| Patent application number | Description | Published |
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| 20080225963 | Ultra-wideband communication systems and methods - Systems and methods of ultra-wideband communication are provided. In one embodiment, an ultra-wideband communication system divides a stream of data conveying symbols into a plurality of unspread substreams. A common spreading code is generated at the ultra-wideband transmitter, and each of the unspread substreams are spread using the common spreading code to form a plurality of spread substreams. The spread substreams are combined to form a composite signal that is transmitted. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims. | 09-18-2008 |
| 20080263425 | Turbo LDPC Decoding - An iterative low-density parity-check (LDPC) decoding system comprises a first shift register for storing bit estimates, a plurality of parity-check processing node banks configured for processing the bit estimates for generating messages, combiners configured for combining the messages with the bit estimates for generating updated bit estimates, and fixed permuters for permuting the updated bit estimates to facilitate storage and access of the bit estimates. A second shift register is provided for storing the messages, and a subtraction module subtracts messages generated a predetermined number of cycles earlier from the updated bit estimates. | 10-23-2008 |
| 20080298435 | Common Air Interface Supporting Single Carrier and OFDM - A matched filter is configured for matching an input signal to a plurality of programmable-length complementary Golay-code pairs. The matched filter includes a sequence of delay elements configured for delaying the input signal with respect to at least one delay vector. A sequence of programmable seed vector insertion elements is configured for multiplying the input signal and delayed versions of the input signal by a set of seed-vector values. At least one of the seed-vector values may be set to zero to facilitate processing Golay codes having different lengths. | 12-04-2008 |
| 20090041156 | UWB System Employing Gaussian Minimum Shift Key Modulation, Common Mode Signaling, and Beamforming - A multi-mode transmission system supporting OFDM and single-carrier signals is configured to perform interpolation and decimation such that the ratio of the interpolation factor to the decimation factor equals the ratio between the OFDM sampling rate and the single-carrier chip rate. A constant-envelope modulator comprises a π/4 fixed rotator, a π/2 continuous rotator, and in-phase and quadrature-phase analog Bessel filters. Frame formats and signaling protocols are provided for signal acquisition, synchronization, and tracking between wireless devices that employ different antenna configurations. Spreading gains are selected to compensate for different antenna gains such that the total gain (antenna gain plus spreading gain) is substantially equal for transmissions employing different beam patterns. | 02-12-2009 |
| 20090086619 | Ultra-Wideband Communication Protocol - A communication protocol for ultra-wideband communications is provided. The present invention provides compatibility and interoperability between ultra-wideband communications devices within various types of networks. In one embodiment, combined, or interleaved data frames having both high and low data transfer rate capability are provided. The low data transfer rate may be used for initial discovery of the type of network that is being accessed, and the high data transfer rate may be used to quickly transfer data within networks that have a high data transfer rate capability. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims. | 04-02-2009 |
| 20090094506 | MILLIMETER-WAVE COMMUNICATIONS FOR PERIPHERAL DEVICES - A wireless device couples an electronic device employing a wired-link protocol to, for example, a wireless personal area network (WPAN). The wireless device comprises a wired interface configured for coupling to the electronic device, a wired transceiver coupled to the wired interface, the at least one wired transceiver configured for functioning as a terminus of a wired link coupled to the electronic device, and a wireless transmitter or transceiver coupled to the wired transceiver and configured for functioning as a terminus of a wireless link in the WPAN. The wireless device may be configured for coupling a plurality of dissimilar wired devices together via a wireless link. | 04-09-2009 |
| 20090097533 | METHOD AND APPARATUS FOR SINGLE CARRIER SPREADING - A wireless device comprises a code-assignment module configured for assigning Golay codes to be used for spreading, a spreading module configured for spreading data with the Golay codes to produce a signal, wherein the Golay codes are randomly used to spread the data, and a transmitter configured for transmitting the signal. The wireless device may transmit a first beacon signal via a set of quasi-omni beam patterns, and a second beacon signal via a set directional beam patterns. The first beacon signal has a first transmission rate that is higher than the second beacon signal's the transmission rate. Extended Golay codes having zero periodic cross-correlation may be generated from a Golay code and a set of short sequences. A data block transmitted by the wireless device may comprise Golay codes and data portions, wherein every data portion is between two Golay codes and every Golay code is between two data portions. | 04-16-2009 |
| 20090100316 | METHOD AND APPARATUS FOR GENERATION AND USAGE OF EXTENDED GOLAY CODES - A wireless device comprises a code-assignment module configured for assigning Golay codes to be used for spreading, a spreading module configured for spreading data with the Golay codes to produce a signal, wherein the Golay codes are randomly used to spread the data, and a transmitter configured for transmitting the signal. The wireless device may transmit a first beacon signal via a set of quasi-omni beam patterns, and a second beacon signal via a set directional beam patterns. The first beacon signal has a first transmission rate that is higher than the second beacon signal's the transmission rate. Extended Golay codes having zero periodic cross-correlation may be generated from a Golay code and a set of short sequences. A data block transmitted by the wireless device may comprise Golay codes and data portions, wherein every data portion is between two Golay codes and every Golay code is between two data portions. | 04-16-2009 |
| 20090100317 | METHOD AND APPARATUS FOR SINGLE CARRIER AND OFDM SUB-BLOCK TRANSMISSION - A wireless device comprises a code-assignment module configured for assigning Golay codes to be used for spreading, a spreading module configured for spreading data with the Golay codes to produce a signal, wherein the Golay codes are randomly used to spread the data, and a transmitter configured for transmitting the signal. The wireless device may transmit a first beacon signal via a set of quasi-omni beam patterns, and a second beacon signal via a set directional beam patterns. The first beacon signal has a first transmission rate that is higher than the second beacon signal's the transmission rate. Extended Golay codes having zero periodic cross-correlation may be generated from a Golay code and a set of short sequences. A data block transmitted by the wireless device may comprise Golay codes and data portions, wherein every data portion is between two Golay codes and every Golay code is between two data portions. | 04-16-2009 |
| 20090109945 | METHOD AND APPARATUS FOR IMPROVED DATA DEMODULATION IN A WIRELESS COMMUNICATION NETWORK - A wireless network uses an improved frame structure to increase timing acquisition capabilities as well as reduction of spectral lines. In one aspect, the frame packet can be used to communicate the different modes of operation under which the packet was created. | 04-30-2009 |
| 20090109952 | METHOD AND APPARATUS FOR SIGNALING TRANSMISSION CHARACTERISTICS IN A WIRELESS COMMUNICATION NETWORK - A wireless network uses an improved frame structure to increase timing acquisition capabilities as well as reduction of spectral lines. In one aspect, the frame packet can be used to communicate the different modes of operation under which the packet was created. | 04-30-2009 |
| 20090109955 | METHOD AND APPARATUS FOR IMPROVED FRAME SYNCHRONIZATION IN A WIRELESS COMMUNICATION NETWORK - A wireless network uses an improved frame structure to increase timing acquisition capabilities as well as reduction of spectral lines. In one aspect, the frame packet can be used to communicate the different modes of operation under which the packet was created. | 04-30-2009 |
| 20090110031 | MILLIMETER WAVE BEACONING WITH DIRECTIONAL ANTENNAS - A wireless device comprises a code-assignment module configured for assigning Golay codes to be used for spreading, a spreading module configured for spreading data with the Golay codes to produce a signal, wherein the Golay codes are randomly used to spread the data, and a transmitter configured for transmitting the signal. The wireless device may transmit a first beacon signal via a set of quasi-omni beam patterns, and a second beacon signal via a set directional beam patterns. The first beacon signal has a first transmission rate that is higher than the second beacon signal's the transmission rate. Extended Golay codes having zero periodic cross-correlation may be generated from a Golay code and a set of short sequences. A data block transmitted by the wireless device may comprise Golay codes and data portions, wherein every data portion is between two Golay codes and every Golay code is between two data portions. | 04-30-2009 |
| 20090122715 | METHOD AND APPARATUS FOR CREATING BEAMFORMING PROFILES IN A WIRELESS COMMUNICATION NETWORK - A wireless communications network uses a beamforming process to increase signal quality as well as transmission capabilities and reduction of interference. An improved Golay sequence is also used in the wireless communications network. In one aspect, the processes can be used to communicate regardless of whether the system is on an OFDM mode or a single carrier mode. | 05-14-2009 |
| 20090125792 | METHOD AND APPARATUS FOR PREAMBLE CREATION AND COMMUNICATION IN A WIRELESS COMMUNICATION NETWORK - A wireless communications network uses a beamforming process to increase signal quality as well as transmission capabilities and reduction of interference. An improved Golay sequence is also used in the wireless communications network. In one aspect, the processes can be used to communicate regardless of whether the system is on an OFDM mode or a single carrier mode. | 05-14-2009 |
| 20090160707 | Beamforming in MIMO Systems - A beamforming method comprises transmitting a training sequence from a transmitter array employing a set of beamforming vectors from a beamforming codebook. A receive array employs a combining codebook to acquire channel state information from the received transmissions, and estimates a preferred beamforming vector and a preferred combining vector. At least the preferred beamforming vector (and, optionally, the preferred combining vector) is transmitted back to the transmitter array. | 06-25-2009 |
| 20090204874 | METHOD AND APPARATUS FOR SINGLE CARRIER AND OFDM SUB-BLOCK TRANSMISSION - A wireless device comprises a code-assignment module configured for assigning Golay codes to be used for spreading, a spreading module configured for spreading data with the Golay codes to produce a signal, wherein the Golay codes are randomly used to spread the data, and a transmitter configured for transmitting the signal. The wireless device may transmit a first beacon signal via a set of quasi-omni beam patterns, and a second beacon signal via a set directional beam patterns. The first beacon signal has a first transmission rate that is higher than the second beacon signal's the transmission rate. Extended Golay codes having zero periodic cross-correlation may be generated from a Golay code and a set of short sequences. A data block transmitted by the wireless device may comprise Golay codes and data portions, wherein every data portion is between two Golay codes and every Golay code is between two data portions. | 08-13-2009 |
| 20090232240 | MULTI-RESOLUTION BEAMFORMING IN MIMO SYSTEMS - Certain aspects of the present disclosure relate to methods for beamforming that achieve beamforming optimality criterions. Some proposed beamforming techniques are based on antenna directions with multiple resolutions. | 09-17-2009 |
| 20090232245 | MULTI-RESOLUTION BEAMFORMING BASED ON CODEBOOKS IN MIMO SYSTEMS - Certain aspects of the present disclosure relate to methods for beamforming that achieve beamforming optimality criterions. Some proposed beamforming techniques are based on antenna directions with multiple resolutions. | 09-17-2009 |
| 20090238240 | SINGLE-CARRIER BURST STRUCTURE FOR DECISION FEEDBACK EQUALIZATION AND TRACKING - Certain aspects of the present disclosure relate to a method for employing a special format for transmitting data blocks which allows parallel equalizations at a receiver. By applying parallel equalization operations, a clock at the receiver can operate at a fraction of the input signal's data rate, which is more practical in the case of very high data rates while power dissipation is also reduced. | 09-24-2009 |
| 20090276682 | TURBO LDPC DECODING - An iterative low-density parity-check (LDPC) decoding system comprises a first shift register for storing bit estimates, a plurality of parity-check processing node banks configured for processing the bit estimates for generating messages, combiners configured for combining the messages with the bit estimates for generating updated bit estimates, and fixed permuters for permuting the updated bit estimates to facilitate storage and access of the bit estimates. A second shift register is provided for storing the messages, and a subtraction module subtracts messages generated a predetermined number of cycles earlier from the updated bit estimates. | 11-05-2009 |
| 20090279448 | QUASI-OMNI TRAINING IN CHANNEL TIME ALLOCATION PERIOD - Certain aspects of the present disclosure relate to a method for association in contention access periods and to a method for multi-cycle training in channel time allocation periods. | 11-12-2009 |
| 20090279525 | ASSOCIATION IN CONTENTION ACCESS PERIOD - Certain aspects of the present disclosure relate to a method for association in contention access periods and to a method for multi-cycle training in channel time allocation periods. | 11-12-2009 |
| 20090279590 | SPREAD-SPECTRUM CODING OF DATA BURSTS - Certain aspects of the present disclosure relate to a method for generating spread-spectrum coded signals for transmission in a wireless communication system, and particularly for generating spread sequences of data with spreading codes that facilitate computationally efficient frequency-domain processing at a receiver. | 11-12-2009 |
| 20100027587 | SYSTEMS AND METHODS FOR HIGH DATA RATE ULTRA WIDEBAND COMMUNICATION - A high data rate UWB system implements a frame structure that uses a connected set of m-sequences comprising the lowest possible cross-correlation and perfect, or near perfect autocorrelation. Each m-sequence can be used to identify a different piconet A very efficient code matched filter can then be used to decode the frames and achieve synchronization with a piconets. | 02-04-2010 |
| 20100054199 | COMMON-MODE PARTITIONING OF WIDEBAND CHANNELS - Certain aspects of the present disclosure relate to a method for allocating a plurality of logical channels within each wideband channel specified by the IEEE 802.15.3c standard. Each logical channel can utilize the same wideband channel, but the logical channel can also utilize a narrowband channel (i.e., a low data rate (LDR) channel) for control and signaling. The logical channel may function as a common mode channel for multi-mode operations. A piconet controller (PNC) within a piconet can utilize the LDR for beaconing, association, and for assigning Channel Time Allocations (CTAs). Inside a CTA period, multiple devices in the piconet can communicate using a single-carrier mode, an OFDM mode, or some other mode. | 03-04-2010 |
| 20100061320 | COMMON MODE AND UNIFIED FRAME FORMAT - Certain aspects of the present disclosure relate to a method for generating a frame structure that can be used with multiple transmission schemes, such as a Single Carrier (SC) transmission scheme and an Orthogonal Frequency Division Multiplexing (OFDM) transmission scheme. | 03-11-2010 |
| 20100086076 | CODES AND PREAMBLES FOR SINGLE CARRIER AND OFDM TRANSMISSIONS - Certain aspects of the present disclosure relate to a method for generating a frame structure suitable for use in both single carrier (SC) and Orthogonal Frequency Division Multiplexing (OFDM) transmission modes, while ensuring accurate channel estimation at a receiver. | 04-08-2010 |
| 20100088573 | METHOD AND APPARATUS FOR HIGH SPEED STRUCTURED MULTI RATE LOW DENSITY PARITY CHECK CODES - Certain aspects of the present disclosure relate to a method for designing structured multi-rate low-density parity-check (LDPC) codes. These LDPC codes can be also adapted to support efficient encoding. | 04-08-2010 |
| 20100118716 | METHOD AND APPARATUS FOR DIRECTIONAL CLEAR CHANNEL ASSESSMENT IN A WIRELESS COMMUNICATIONS SYSTEM - A method of communication is provided. The method includes detecting at least a portion of a preamble of a packet transmitted by a first device by sweeping over a plurality of receive directions; receiving and decoding a header of the packet based on a first receive direction to identify that the first device had transmitted the packet; and completing reception of the packet based on a second receive direction. An apparatus for performing the method is also disclosed. | 05-13-2010 |
| 20100118749 | METHOD AND APPARATUS FOR DIRECTIONAL CHANNEL ACCESS IN A WIRELESS COMMUNICATIONS SYSTEM - A method of wireless communications is provided. The method includes detecting at least a portion of a preamble of a packet transmitted by a first device by sweeping over a plurality of receive directions; receiving and decoding a header of the packet based on a first receive direction to identify that the first device had transmitted the packet; and completing reception of the packet based on a second receive direction. An apparatus for performing the method is also disclosed. | 05-13-2010 |
| 20100118802 | METHOD AND APPARATUS FOR DIRECTIONAL ASSOCIATION IN A WIRELESS COMMUNICATIONS SYSTEM - A method of wireless communications is provided. The method includes transmitting, from the first device to the second device, at least one association request having a plurality of packets, each packet being respectively transmitted in a different direction; detecting an association response from the second device; and determining a preferred first device to second device direction of transmission based on the association response. An apparatus for performing the method is also disclosed. | 05-13-2010 |
| 20100118835 | METHOD AND APPARATUS FOR CHANNEL ACCESS IN A WIRELESS COMMUNICATIONS SYSTEM - A method of wireless communications is provided. The method includes transmitting a channel time allocation request from a first device to a second device, wherein the channel time allocation request comprises a list of devices to be trained by the first device; receiving a channel time allocation granted by the second device; and transmitting, from the first device, at least one training packet to at least one device in the list of devices to be trained during the channel time allocation granted by the second device. An apparatus for performing the method is also disclosed. | 05-13-2010 |
| 20100157907 | METHOD AND APPARATUS FOR SIGNALING TRANSMISSION CHARACTERISTICS IN A WIRELESS COMMUNICATION NETWORK - A wireless network uses an improved frame structure to increase timing acquisition capabilities as well as reduction of spectral lines. In one aspect, the frame packet can be used to communicate the different modes of operation under which the packet was created. | 06-24-2010 |
| 20100174964 | SYSTEMS AND METHODS FOR A TURBO LOW-DENSITY PARITY-CHECK DECODER - A method for forming a plurality of parity check matrices for a plurality of data rates for use in a Low-Density Parity-Check (LDPC) decoder, comprises establishing a first companion exponent matrix corresponding to a first parity check matrix for a first data rate, and partitioning the first parity check matrix and the first companion exponent matrix into sub-matrices such that the first parity check matrix is defined using a cyclical shift of an identity matrix. | 07-08-2010 |
| 20100272154 | SPREAD-SPECTRUM MODULATION AND DEMODULATION - Certain aspects of the present disclosure relate to a method for modulating and demodulating a spread-spectrum data stream using multiple generalized Golay codes. | 10-28-2010 |
| 20100272157 | SPREAD SPECTRUM ENCODING AND DECODING - Certain aspects of the present disclosure relate to a method for generating spread-spectrum coded signals for transmission in a wireless communication system, and for efficient despreading at a receiver. | 10-28-2010 |
| 20100272158 | SPREAD-SPECTRUM CODS GENERATION - Certain aspects of the present disclosure relate to a method for generating Golay codes and generalized Golay codes in a wireless communication system, and for efficient spreading at a transmitter and despreading at a receiver. | 10-28-2010 |
| 20100281328 | HIGH SPEED LOW DENSITY PARITY CHECK CODES ENCODING AND DECODING - Certain aspects of the present disclosure relate to a method for generating a single rate or multi-rate highly structured low density parity check, encoding a data stream with the generated LDPC matrix for transmission in a wireless communication system, and for efficient LDPC decoding at a receiver. | 11-04-2010 |
| 20100284444 | METHOD AND APPARATUS FOR PACKET ACQUISITION - Certain aspects of the present disclosure relate to a method for acquisition of a received spread spectrum signal transmitted over a wired or wireless medium. | 11-11-2010 |
| 20100287438 | METHOD AN APPARATUS FOR LOW DENSITY PARITY CHECK CODES ENCODING AND DECODING - Certain aspects of the present disclosure relate to a method for generating a single rate or multi-rate highly structured low density parity check, encoding a data stream with the generated LDPC matrix for transmission in a wireless communication system, and for efficient LDPC decoding at a receiver. | 11-11-2010 |
| 20100309958 | METHOD AND APPARATUS FOR CONTINUOUS PHASE MODULATION PREAMBLE ENCODING AND DECODING - Certain aspects of the present disclosure relate to a method for generating single carrier signals with spread-spectrum coded preambles using constant envelope 2-CPM modulation for transmission in a wireless communication system, and for efficient despreading method at a receiver. | 12-09-2010 |
| 20100309959 | METHOD AND APPARATUS FOR CONSTANT ENVELOPE DEMODULATION - Certain aspects of the present disclosure relate to a method for demodulating CPM modulated signals transmitted in a wired or wireless communication system using a linear modulation model consisting of a linear superposition of time pulses modulated using pseudo-PSK pulses. | 12-09-2010 |
| 20100310009 | METHOD AND APPARATUS FOR CONSTANT ENVELOPE MODULATION - Certain aspects of the present disclosure relate to a method for modulating single carrier signals using constant envelope 2-CPM modulation and quasi-constant envelope filtered continuously rotated pseudo-PSK modulation in a wireless communication system. | 12-09-2010 |
| 20110110340 | Method and Apparatus for Directional Centralized Contention Based Period in a Wireless Communication System - A method of communication includes allocating a portion of a superframe centralized contention based period where the access method is based on directional ALOHA. The centralized contention based period is divided into equal time slots, and each sequential set of N time slots forms a time cycle. During a time cycle, a wireless device listens for requests from other wireless devices while it changes its receiving direction from one time slot to another. | 05-12-2011 |
| 20110110457 | Method and Apparatus for a Single-Carrier Wireless Communication System - A method of communication comprises partitioning a single-carrier data stream into equal-size blocks, and partitioning each block into a plurality of equal-size sub-blocks. A first set of cyclic prefixes and/or postfixes is inserted into the blocks to allow a linear convolution of a frequency-selective multipath channel having a long delay spread to be modeled as a circular convolution at a receiver. A second set of cyclic prefixes and/or postfixes is inserted into the sub-blocks to allow a linear convolution of a frequency-selective multipath channel having a short delay spread to be modeled as a circular convolution at the receiver. Upon receiving a transmitted data frame from the multipath channel, the receiver measures a link quality index (LQI) of a short channel impulse response; and selects block-by-block equalization or sub-block by sub-block equalization based on the LQI. | 05-12-2011 |
