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| Number | Title | Issue Date |
| 7120201 | Method and system for optimization of channel estimation and synchronization in an OFDM-MIMO wireless communication system The present invention is related to a method and system for optimization of channel estimation and synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) Multiple-Input Multiple-Output (MIMO) wireless communication system. In accordance with the pre... | 10/10/2006 |
| 7120200 | Transmitter diversity technique for wireless communications A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only of simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter uti... | 10/10/2006 |
| 7116724 | Method and system for transmitting and receiving signal in mobile communication using a 2-dimensional space-time interleaver Disclosed is a signal transmitting and receiving method and system in a mobile communication system provided with a plurality of antennas. The signal transmitting method in the mobile communication system that transmits a signal through a plurality of antennas inclu... | 10/03/2006 |
| 7116723 | Closed loop transmit diversity method and apparatus using complex basis vector sets for antenna selection A transmission antenna diversity method, and a base station apparatus and a mobile station apparatus therefor in a mobile communication system are provided. In the transmission antenna diversity method, channel information is measured from signals received through t... | 10/03/2006 |
| 7116722 | Wireless communication system using multi-element antenna having a space-time architecture A method and apparatus for increasing the capacity of a multiple-input and/or multiple-output system. Each sub-stream of a primary data stream is stratified to produce a processed sub-stream whose strata can be separated out and decoded with an acceptable error rate... | 10/03/2006 |
| 7113558 | Space-time processing for wireless systems with multiple transmit and receive antennas Signals are developed for use in a wireless system with multiple transmit and multiple receive antennas so that even in the face of some correlation the most open-loop capacity that can be achieved using a substantially open-loop system with a channel of that level ... | 09/26/2006 |
| 7113548 | OFDM transmission system transceiver and method An frequency division multiplexing (OFDM) system transceiver for transmitting frequency dividing data in parallel includes antenna elements for receiving known reception and reception data signals. The fast Fourier transforms (FFTs) transform the known reception sig... | 09/26/2006 |
| 7113745 | Method to achieve diversity in a communication network A method of wirelessly communicating between units comprises using at least two repeaters between a transmit unit and a receive unit. The repeaters enable a diversity scheme to be emulated. ... | 09/26/2006 |
| 7110468 | Transmission apparatus, transmission method, communication system, and method of same To provide a transmission apparatus and a communication system that transmit a plurality of transmission signals riding on different interfering transmission beams, separate and receive the transmission signal at the receiving side, and estimate the original transmi... | 09/19/2006 |
| 7110480 | Adaptive array apparatus The control unit 50 calculates weighting factors for one symbol out of every k symbols. During this calculation, the control unit 50 calculates weighting factors for respective inphase and quadrature components of the symbol stored in every I and Q buf... | 09/19/2006 |
| 7110048 | Digital signal transmitter synchronization system Methods, and apparatus for carrying out the methods, are disclosed for synchronizing a plurality of RF transmitters that are supplied with a common digital information signal for carrier modulation and subsequent transmission on a common channel throughout a prescri... | 09/19/2006 |
| 7110739 | Multi-transmitter communication system employing anti-phase pilot signals Base station transmitter signals are combined more effectively through the use of anti-phase pilots between pairs of transmission paths. At the combiner, the pilots will cancel when the amplitude, phase, and delay of the two transmission paths entering the combiner ... | 09/19/2006 |
| 7110464 | Method and system for utilizing space-time codes for block fading channels 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... | 09/19/2006 |
| 7106802 | Apparatus, and associated method, for forming a modulated signal utilizing OTD and TCM techniques Apparatus, and an associated method, for facilitating communication of data upon a communication channel which exhibits fading. Orthogonal transmit diversity techniques and trellis-coded modulation techniques are utilized to form a signal permitting the communicatio... | 09/12/2006 |
| 7103325 | Adaptive modulation and coding The present invention selects a space-time encoding mode to use when transmitting with spatial diversity based on the receive diversity associated with a receiver device and the quality of the transmission channels based on information fed back from the receiver dev... | 09/05/2006 |
| 7103326 | Adaptive transmit diversity with quadrant phase constraining feedback A method increases transmit diversity gain in a wireless communication system. In the wireless network, a transmitter has multiple antennas and a receiver has one antenna. A phase of each of received signal is measured. One signal is selected as a reference signal. ... | 09/05/2006 |
| 7099414 | Ordered decoding in wireless communications that utilize turbo coding and transmit diversity In a wireless communication receiver (31) of a wireless communication system that utilizes transmit diversity and turbo coding, symbol decisions are based at least in part on a posteriori probabilities (47, 48) produced by SISO decoders (35, 36)... | 08/29/2006 |
| 7099678 | System and method for transmit weight computation for vector beamforming radio communication A system and method for vector wireless radio communication (multiple modes or signal streams) between a first communication device and a second communication device using radio frequency (RF) communication techniques. At each communication device, signals are recei... | 08/29/2006 |
| 7099634 | Transmitting diversity communications apparatus The plurality of antennas of a base station used for transmitting diversity are divided into groups. Each antenna is located so that signals transmitted from antennas in the same group have a high fading correlation. Each antenna group is spaced so that a fading cor... | 08/29/2006 |
| 7099265 | OFDM communication system and transmitter-receiver for use in the system A diversity OFDM communication is performed between a base terminal and a mobile terminal, both having a horizontal polarization antenna and a vertical polarization antenna forming two transmission channels. In the base terminal, data signals to be transmitted are d... | 08/29/2006 |
| 7099269 | Methods and apparatus for generating and utilizing training codes in a space division multiplexing communication system A communication system is disclosed that comprises first and second communication apparatus. The first communication apparatus is provided with a transmitter for each of the transmission paths, which are capable of sending at least part of a communication signal to ... | 08/29/2006 |
| 7099266 | Orthogonal frequency division multiplexed signal transmitting apparatus, orthogonal frequency division multiplexed signal receiving apparatus, and orthogonal frequency division multiplexed signal transmitting/receiving system An orthogonal frequency division multiplexed signal transmitting apparatus executes a time-division multiplexing process that inserts a reference signal at a predetermined interval based on reference signal position information into an information signal to be trans... | 08/29/2006 |
| 7095709 | Diversity transmission modes for MIMO OFDM communication systems Techniques for transmitting data using a number of diversity transmission modes to improve reliability. At a transmitter, for each of one or more data streams, a particular diversity transmission mode is selected for use from among a number of possible transmission ... | 08/22/2006 |
| 7092450 | Frequency-domain method for joint equalization and decoding of space-time block codes Space-time block coding is combined with single-carrier, minimum-mean-square-error, frequency-domain equalization for wireless communication through a medium characterized by multi-paths. The transmitter encodes incoming symbols into two or more streams that are tra... | 08/15/2006 |
| 7088785 | Block level space time transmit diversity in wireless communications Space time transmit diversity (9, 14, 17, 19) is applied at the block level to an original block of bits (12) in order to reduce the effects of fading in wireless communication systems that use nonlinear modulation schemes (13, 33). At the recei... | 08/08/2006 |
| 7088782 | Time and frequency synchronization in multi-input, multi-output (MIMO) systems In a communication system, and in particular a wireless Orthogonal Frequency Division Multiplexing (OFDM) communication system, the present invention provides systems for synchronizing data transmitted across a channel. The present invention may be used in a Multi-I... | 08/08/2006 |
| 7085307 | Methods and apparatus for transmitting data over a CDMA network The use of cyclic prefixes with OFDM transmissions is known. Typically the prefix length is chosen to be at least as long as the duration of significant multipath in the transmission channel. However, OFDM has disadvantages in terms of DSP load and transmitter power... | 08/01/2006 |
| 7082321 | Radio communication system using adaptive array antenna A radio communication system and method having an array antenna and a weighting arrangement that provides a downlink array weight for a downlink on the basis of information about bearings of a plurality of incoming signals received through a plurality of uplinks, an... | 07/25/2006 |
| 7082159 | Methods and arrangements in a telecommunications system A method and apparatus in a wireless communication system comprising at least one transmitter provided with at least two antennas and at least one receiving unit provided with at least one antenna and wherein training sequences are transmitted from the at least two ... | 07/25/2006 |
| 7079870 | Compensation techniques for group delay effects in transmit beamforming radio communication In a beamforming communication device, transmit weight vectors are iteratively processed to compensate for any group delay caused by receive synchronization in the receive device. The initial transmit weights are computed from signals transmitted by a second communi... | 07/18/2006 |
| 7079809 | Systems and methods for providing improved wireless signal quality using diverse antenna beams The present invention is directed to wireless communication, and more particularly, to providing improved signal quality using antenna beam selection and/or switching techniques. Embodiments of the present invention may measure the carrier-to-interference (C/I) leve... | 07/18/2006 |
| 7079514 | Mobile communication apparatus with antenna array and mobile communication method thereof A mobile communication apparatus with an antenna array and a mobile communication method therefore, wherein the apparatus includes a base station with an antenna array and a mobile station, wherein the mobile station determines a channel downlink characteristic for ... | 07/18/2006 |
| 7076228 | Interference reduction for multiple signals The present invention reduces the degradation in performance of one or more radio signals that are co-transmitted with a first radio signal from the same transmitting antenna in the same frequency channel and received by the same antenna due to multipath or other sh... | 07/11/2006 |
| 7072413 | 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... | 07/04/2006 |
| 7072409 | Space multiplex radio communication method and radio communication apparatus A radio communication system is comprised of: a transmitting system in which N transmission signals, frequency-converted to the same transmission frequency, are generated by N transmitters, N being an integer equal to or greater than 2, and the transmission signals ... | 07/04/2006 |
| 7072324 | Device and method for providing time switched transmission diversity in mobile communication system The invention provides a method and apparatus for transmitting signalling information to a receiver using a plurality of transmission antennas in a time switching configuration. The apparatus includes a controller for generating a switch controlling signal in a non-... | 07/04/2006 |
| 7072693 | Wireless communications structures and methods utilizing frequency domain spatial processing Wireless communications structures and methods are provided that utilize frequency domain spatial processing. Structure is included that receives and transmits signals from an array of Mβ antennas wherein the antennas are connected to M switches in groups of β. Ea... | 07/04/2006 |
| 7069052 | Data transmission method in base station of radio system, base station of radio system, and antenna array of base station The invention relates to a method and a base station of a radio system implementing the method and to an antenna array of the base station which enable both antenna diversity and beam forming using the same antenna array. In the solution described the antenna array ... | 06/27/2006 |
| 7069050 | Antenna transmission and reception system A transmitter of a base station includes a data serial-to-parallel converter, M modulators, M beam formers, and transmission antennas. The data serial-to-parallel converter converts transmission data into M sequences. Each modulator modulates the transmission data. ... | 06/27/2006 |
| 7065149 | Transmitter, the method of the same and communication system A transmitter, the method of the same, and a communication system using the scheme of space-time block coding employing the multiple beams to mitigate the multipath fading. A transmitter constituted array antennas first performs beams scanning employing beamforming ... | 06/20/2006 |
