Patent application number | Description | Published |
20080198943 | SYSTEMS AND METHODS FOR LATTICE ENUMERATION-AIDED DETECTION - Embodiments provide systems and methods for improved multiple-input, multiple-output (MIMO) detection comprising generating at least one list of candidate vectors by employing lattice enumeration which approximates hyperellipsoid detection search space and calculating a reliability of the candidate vectors. At least one advantage to embodiments is that improved detection occurs because detection can be performed in a search space defined by the eigenvectors (which define the general shape of an ellipsoid/hyperellipsoid, depending upon number of dimensions) and eigenvalues (which provide the appropriate scaling in each direction of the eigenvectors) of the effective channel. | 08-21-2008 |
20080212461 | TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM - Embodiments provide a transform-based method for representing steering matrices in transmit beamforming for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. Beamforming embodiments generate a transform-based representation of steering matrices for at least a subset of sub-carriers for which channel information is known. In some embodiments, a beamformer is able to receive transform matrices information for at least a subset of channel sub-carriers, and generate corresponding channel sub-carrier steering matrices. Some embodiments of a beamformee are able to map at least a subset of channel sub-carrier steering matrices to corresponding transform matrices information prior to transmitting the transform matrix information to a beamformer. Other embodiments of a beamformer are able to receive channel information for at least a subset of sub-carriers of a channel, and compute a transform-based representation of a steering matrix for each sub-carrier for which channel information is known. | 09-04-2008 |
20080232491 | SYSTEMS AND METHODS FOR LOW-COMPLEXITY MIMO DETECTION WITH ANALYTICAL LEAF-NODE PREDICTION - Systems and methods for providing multiple-input multiple-output (MIMO) detection, comprising a leaf node predictor for receiving a processed communications stream, computing at least one channel metric corresponding to the communications stream for a given channel realization by optimizing a predetermined probability, and analytically generating at least one parameter to output, which at least one parameter corresponds to at least one predicted best leaf node candidate for the given channel realization. The leaf-node predictor may generate, in real-time and without using a look-up table, at least one parameter directly from a given channel metric. Some embodiments analytically generate at least one parameter value for use by a MIMO detector corresponding to a channel metric and store the generated at least one parameter value and corresponding channel metric in a look-up table. | 09-25-2008 |
20080240272 | SYSTEMS AND METHODS FOR N-DIMENSIONAL LEAF-NODE PREDICTION FOR MIMO DETECTION - Embodiments achieve favorable performance-complexity trade-offs in MIMO detection for three or more channel inputs. Some embodiments describe systems and methods comprising a leaf node predictor for receiving a processed communications stream, determining at least one channel metric corresponding to the communications stream for a given channel realization, and generating at least three instructions to output, which at least one instruction corresponds to at least one predicted best leaf node candidate for the given channel realization. Further embodiments alternatively describe systems and methods which enumerate N | 10-02-2008 |
20080273497 | Handover for DVB-H - A method of wireless handover in a broadcast network (FIGS. | 11-06-2008 |
20080310538 | Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing - The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system ( | 12-18-2008 |
20090279634 | STTD ENCODING FOR PCCPCH - A circuit is designed with a measurement circuit ( | 11-12-2009 |
20100079334 | LOW-COMPLEXITY TIGHTLY-COUPLED INTEGRATION FILTER FOR SENSOR-ASSISTED GNSS RECEIVER - Embodiments of the invention provide a blending filter based on extended Kalman filter (EKF), which optimally integrates the IMU navigation data with all other satellite measurements tightly-coupled integration filter. This blending filter can be easily implemented with minor modification to the position engine of stand-alone GNSS receiver. Provided is a low-complexity tightly-coupled integration filter for sensor-assisted global navigation satellite system (GNSS) receiver. The inertial measurement unit (IMU) contains inertial sensors such as accelerometer, magnetometer, and/or gyroscopes Embodiments also include method for pedestrian dead reckoning (PDR) data conversion for ease of GNSS/PDR integration. The PDR position data is converted to user velocity measured at the time instances where GNSS position/velocity estimates are available. | 04-01-2010 |
20100091821 | WIRELESS COMMUNICATIONS SYSTEM WITH SECONDARY SYNCHRONIZATION CODE BASED ON VALUES IN PRIMARY SYNCHRONIZATION CODE - A wireless communication system. The system comprises transmitter circuitry (BST | 04-15-2010 |
20100111138 | Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing - The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function, the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones. | 05-06-2010 |
20100180173 | Hybrid-ARQ (HARQ) with Scrambler and Diversity - Embodiments of the invention provide a system and method of hybrid automatic repeat-request (HARQ) processing. A viterbi decoder is coupled to and follows a descrambler. After the signal has been de-scrambled, it can be stored in a memory in case it needs to be recombined with another packet. This means that the log-likelihood ratios LLRs for each transmitted bit are stored in memory using a finite number of bits (for example, between 4 and 12 bits). If the packet that is currently being processed contains retransmitted information, then the de-scrambled output stored from a previous packet containing the same information can be loaded and combined with the current packet. | 07-15-2010 |
20100202494 | ULTRA WIDEBAND MODULATION FOR BODY AREA NETWORKS - A symbol modulation system applicable to a body area network is disclosed herein. The symbol modulation system includes a symbol mapper. The symbol mapper is configured to determine a time within a predetermined symbol transmission interval at which a transmission representative of the symbol will occur. The time is determined based on a value of a symbol and a value of a time-hopping sequence. The time is selected from a plurality of symbol value based time slots, and a plurality of time-hopping sequence sub-time-slots within each symbol value based time slot. The symbol mapper is configured to generate a single guard interval within the symbol transmission interval. The single guard interval is positioned to terminate the symbol transmission interval. | 08-12-2010 |
20100260162 | PHY LAYER PARAMETERS FOR BODY AREA NETWORK (BAN) DEVICES - In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz. | 10-14-2010 |
20100260236 | PHY LAYER PPDU CONSTRUCTION FOR BODY AREA NETWORK (BAN) DEVICES - In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to construct a physical-layer service data unit (PSDU) based on a concatenate block, an insert shortened bits block, a Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoder, a remove shortened bits block, an add pad bits block, a spreader, a bit interleaver, a scrambler, and a symbol mapper. | 10-14-2010 |
20100261429 | PHY LAYER OPTIONS FOR BODY AREA NETWORK (BAN) DEVICES - In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment using M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK. Also, the PHY layer uses a constant symbol rate for BAN packet transmissions. | 10-14-2010 |
20110051706 | WIRELESS NETWORK SYSTEM - A integrated circuit includes logic configured to support smart-utility-network communication using an integer number of data bits per symbol for 96, 48, 24, 12, and 4 data subcarriers across IFFT sizes of 128, 64, 32, 16, and 8. | 03-03-2011 |
20110051747 | SHORT AND LONG TRAINING FIELDS - A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN. | 03-03-2011 |
20110051845 | FREQUENCY DIVERSITY AND PHASE ROTATION - An integrated circuit includes logic configured to encode one or more first data symbols in one or more first sub-carriers as one or more second data symbols in one or more second sub-carriers of a smart-utility-network communication. | 03-03-2011 |
20110064071 | WIRELESS COMMUNICATIONS SYSTEM WITH SECONDARY SYNCHRONIZATION CODE BASED ON VALUES IN PRIMARY SYNCHRONIZATION CODE - A wireless communication system. The system comprises transmitter circuitry (BST | 03-17-2011 |
20110069707 | PACKET DETECTION AND COARSE SYMBOL TIMING FOR ROTATED DIFFERENTIAL M-ARY PSK MODULATED PREAMBLE SIGNAL - A packet detection and coarse symbol timing recovery system for preamble signal modulated with rotated differential M-ary phase shift key (PSK) modulation includes a differential detection unit, to provide a symbol signal responsive to a received signal. A preamble sequence correlator performs a preamble sequence correlation on the symbol signal to produce a correlator signal. A metric calculation unit performs a metric calculation on the correlator signal to produce a metric. A packet detection unit determines that a packet is detected and produces a sample index. A coarse symbol timing unit finds a peak of the calculated metric signal outputs a sample index for the peak as coarse symbol timing information. The sample indexes are used in processing a physical layer convergence procedure (PLCP) header and physical layer service data unit (PSDU) block. | 03-24-2011 |
20110176642 | Systems and Methods for Low-Complexity MIMO Detection Using Leaf-Node Prediction via Look-up Tables - A method for building a look-up table for a receiver in a multiple-input multiple-output (MIMO) detection system simulates a MIMO detector over many channel realizations, tracks channel metric and parameter values used for each channel realization resulting from such simulating, and stores, in a look-up table, best values of the tracked values used for a particular channel metric. | 07-21-2011 |
20110199972 | Wireless Chip-to-Chip Switching - Embodiments of the invention provide a system and method for chip to chip communications in electronic circuits. A router or switch receives data packets at input port ASICs. A routing table on the input port ASIC or on a routing ASIC is used to identify a destination port ASIC based upon header information in the data packet. The data packet is transmitted from the input port ASIC to the destination port ASIC using millimeter wave signals that are transmitted across a waveguide or a wireless interface. | 08-18-2011 |
20110200148 | SYSTEMS AND METHODS FOR LOW-COMPLEXITY MIMO DETECTION WITH ANALYTICAL LEAF-NODE PREDICTION - Systems and methods for providing multiple-input multiple-output (MIMO) detection, comprising a leaf node predictor for receiving a processed communications stream, computing at least one channel metric corresponding to the communications stream for a given channel realization by optimizing a predetermined probability, and analytically generating at least one parameter to output, which at least one parameter corresponds to at least one predicted best leaf node candidate for the given channel realization. The leaf-node predictor may generate, in real-time and without using a look-up table, at least one parameter directly from a given channel metric. Some embodiments analytically generate at least one parameter value for use by a MIMO detector corresponding to a channel metric and store the generated at least one parameter value and corresponding channel metric in a look-up table. | 08-18-2011 |
20110255453 | SYSTEM AND METHOD FOR SCRAMBLING AND TIME-HOPPING - A system and method for scrambling and time-hopping in an ultra-wideband wireless network. In one embodiment, a wireless device includes a symbol mapper and a dynamic chip scrambler. The dynamic chip scrambler is configured to scramble each of a plurality of consecutive bursts of a time-hopped packet according to a pseudo-random scrambling sequence that varies from burst to burst. | 10-20-2011 |
20120045017 | TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM - Embodiments provide a transform-based method for representing steering matrices in transmit beamforming for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. Beamforming embodiments generate a transform-based representation of steering matrices for at least a subset of sub-carriers for which channel information is known. In some embodiments, a beamformer is able to receive transform matrices information for at least a subset of channel sub-carriers, and generate corresponding channel sub-carrier steering matrices. Some embodiments of a beamformee are able to map at least a subset of channel sub-carrier steering matrices to corresponding transform matrices information prior to transmitting the transform matrix information to a beamformer. Other embodiments of a beamformer are able to receive channel information for at least a subset of sub-carriers of a channel, and compute a transform-based representation of a steering matrix for each sub-carrier for which channel information is known. | 02-23-2012 |
20120106611 | PHASE LOCKING LOOP - A phase-locking loop (PLL) for use with orthogonal frequency division multiplexed signals. In one embodiment, a wireless receiver includes a PLL is configured to reduce phase and frequency divergence between the wireless receiver and a transmitter of a packet received by the wireless receiver. The PLL includes a loop bandwidth controller. The loop bandwidth controller is configured to set a bandwidth of the PLL to a first value for reception of an initial symbol of the packet. The loop bandwidth controller is configured to reduce the bandwidth of the PLL over a number of symbols preceding an initial header of the packet. | 05-03-2012 |
20120140858 | FINE SYMBOL TIMING ESTIMATION - Systems and methods for fine symbol timing estimation are disclosed herein. In one embodiment, a wireless receiver includes a differential detector, a correlator, a coarse symbol timing estimator, and a fine symbol timing estimator. The differential detector is configured to detect phase differences in a received preamble signal modulated using differential phase shift keying. The correlator is configured to correlate symbol values output by the differential detector against a reference sequence. The coarse symbol timing estimator is configured to generate a coarse symbol timing estimate, and to generate a coarse timing sample symbol index value corresponding to the coarse symbol timing estimate. The fine symbol timing estimator is configured to generate a fine symbol timing estimate that is more accurate than the coarse symbol timing estimate based on the coarse timing sample symbol index value and correlation samples at index values preceding and succeeding the coarse timing sample index value. | 06-07-2012 |
20120147730 | WIRELESS COMMUNICATIONS SYSTEM WITH SECONDARY SYNCHRONIZATION CODE BASED ON VALUES IN PRIMARY SYNCHRONIZATION CODE - A wireless communication system. The system comprises transmitter circuitry (BST | 06-14-2012 |
20120147877 | WIRELESS COMMUNICATIONS SYSTEM WITH SECONDARY SYNCHRONIZATION CODE BASED ON VALUES IN PRIMARY SYNCHRONIZATION CODE - A wireless communication system. The system comprises transmitter circuitry (BST | 06-14-2012 |
20120154184 | WIRELESS COMMUNICATIONS SYSTEM WITH SECONDARY SYNCHRONIZATION CODE BASED ON VALUES IN PRIMARY SYNCHRONIZATION CODE - A wireless communication system. The system comprises transmitter circuitry (BST | 06-21-2012 |
20130058329 | WIRELESS ROUTER SYSTEM - Conventional routers employ a wired backplane that employs “long reach” serializer/deserializer (SerDes) links, but this type of architecture is complicated, costly, and uses a considerable amount of power. To address some of these issues, a new wireless backplane architecture is provided here. This wireless backplane employs direct millimeter wave links between line cards that replaces the convention, wired switching fabric. | 03-07-2013 |
20130106641 | CARRIER FREQUENCY OFFSET COMPENSATION IN BEAMFORMING SYSTEMS | 05-02-2013 |
20130131983 | Low-Complexity Tightly-Coupled Integration Filter for Step Detection in a Sensor-Assisted GNSS Receiver - Embodiments of the invention provide a step detection. An accelerometer measurement in the form of a multi-dimensional acceleration vector is obtained. The magnitude of the accelerometer measurement is filtered using a low pass filter. A threshold for a down-crossing is provided as is a threshold for an up-crossing. A step detection is triggered if the magnitude of the accelerometer measurement is greater than or equal to the threshold for an up-crossing. | 05-23-2013 |
20130170433 | SYSTEMS AND METHODS FOR NETWORKING CODING USING REED-SOLOMON CODES - A method for network coding includes encoding a plurality of message packets to produce a plurality of encoded packets. Each message packet and each encoded packet includes a plurality of symbols having an index and each symbol of the encoded packets is generated by applying a Reed-Solomon code to the symbols of the message packets having the same index as the symbol of the encoded packets. A length of the encoded packets is the same as a length of the message packets. | 07-04-2013 |
20130170587 | Systems and Methods for N-Dimensional Leaf-Node Prediction for MIMO Detection - Systems comprising a leaf node predictor for receiving a processed communications stream, determining at least one channel metric corresponding to the communications stream for a given channel realization, and generating at least three instructions to output, which at least one instruction corresponds to at least one predicted best leaf node candidate for the given channel realization. | 07-04-2013 |
20130185617 | WIRELESS BACKHAUL COMMUNICATION - A method for wireless backhaul communication comprising receiving, by a wireless backhaul transmitter, a data stream in a bit format and generating, by the wireless backhaul transmitter using a single-carrier block transmission scheme, a radio frame to include a plurality of physical data channel (PDCH) blocks, a pilot signal (PS) block and a physical control channel (PCCH) block with each block type pre-appended with a cyclic prefix (CP). A length of the PS block in symbols, a length of the PCCH block in symbols and a length of the PDCH block in symbols is determined by a frequency band, a bandwidth, and a channel condition. The wireless backhaul transmitter then transmits the radio frame. | 07-18-2013 |
20130201965 | WIRELESS NETWORKS UTILIZING MULTIPLE MODULATIONS - A method of communicating in a wireless network including a plurality of nodes having communications devices including a first node, wherein at least one node utilizes a first physical layer (PHY) modulation, and at least one other node utilizes a second PHY modulation different from the first PHY modulation. The first node receives a PHY frame transmitted by one of the plurality of nodes, and identifies a PHY modulation type selected from the first PHY modulation and the second PHY modulation used in the PHY frame or to be used in a subsequently to be received PHY frame or frame portion. The first node decodes the PHY frame or the subsequently to be received PHY frame or frame portion using the PHY modulation type identified in the identifying step. | 08-08-2013 |
20130258892 | Wireless Chip-to-Chip Switching - Embodiments of the invention provide a system and method for chip to chip communications in electronic circuits. A router or switch receives data packets at input port ASICs. A routing table on the input port ASIC or on a routing ASIC is used to identify a destination port ASIC based upon header information in the data packet. The data packet is transmitted from the input port ASIC to the destination port ASIC using millimeter wave signals that are transmitted across a waveguide or a wireless interface. | 10-03-2013 |
20130259016 | COEXISTENCE OF WIRELESS SENSOR NETWORKS WITH OTHER WIRELESS NETWORKS - A wireless device includes a wireless transceiver configured to transmit to and receive from nodes in a wireless sensor network (WSN) and control logic coupled to the first wireless transceiver. The wireless transceiver transmits a wireless packet to a node in the WSN based on the transmission coinciding with a break in transmissions for a second wireless network. Based on the wireless transceiver being configured to transmit the wireless packets utilizing time synchronized channel hopping, slot frames for packet transmissions in the WSN are time offset so as not to coincide with transmissions made on the second wireless network. Based on the wireless transceiver being configured to transmit the packets utilizing coordinated sampled listening, wake up sequence transmissions for the WSN are time offset so as not to coincide with the transmissions made on the second wireless network. | 10-03-2013 |
20130290765 | CHARGING A PROVIDER/CONSUMER WITH A DEAD BATTERY VIA USB POWER DELIVERY - A method and apparatus are provided. The VBUS conductor is checked to determine whether the voltage on the VBUS conductor is greater than a vSafe0V voltage within a dead battery detect time interval, and the device policy manager is instructed to apply a vSafeDB voltage to the VBUS conductor if the voltage on the VBUS conductor is greater than the vSafe0V voltage. The policy engine waits for a bit stream to be detected within a bit stream detect timer interval. If the bit stream is not detected within the bit stream detect timer interval, then the device policy manager is instructed to apply the vSafe0V voltage to the VBUS conductor. The device policy manager is instructed to apply a vSafe5V voltage to the VBUS conductor if the bit stream is detected, and the policy engine waits for the bit stream to stop within a device ready timer interval. If the bit stream has stopped within the device ready timer interval, then the policy engine sends capabilities as a source port. | 10-31-2013 |
20130343366 | PHY LAYER PARAMETERS FOR BODY AREA NETWORK (BAN) DEVICES - In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz. | 12-26-2013 |
20140036751 | BEACON SCHEDULING FOR WIRELESS NETWORKS - A system and method for reducing energy consumption in a wireless network. In one embodiment, a system includes a network coordinator configured to manage access to a wireless network. The network coordinator includes a controller. The controller is configured to define a channel hopping list that specifies on which channel a beacon signal is transmitted in each slot frame of the wireless network. The controller is also configured to set a number of time slots in each slot frame based on a length of the channel hopping list. The controller is further configured to transmit a first beacon signal in each slot frame on a channel specified by the channel hopping list. The number of slots in each slot frame causes the first beacon signal to be transmitted on a same channel in each slot frame. | 02-06-2014 |
20140064262 | Apparatus and Method for Processing a Physical Layer Convergence Protocol Header - Apparatus and method for processing a physical layer protocol convergence (PLCP) header. In one embodiment, a wireless device includes a PLCP header processor. The PLCP header processor is configured to: process a physical layer header, process a check value based on the physical layer header, and process an error correction code based on the physical layer header and the check value. A concatenation of the physical layer header, check value, and error correction code the PLCP header processor is configured to process consists of a number of information bits that is an integer multiple of a number of information bits per symbol used to encode the PLCP header. | 03-06-2014 |
20140064336 | ULTRA WIDEBAND MODULATION FOR BODY AREA NETWORKS - A symbol modulation system applicable to a body area network is disclosed herein. The symbol modulation system includes a symbol mapper. The symbol mapper is configured to determine a time within a predetermined symbol transmission interval at which a transmission representative of the symbol will occur. The time is determined based on a value of a symbol and a value of a time-hopping sequence. The time is selected from a plurality of symbol value based time slots, and a plurality of time-hopping sequence sub-time-slots within each symbol value based time slot. The symbol mapper is configured to generate a single guard interval within the symbol transmission interval. The single guard interval is positioned to terminate the symbol transmission interval. | 03-06-2014 |
20140079162 | METHODS FOR ASSIGNING CODEWOODS TO POINTS IN HEXAGONAL CONSTELLATIONS IN DIGITAL COMMUNICATION SYSTEMS - Embodiments of the invention provide a method of decoding of hexagonal constellations. The decoding methods exploit the inherent structure of the hexagonal grid to eliminate/minimize the requirements for distance computations. A constellation which has unused constellation points is received. A plurality of lookup tables is used for indicating whether a particular constellation point is used. The lookup tables are indexed using the two integers u and v. An initial estimate of u and v is found. The euclidean distance to an immediate four neighbors resulting in the immediate upper and lower integers for ū and | 03-20-2014 |
20140112330 | SHORT AND LONG TRAINING FIELDS - A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN. | 04-24-2014 |
20140153558 | PHY LAYER OPTIONS FOR BODY AREA NETWORK (BAN) DEVICES - In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment using M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK. Also, the PHY layer uses a constant symbol rate for BAN packet transmissions. | 06-05-2014 |
20140233609 | ULTRA WIDEBAND MODULATION FOR BODY AREA NETWORKS - A symbol modulation system applicable to a body area network is disclosed herein. The symbol modulation system includes a symbol mapper. The symbol mapper is configured to determine a time within a predetermined symbol transmission interval at which a transmission representative of the symbol will occur. The time is determined based on a value of a symbol and a value of a time-hopping sequence. The time is selected from a plurality of symbol value based time slots, and a plurality of time-hopping sequence sub-time-slots within each symbol value based time slot. The symbol mapper is configured to generate a single guard interval within the symbol transmission interval. The single guard interval is positioned to terminate the symbol transmission interval. | 08-21-2014 |
20140362701 | NLOS WIRELESS BACKHAUL DOWNLINK COMMUNICATION - A method for communicating over a wireless backhaul channel comprising generating a radio frame comprising a plurality of time slots, wherein each time slot comprises a plurality of symbols in time and a plurality of sub-carriers in a system bandwidth, broadcasting a broadcast channel signal comprising a transmission schedule to a plurality of remote units in a number of consecutive sub-carriers centered about a direct current (DC) sub-carrier in at least one of the time slots in the radio frame regardless of the system bandwidth, and transmitting a downlink (DL) control channel signal and a DL data channel signal to a first of the remote units, wherein the DL data channel signal is transmitted by employing a single carrier block transmission scheme comprising a Discrete Fourier Transform (DFT) spreading for frequency diversity. | 12-11-2014 |
20140365848 | NLOS WIRELESS BACKHAUL UPLINK COMMUNICATION - A method for uplink (UL) wireless backhaul communication at a wireless backhaul remote unit in a radio access network comprising receiving a configuration for radio frames and a transmission schedule through a downlink (DL) physical layer broadcast channel, wherein the transmission schedule comprises a transmission allocation for the remote unit, generating a UL data frame, wherein generating the UL data frame comprises performing forward error correction (FEC) encoding on a data bit stream to generate a plurality of FEC codewords, wherein performing the FEC encoding comprises performing Reed Solomon (RS) encoding on the data bit stream to generate a plurality of RS codewords, performing byte interleaving on the RS codewords, and performing Turbo encoding on the byte interleaved RS codewords to generate one or more Turbo codewords, wherein each Turbo codeword is encoded from more than one RS codeword, and transmitting the UL data frame according to the transmission allocation. | 12-11-2014 |