ( | 11-13-2008 |
20080299931 | System, Apparatus, and Method for Multi-Band Ofdm Systems with Receiver Antenna Selection Per Sub-Band - The present invention provides a system ( | 12-04-2008 |
20080304607 | System, Apparatus, and Method for a Robust Synchronization Scheme for Digital Communication Systems - A synchronization sequence (preamble) that is known to the receiver forms as an integral part of packet-based digital communication systems. The first operation in such digital communication systems is the detection of the beginning of a valid signal (packet). The present invention provides a system, apparatus, and method for a scheme to robustly detect the preamble. The scheme of the present invention has the following advantages: it is robust to noise and interference, it provides the frequency error directly without any additional computation, it provides information that is necessary to position the FFT window for an OFDM based modulation, it provides a real part of the peak that can be used for frame synchronization, and finally, it provides the peak for burst detection purposes. | 12-11-2008 |
20080310519 | System, Apparatus, and Method for Single-Carrier Block Transmission with Adaptive Guard Interval - The system, apparatus and method of the present invention provides a single carrier block transmission with guard interval as a means of communications over multi-path channels that enables frequency domain equalization, and therefore, has many of the advantages of OFDM, but does not have some of the drawbacks such as high PAPR and the need for high resolution ADCs. While the use of guard intervals in single carrier communications enables low complexity detection of the signal, it reduces bandwidth efficiency. The present invention improves the bandwidth efficiency by adjusting the length of the guard interval adaptively. Also, by allowing both time-domain and frequency domain equalizations, besides improving bandwidth efficiency, the inventions allows for great flexibility in receiver design. | 12-18-2008 |
20090052567 | SYNCHRONIZATION SEQUENCE WITH TONE NOTCHING IN OFDM SYSTEMS - The present invention is a system, apparatus, and method for current MB-OFDM systems to design a time-domain sync sequence regarding DAA that (1) minimizes change to the current sync sequence, and (2) maintains the robustness of synchronization. Two tone-notching embodiments are provided for sync sequence design in the preamble when OFDM systems require detect-and-avoid (DAA) ability. The receiver needn't be aware of the change of sync sequence at the transmitter and can still use the original sync sequence. The design can be used in both DAA and non-DAA transmission modes. | 02-26-2009 |
20090185641 | METHOD AND SYSTEM FOR DETECTING NARROWBAND SIGNALS USING A RECEIVER WITH A WIDEBAND FRONTEND | 07-23-2009 |
20090268830 | SYSTEM AND METHOD FOR DETECTING TEMPORARILY UNUSED BANDWIDTH IN THE RF SPECTRUM | 10-29-2009 |
20090303907 | PREAMBLE STRUCTURE FOR ENABLING MULTI-MODE WIRELESS COMMUNICATIONS - A method for generating preamble structures to be used in multi-mode wireless communication systems. The method includes generating a basic element sequence in a predefined length, wherein the basic element sequence has a circularly orthogonal property; generating a type-A preamble by repeating the basic element sequence a number of predefined times; and generating a type-B preamble by adding respective values of real parts to values of imaginary parts of elements in the type-A preamble. The type-A preamble and type-B preamble are cross-correlated. | 12-10-2009 |
20090323610 | BONDING ADJACENT TV BANDS, SUB-CARRIER ALLOCATION, DATA BURST DEFINITION AND SPREAD OFDMA IN A PHYSICAL LAYER FOR 802.22 WRAN COMMUNICATION SYSTEMS - A method and system of calculating debt service capacity of a loan applicant includes capturing, indexing, reclassifying and grouping transaction data and profile data of the loan applicant. Next, capturing a loan structure, risk factors, financial variables and reconciliation rules and finally using the aforementioned and loan applicants' data and cash flow projections to calculate loan applicants' debt service capacity with time value of money calculations. | 12-31-2009 |
20100002757 | SYSTEM AND METHOD FOR IMPROVED FREQUENCY/PHASE ERROR TRACKING IN HIGH-SPEED HIGH-FREQUENCY COMMUNICATION - A single carrier modulation scheme suitable for use in high frequency communication systems is provided that achieves improved residual frequency error and phase noise estimation. At a transmitter, cyclically orthogonal constant amplitude pilot signals are inserted at the beginning (or end) of a plurality of SCBT blocks of a block coded data stream. At a receiver, a phase rotation of the received data stream is determined to remove a residual frequency error or to estimate the phase noise. | 01-07-2010 |
20100020732 | PHYSICAL LAYER SUPERFRAME, FRAME, PREAMBLE AND CONTROL HEADER FOR IEEE 802.22 WRAN COMMUNICATION SYSTEMS - The present invention provides a system ( | 01-28-2010 |
20100040084 | SYSTEM AND METHOD FOR EFFICIENT TRANSMISSION OF MULTIMEDIA AND DATA - A system and method for efficient transmission of different types of source data in the same packet, hence, enabling efficient transmission of multimedia and data content with unequal error protection are provided. The present disclosure defines a packet structure where the packet consists of a number of segments or payloads. The packet includes a field indicative of a number of payloads included in the packet; and at least one data field for each payload in the packet, the at least one data field defining at least one characteristic of the payload. The at least one data field includes a length of the payload, modulation and coding scheme, existence of a frame check sum (FCS), and existence of a midamble. The at least one data field may further include a continuation element indicative of whether two consecutive payloads are portions of a same data frame. | 02-18-2010 |
20100080318 | SYSTEM AND METHOD FOR IMPROVED FREQUENCY ESTIMATION FOR HIGH-SPEED COMMUNICATION - A system and method is provided for improved frequency error estimation in a high-frequency data communication system. In an embodiment, a method for providing improved frequency error estimation comprises performing encoding, interleaving and symbol mapping on original information bits to form a data stream of modulated information symbols; inserting pilot symbols into the data stream at progressively longer time intervals and transmitting the data stream as a radio signal from a data transmitter to a receiver. The method further comprises using the received pilot symbols, transmitted at progressively longer time intervals to perform frequency error estimation. In certain embodiments, the received pilot symbols may also be used to perform improved channel estimation updates. | 04-01-2010 |
20100124294 | COST-EFFECTIVE PREAMBLE STRUCTURE FOR HIGH-SPEED COMMUNICATION OF PACKETIZED SYSTEMS - The system ( | 05-20-2010 |
20100146363 | METHOD AND SYSTEM OF SINGLE CARRIER BLOCK TRANSMISSION WITH PARALLEL ENCODING AND DECODING - A Single Carrier Block Transmission (SCBT) system employs an inherently parallel approach to error correction processing. At the transmission system ( | 06-10-2010 |
20100157066 | DETECTION OF THE PRESENCE OF TELEVISION SIGNALS EMBEDDED IN NOISE USING CYCLOSTATIONARY TOOLBOX - A method for detecting the presence of a television signal embedded in a received signal including the television signal and noise is disclosed. Either first-order or second order cyclostationary property of the signals may be used for their detection. When the first-order cyclostationary property is used, the following method is used, the method comprising the steps of upsampling the received signal by a factor of N, performing a synchronous averaging of a set of M segments of the upsampled received signal, performing an autocorrelation of the signal; and detecting the presence of peaks in the output of the autocorrelation function. When the second order cyclostationary property of the signal is used, the method comprising the steps of delaying the received signal by a fixed delay (symbol time), multiplying the received signal with the delayed version, looking for a tone (single frequency) in the output. | 06-24-2010 |
20100189053 | COORDINATION IN WIRELESS NETWORKS HAVING DEVICES WITH DIFFERENT PHYSICAL LAYER TRANSMISSION SCHEMES - A wireless network ( | 07-29-2010 |
20100203911 | METHODS AND SYSTEMS FOR EXTENDING RANGE AND ADJUSTING BANDWIDTH FOR WIRELESS NETWORKS - A Communications base-station configured to operate as a hub in a wireless network and provide communication services to a set of remote customer devices using a wireless protocol is disclosed. The communications base-station includes an antenna array having a plurality of antennae arranged in a fashion as to enable the antenna array to transmit and receive wireless signals in both a substantially omnidirectional and non-omnidirectional pattern, a physical layer (PHY) device coupled to the antenna array and configured to transmit and receive wireless signals and a media access control (MAC) device coupled to the PHY device and configured to direct the antenna array to concurrently provide beamformed wireless signals to a first customer device and omnidirectional wireless signals to second customer device. | 08-12-2010 |
20100265990 | METHOD AND SYSTEM OF WIRELESS DEVICE DISCOVERY IN A WIRELESS NETWORK EMPLOYING DIRECTIONAL ANTENNAS - A wireless device ( | 10-21-2010 |
20100272203 | SINGLE-CARRIER BLOCK TRANSMISSION WITH TRELLIS CODED MODULATION (TCM), MULTI-LEVEL CODED MODULATION (MLCM) AND BIT-INTERLEAVED MLCM (BIMLCM) - The system ( | 10-28-2010 |
20100329366 | PHYSICAL LAYER CONVERGENCE PROTOCOL (PLCP) PACKET STRUCTURE FOR MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEMS - A physical layer convergence protocol (PLCP) data structure ( | 12-30-2010 |
20110007828 | TECHNIQUES FOR MULTIPLE-SUBCARRIER JOINT PRECODING | 01-13-2011 |
20110033004 | DUAL CARRIER MODULATION PRECODING | 02-10-2011 |
20120155556 | DIGITAL TELEVISION TRANSMISSION WITH ERROR CORRECTION - A multimedia stream system includes a transmitter and a multimedia data stream receiver. The transmitter at receives raw multimedia data and generates uniform error correction data and a standard multimedia data stream. The multimedia data stream receiver receives the standard multimedia data stream containing encoded multimedia data and the uniform error correction data for error correction of encoded multimedia data. | 06-21-2012 |
20120176041 | METHOD OF CONTROLLING LIGHT DISTRIBUTION IN A SPACE INCLUDING MULTIPLE INSTALLED LIGHT SOURCES AND AN EXTERNAL LIGHT SOURCE - This invention relates to a method and system for controlling light distribution in a space including multiple installed light sources and an external light source. The luminance level of light from said light sources is measured at different measuring areas within the space. A weighed luminance level is determined for each of the measuring areas based on the measured luminance levels, where the weighted luminance level indicates the contribution from the light sources to the measured luminance level at the different measuring areas. This weighed luminance level is used as a tuning parameter for tuning the emitted light at the installed light sources such that the weighed luminance level at each of the different measuring areas substantially matches a pre-defined target luminance level at the different measuring areas. | 07-12-2012 |
20120299486 | Light level control for building illumination - The present invention deals with light level control for building illumination by controlling electric lights and windows treatment. In an embodiment, the light level is controlled by a control system ( | 11-29-2012 |
20130276371 | AMBIENT LIGHT CONTROL - The invention relates to a control device ( | 10-24-2013 |
20140021866 | ADAPTIVE INTEGRATED DAYLIGHT AND ELECTRIC LIGHT CONTROL WITH MULTI-SENSOR FOR CONTROLLED-LIGHT DISTRIBUTION - A system and a method for controlling light distribution in a space including multiple installed light sources ( | 01-23-2014 |
20140209254 | OPEN-LOOP CLOSED-LOOP INTEGRATED DAYLIGHT AND ARTIFICIAL LIGHT CONTROL WITH MULTIPOINT SENSOR CALIBRATION - A system and method of controlling light distribution in a space including an installed light source, an external light source, at least one blind(s) for a window in the space, a lighting control unit and a daylight/blind control unit, the method includes, in the lighting control unit, estimating task illuminances from the installed light source and the external light source at a plurality of measuring areas within the space, determining an intensity level of each of the installed light source based on the estimated illuminances; and determining a first positioning of the blinds according to predetermined requirements and/or measurements, in the daylight/blind control unit, receiving the plurality of measuring areas data within the space, determining a second positioning of the blinds according to predetermined requirements, selecting either the first or second positioning of the blinds to provide optimal daylight comfort, glare prevention and view. | 07-31-2014 |
20150073750 | FAULT DETECTION, LOCALIZATION AND PERFORMANCE MONITORING OF PHOTOSENSORS FOR LIGHTING CONTROLS - A method and system for monitoring sensors of a lighting control system. The method comprises performing a training of a plurality of sensors of the lighting control system ( | 03-12-2015 |