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8514975 Method and apparatus for transmitting reference signal in wireless communication system  
A method and an apparatus for transmitting a reference signal in a wireless communication system are provided. The method includes generating a first sequence and a second sequence, mapping the...
8514693 Broadcast and multicast in single frequency networks using othrogonal space-time codes  
In one embodiment, a method of transmitting includes assigning column vectors of a generalized orthogonal space time code matrix to coverage areas of a plurality of base stations such that each...
8509338 Method and precoder information feedback in multi-antenna wireless communication systems  
A method for two component feedback in wireless communication systems is disclosed, with a wireless communication device sending a first representation of a first matrix chosen from a first...
8509329 Data receiving apparatus for receiving data frame using constellation mapping scheme and data transmission apparatus for transmitting the date frame  
Disclosed are a data receiving apparatus that may discriminate a type of a received data frame, and a data transmission apparatus that may apply a constellation mapping scheme to a data frame so...
8509366 Method, apparatus and computer program for calculating a noise covariance estimate  
A final NOCE (noise covariance estimate) for reducing noise in a first channel of a receiver with a plurality of antennas is calculated. A first raw NOCE for the first channel is calculated,...
8509352 Integer spreading rotation matrices for QAM constellations and its decode-remodulate-forward cooperative communication strategy  
Diversity techniques are commonly used in wireless communications to combat multipath fading. Recent interests in ultra-wideband technology focus on multi-band OFDM systems that can explore the...
8509705 Differential closed-loop transmission feedback in wireless communication systems  
A method and apparatus for providing channel feedback is provided herein. During operation a covariance matrix at time t (R) is calculated as a function of a received downlink signal. Matrix Ct is...
8509333 Method for transmitting a signal from a transmitter to a receiver in a power line communication network, transmitter, receiver, power line communication modem and power line communication system  
A method for transmitting a signal from a transmitter over a channel to a receiver on a Power Line Network, wherein said signal is OFDM-modulated on a set of sub-carriers, is proposed, wherein an...
8509339 Reference signaling scheme using compressed feedforward codebooks for multi-user multiple input multiple output (MU-MIMO) systems  
A multi-user multiple input multiple output (MIMO) downlink beamforming system with limited feed forward (200) is provided to enable precoding matrix information to be efficiently provided to a...
8502720 Parallel digital to analog conversion with image suppression  
A digital to analog conversion apparatus includes a plurality of gain/phase adjusters configured to receive a digital signal and to output a plurality of adjusted digital input signals, a plurality...
8503590 Receiving apparatus for receiving signals through adaptive array antenna  
Preceding filters receive the inputs of a plurality of received signals associated respectively with a plurality of antennas. Subsequent filters band-limit the plurality of inputted received...
8503589 Wireless communication apparatus and wireless reception method  
A wireless communication apparatus, having a plurality of antennas 11-1 to 11-M and for diversity-combining signals received by the plurality of antennas 11-1 to 11-M, is provided with a combining...
8503581 Encoding and decoding method for transmitting and estimating multiple simultaneous channels  
An improved encoding and decoding method for the transmission and estimation of multiple simultaneous channels, thereby solving the problem of shortening the time required to measure the...
8503291 Systems and methods for directing a beam towards a device in the presence of interference based on reciprocity  
Methods and apparatus are provided for directing a beam towards a receiving device in the presence of interference. A beam transmitted by a transmission source is received at a receiving device....
8503548 Turbo channel estimation for OFDM systems  
A system and method for estimating a channel in a wireless receiver is disclosed. The method preferably applies to a communication system using the OFDM standard. The method comprises receiving a...
8503560 System and method for performing precoding in a wireless communication system  
A base station capable of performing precoding in a wireless communication system is provided. The base station includes a plurality of codebooks and a codebook selector. Each codebook comprises a...
8498361 Channel tracking in a wireless MIMO communication system  
An estimate of a multiple input, multiple output (MIMO) channel is computed, and an equalizer to be applied to signals received via the MIMO channel is computed. The equalizer is initialized based...
8498358 Multiple antenna communication system including adaptive updating and changing of codebooks  
Communication between a base station with multiple transmission antennas and a mobile station is provided. The base station and the mobile station may recognize or estimate, respectively, a channel...
8498360 Systems and methods for wireless communication system channel allocation using intentional delay distortion  
Advantage is taken of adaptive allocation techniques by intentionally creating multi-user diversity in an otherwise flat fading environment in order to improve system capacity. In one embodiment,...
8498353 Apparatus and method for cyclic delay diversity in multiple-antenna wireless communication system  
A cyclic delay diversity (CDD) technique in a multiple-antenna broadband wireless communication system is provided. An apparatus in the multiple-antenna broadband wireless communication system...
8498658 Techniques and systems for providing data over power in communications based on time reversal  
Techniques, apparatuses and systems for providing communications based on time reversal of a channel impulse response of a pulse in a transmission channel between a transmitter and a receiver to...
8494093 Method and apparatus for generating beamforming feedback  
Channel state information (CSI) for a single data stream transmitted via a plurality of antennas is determined in a hardware device. Cophasing angles for the plurality of antennas are determined in...
8494067 Pilot transmission method in a wireless communication system  
A pilot transmission method in a wireless communication system is provided. The method includes: transmitting a first pilot for channel measurement through a first transmission section; and...
8494076 MIMO wireless data communication system, MIMO wireless data communication method and MIMO wireless data communication apparatus  
In a MIMO wireless communication system, the transformation process synthesizes the eigenmodes having a large singular value (i.e. a high effective SNR) and the eigenmodes having a small singular...
8494033 Methods providing precoder feedback using multiple precoder indices and related communications devices and systems  
Data may be transmitted from a first communications device using multiple antennas to a second communications device based on precoder feedback defining a grid of transmission beams. A first...
8494099 Signal processing using modified blockwise analytic matrix inversion  
In one embodiment, a method for signal processing is provided that uses an improved inversion to mitigate the imprecision introduced by fast approximate methods for division. An input signal is...
8489039 Beamformed multi-input multiple-output communication with uplink transmission rotation  
Techniques are provided to enable computation of beamforming weights for beamforming MIMO wireless communication between first and second wireless communication devices. At the first device...
8488711 Geometry based efficient decoder for underdetermined MIMO systems and decoding method thereof  
A decoder for underdetermined MIMO systems with low decoding complexity is provided. The decoder consists of two stages: 1. Obtaining all valid candidate points efficiently by slab decoder. 2....
8488726 Receivers based on closed-form parametric estimates of the probability density function for the received signal  
A closed-form parametric approach to channel-estimation is provided. In one aspect, a specific parametric expression is presented for the received signal pdf that accurately models the behavior of...
8488721 Adaptive QRD-M algorithm based signal detecting method by using constellation set grouping in spatial multiplexing multiple-input multiple-output system  
There is provided a signal detecting method using constellation set grouping in a spatial multiplexing multiple input multiple output system. The signal detecting method includes dividing a set of...
8488725 Method and system for spatial channel state information feedback based on a kronecker product  
A spatial channel state information (CSI) feedback technique is incorporated into multiple-input multiple-output mobile communications technologies. Spatial channel state information is measured at...
8488727 System and method of selecting antennas based on signal-to-noise ratios and signal quality values  
A system includes a receiver, a processor and a decision device. The receiver receives a first signal via a first antenna, and one of the first signal and a second signal via a second antenna. The...
8488706 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion  
Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based...
8489036 Mobile phone for controlling diversity  
A mobile phone to transmit and receive a radio frequency signal through a first antenna and a second antenna in a radio communication system includes a first radio frequency signal receiving unit...
8488724 Wideband interference mitigation for devices with multiple receivers  
Certain disclosed embodiments pertain to suppressing interference in a wireless communication system. For example, a method of suppressing interference can include receiving one or more first...
8488707 Multi-antenna subsystem for software defined radio  
The present invention relates to a multi-antenna subsystem for a SDR (software defined radio) capable of supporting a multi-antenna technique to an antenna system using a multi-antenna subsystem....
8488695 Receiving apparatus and method, program, and receiving system  
A receiving apparatus for receiving an orthogonal frequency division multiplexing (OFDM) signal including a frame having one frame length of a plurality of patterns. The apparatus comprises an...
8483304 Radio transmitter, radio communication system, and radio transmission method  
A radio transmitter of the present invention includes a scheduler for assigning a communication time or a communication frequency to each radio receiver based on quality information of a received...
8483328 System for soft symbol decoding MIMO log-map detection  
A soft symbol decoder for use in a multiple input multiple output (MIMO) and OFDM (orthogonal frequency division multiplexing) system. The decoder generates soft symbol values for a digital signal...
8483339 Communication apparatus and communication process method  
Provided is a communication apparatus and a communication process method that improve reception quality when receiving a signal using a plurality of antennas. The communication apparatus includes...
8483301 Multitone signal synchronization  
In one embodiment, a method to generate a set of tone frequencies within an operating frequency range for use in a timing acquisition process in a wireless communication system comprises selecting...
8483260 Covariance factor matrix reuse  
A method and apparatus for reducing the computational load associated with computing weighting factors for wireless signals received at a wireless receiver is disclosed herein. The method and...
8477803 Method and system for implementing a single weight (SW) single channel (SC) MIMO system with no insertion loss  
In a RF communications system, aspects for implementing a single weight single channel MIMO system with no insertion loss may comprise generating at least one control signal that is utilized to...
8477866 Calibration method for Tx/Rx path characteristic of channel sounder  
The method includes performing a wired back-to-back test by forming M wired paths connecting one of the N transmission antennas with the M reception antennas through M cables, separating ith...
8477858 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion  
Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based...
8477883 Maximum likelihood decoding method, equipment, and receiver  
Provided is a maximum likelihood decoding method of separating and estimating multiple transmitted signals transmitted by multiple transmitter antennas from multiple received signals received by...
8477893 Multi-rake receiver  
A receiver includes a select module, an enable module, and a receiver module. The select module is configured to detect (i) a number of antennas in the receiver, or (ii) a number of enabled...
8477882 Radio apparatus  
An RF unit receives multicarrier signals via a plurality of antennas. A division unit divides the multicarrier signals received into a plurality of groups in the frequency domain. The division unit...
8472546 Method of data transmission in multiple antenna system  
A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword...
8472335 Selecting transmission technology for communications in wide area mobile networks  
Method and RNC for selecting transmission technology when a UE enters the network, which checks whether the UE is MIMO and, if so and only one carrier is available, allocates its traffic to said...