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| Number | Title | Issue Date |
| 7697624 | Communication apparatus and communication method utilizing multiple carrier waves for overcoming interference There are included a transmission modulator (103) for impulse-modulating the data to be transmitted, thereby producing a subcarrier; a subcarrier control section for controlling the subcarrier to be utilized for communication, depending on the amount and sign... | 04/13/2010 |
| 7697625 | Method and system for transmitting and receiving data streams A method and system for transmitting and receiving data using a plurality of antennas are disclosed. The method of transmitting includes the steps of receiving feedback information from a receiving end, the feedback information including group selection information ... | 04/13/2010 |
| 7697626 | Method and apparatus for selecting a beam combination in a MIMO wireless communication system A method and apparatus for selecting a beam combination of beam switched antennas in a multiple-input multiple-output (MIMO) wireless communication system including a first node and a second node. The first node sends a plurality of modulation and coding scheme (MCS... | 04/13/2010 |
| 7693228 | Channel estimation for orthogonal preambles in a MIMO system A general architecture scheme to perform channel estimation on orthogonal transmissions for any number of transmitting antennas present. Generally, the channel estimation is applicable for wireless communications in a MIMO system. ... | 04/06/2010 |
| 7688909 | Radio communication system, radio communication method, radio transmitter and radio receiver A radio transmitter includes an orthogonal transformation unit for carrying out an orthogonal transformation on pilot signals having orthogonal relation to each other between transmission antennas and a pilot multiplexing unit multiplexing the pilot signals and tran... | 03/30/2010 |
| 7688910 | Wireless communication system, wireless communication apparatus, wireless communication method, and computer program Disclosed is a wireless communication system which carries out spatial multiplexing communication forming multiple spatial channels between a pair of a transmitter with multiple antennas and a receiver with multiple antennas, having the transmitter and the receiver.... | 03/30/2010 |
| 7684510 | Apparatus and method for transmission which encoding a message with space-time tubo code using feedback bit in mobile communication system An apparatus and a method for transmission encoding a message with space-time turbo code using feedback information of the channel gain or the phase in digital mobile communication system having a plurality of transmit antennas are disclosed. ... | 03/23/2010 |
| 7684511 | Antenna virtualization in communication systems Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each ... | 03/23/2010 |
| 7684508 | Transmission diversity detecting apparatus capable of generating quality indicator and related method thereof The invention relates to a transmission diversity detecting apparatus and method. The transmission diversity detecting apparatus is applied in a Wideband Code-Division Multiple-Access (WCDMA) system having a CIPCH channel and a synchronization channel for detecting ... | 03/23/2010 |
| 7684506 | Transmitter apparatus, receiver apparatus, and wireless communication method A space-time block encoder changes the patterns of space-time block code signals according to transmission data. The space-time block encoder makes the space-time block code signals by making first and second transmission symbols from transmission data and changing ... | 03/23/2010 |
| 7684509 | Method and system for utilizing space-time overlays for convolutionally coded systems A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that is configured to output a message signal, and an encoder that is configured to generate a code word in respo... | 03/23/2010 |
| 7684507 | Method and apparatus to select coding mode Briefly, an apparatus and method that may adaptively select a coding mode of an OFDM sub-carrier symbol of a data stream according to a received channel state information related to the OFDM sub-carrier. ... | 03/23/2010 |
| 7680202 | Digital wireless audio communication system employing time diversity A communication system that transfers digital data on a fixed frequency channel of a radio frequency band in the presence of interference from at least one FHSS interference source includes a time diversity generation circuit. The time diversity circuit compacts a d... | 03/16/2010 |
| 7680206 | Selecting modulation and coding level and spatial rate for orthogonal frequency domain modulation systems Embodiments are directed to a link adaptation method that selects the optimum transmission scheme and modulation and coding signal (MCS) level within a MIMO system, based on optimal maximum throughput on the channels. The method selects the MCS levels and spatial ra... | 03/16/2010 |
| 7680203 | Wireless communication apparatus and wireless communication method A wireless communication apparatus for receiving spatially multiplexed signals in which a plurality of streams are spatially multiplexed, using a plurality of antennas, includes the following elements: a channel matrix estimator for estimating a channel matrix for m... | 03/16/2010 |
| 7680205 | Method and system for transmitter beamforming for reduced complexity multiple input multiple output (MIMO) transceivers Aspects of a method and system for transmitter beamforming for reduced complexity multiple input multiple output (MIMO) transceivers are presented. Aspects of the system may include a MIMO transmitter that computes a channel estimate matrix and decomposes the comput... | 03/16/2010 |
| 7680204 | Method and system of convolutive coding for the transmission of space-time block codes according to the technique termed Golden Code A method is provided for convolutive coding for the transmission of space-time block codes according to the technique termed Golden Code, in a wireless communication network comprising at least a plurality of transmit antennas. The Golden Code coding is associated w... | 03/16/2010 |
| 7675989 | Method and apparatus for uplink carrier frequency synchronization and antenna weight vector estimation in OFDMA system having smart antenna An apparatus for estimating an antenna weight vector in an Orthogonal Frequency Division Multiple Access System (OFDMA) having a smart antenna. The apparatus includes receiving and storing training symbols in the time domain transmitted to estimate an antenna weight... | 03/09/2010 |
| 7675988 | Apparatus and method for beamforming in a multi-antenna system An apparatus and method for performing beamforming or transmitting a plurality of bit streams output through Adaptive Modulation and Coding (AMC) via a plurality of transmission antennas in a base station using a multi-antenna scheme. The apparatus and method includ... | 03/09/2010 |
| 7675990 | Space-time codes for linearly labelled PAM, PSK, QAM and related constellations using gray mapping General algebraic space-time code constructions are presented for Gray-mapped 2K-PSK, 2K-PAM, and 4K-QAM constellations. The space-time codes achieve the rate-diversity tradeoff—i.e., they allow the transmission of information at t... | 03/09/2010 |
| 7675991 | Wireless transmitting and receiving device and method A wireless device, method, and signal for use in communication of a wireless packet between transmitting device and a wireless receiving device via a plurality of antennas, wherein a signal generator generates wireless packet including a short-preamble sequence used... | 03/09/2010 |
| 7672388 | Method of providing signal diversity in an OFDM system A method and apparatus is provided for transceiving an information signal in an orthogonal frequency division multiplexed (OFDM) communication system that uses a plurality of radio frequency subcarriers modulated with the information signal and transceives the modul... | 03/02/2010 |
| 7672389 | Method for transmitting symbols through at least a communication channel The present invention concerns a method for transmitting symbols through at least a channel in a telecommunication system including at least one transmitter (10) provided with at least two transmitting antennas (Antt 1, Antt 2) and at least one ... | 03/02/2010 |
| 7672391 | MIMO receivers having one or more additional receive paths In a multiple-input, multiple-output (MIMO) system, a receiver is implemented with at least one additional receive path beyond the number of transmit antennas used to transmit the signals (e.g., wireless OFDM signals) received at the receiver. In one embodiment, the... | 03/02/2010 |
| 7672390 | Low complexity scalable MIMO detector and detection method thereof A scalable Multiple-Input Multiple-Output (MIMO) detector, comprises an ordering block, a group interference suppression block, a core detector and a residual detector. The ordering block determines an order of the columns of a channel matrix including received stre... | 03/02/2010 |
| 7668251 | Scalable post-channel estimate phase corrector, method of correction and MIMO communication system employing the corrector and method The present invention provides a post-channel estimate phase corrector for use with a multiple-input, multiple-output (MIMO) receiver employing M receive antennas, M being at least two. In one embodiment, the post-channel estimate phase corrector includes a pilot se... | 02/23/2010 |
| 7668252 | Frequency offset tracking The present invention relates to estimating and correcting for frequency offset errors in wireless receivers, and is particularly but not exclusively related to MIMO WLAN applications. The present invention provides an improved method of tracking receiver frequency ... | 02/23/2010 |
| 7664194 | Combining space time block code (STBC) with spatial multiplexing for MIMO transmission A STBC-based transmission method and transmission system provides equal protection on all data streams such that all streams operate at the same SNR. STBC and spatial multiplexing are combined in a transmitter which provides equal STBC coding protection on all data ... | 02/16/2010 |
| 7664195 | Method to increase the bit rate in a communication system Disclosed is a method and a device to increase the bit rate in a communications system comprising N transmitters (2N) and M receivers (3M), with M greater than or equal to N. The method comprises the following steps. ... | 02/16/2010 |
| 7664196 | Frequency agile phase locked loop A circuit having a frequency controllable oscillator and a variable time delay circuit. The time delay circuit is fed by a signal produced by the oscillator, such time delay circuit being coupled to the oscillator to control the frequency of the signal produced by t... | 02/16/2010 |
| 7664191 | Method of symbol detection for MIMO dual-signaling uplink CDMA systems The invention provides a block-wise successive interference cancellation (SIC) detection algorithm for a general multi-input multi-output (MIMO) CDMA system over the frequency-selective channels, in which each user's data stream can be simultaneously applied with or... | 02/16/2010 |
| 7664192 | Apparatus and method for minimizing a PAPR in an OFDM communication system A transmitter for minimizing a PAPR in OFDM communication system. The transmitter includes: a precoder for coding input symbols so that a signal rotation is generated, and generating a complex vector including the coded symbols; an encoder for performing a frequency... | 02/16/2010 |
| 7664193 | Multiplexing of real time services and non-real time services for OFDM systems For certain embodiments of the present disclosure, a method and apparatus for generating pilots in a wireless multiple-input multiple output (MIMO) communication system is provided. The method comprises obtaining at least one pilot symbol for each antenna of a plura... | 02/16/2010 |
| 7660363 | Minimum error rate lattice space time codes for wireless communication A lattice space time coding arrangement for transmission systems is disclosed which enables construction of lattice space time codes with improved error rate performance for arbitrary receiver structures. ... | 02/09/2010 |
| 7660362 | Wireless local area network system using space-time block coding (STBC) having backward compatibility with prior standards A method of communicating data to a receiving antenna from N transmitting antennas, where N is an integer, includes the steps of determining whether a legacy transmission mode has been selected, producing N data streams from outbound data, and applying the N data st... | 02/09/2010 |
| 7656961 | Method and apparatus for multi-user transmission A method of transmitting data signals from at least two transmitting terminals to at least one receiving terminal with a spatial diversity antenna comprises transmitting from the transmitting terminals transformed data signals, being transformed versions of the data... | 02/02/2010 |
| 7653142 | Channel estimation and spatial processing for TDD MIMO systems Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/receive chains at the access point and user terminal. During normal operation, a MIMO pilot is transmitted on a firs... | 01/26/2010 |
| 7649954 | 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 multiple transmission channels. The available transmission channels are segregated into one or more groups, and the channels in each group are selected for use for data transmission. Data for each group is coded and m... | 01/19/2010 |
| 7649955 | MIMO receiver and method for beamforming using CORDIC operations Embodiments of a MIMO receiver and method for beamforming using CORDIC operations are generally described herein. Other embodiments may be described and claimed. In some embodiments, complex singular value decomposition (SVD) operations are performed on a channel ma... | 01/19/2010 |
| 7649953 | Differential multiple-length transmit and reception diversity The present invention achieves differential transmit diversity and related diversity reception schemes transmit symbol constellations which are extended to multiple levels. Heretofore, a group of transmission bits is divided into a first sub-group of transmission bi... | 01/19/2010 |
