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| Number | Title | Issue Date |
| 8111770 | High-bandwidth over-the-air signal processing An electronic MIMO-OFDM carrier frequency recovery method is disclosed. The method includes receiving a wirelessly propagated time-domain signal observation, estimating a data-channel vector from a latest observation vector by correcting for a phase rotation effect ... | 02/07/2012 |
| 8111773 | Transmission method for multiple antenna system A transmission method for a multiple antenna system including a first device having M (>1) transmitting antennas and a second device having N (>1) receiving antennas is disclosed. The method includes determining whether there is a multiple-input multiple-output (MIM... | 02/07/2012 |
| 8111771 | Wireless communication apparatus and method using beamforming A wireless transmitting method includes calculating a beamforming channel matrix which is a channel matrix generated at a time when a transmitting apparatus applies a beamforming matrix to a data signal and transmits the data signal to receiving apparatuses, selecti... | 02/07/2012 |
| 8111775 | Communication device adopted for multi-input multi-output orthogonal frequency division multiplexing system and method thereof A communication device adopted for a multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) system and a method thereof are provided. The MIMO-OFDM system comprises the communication device and a corresponding communication device, and they ... | 02/07/2012 |
| 8111772 | Method and apparatus for multi-antenna transmitting based on spatial-frequency encoding The present disclosure relates to communication technologies and discloses a method and apparatus for multi-antenna transmitting based on spatial-frequency encoding. The method includes: performing spatial-frequency encoding on input data and outputting encoded data... | 02/07/2012 |
| 8111774 | Method for transmitting/receiving signal in MIMO system Disclosed is a method for transmitting a signal in a mobile communications system using a plurality of transmit/receive antennas. A method for transmitting a signal in accordance with an embodiment of the present invention comprises the steps of: a receiving end's c... | 02/07/2012 |
| 8107550 | Methods for precoding signals for transmission in wireless MIMO system Methods discussed herein provide more efficient precoding matrices for precoding signals prior to transmission. The methods discussed herein improve throughput in wireless MIMO systems. Methods discussed herein are applicable to frequency division duplexing (FDD) sy... | 01/31/2012 |
| 8107549 | Multi-stage receiver for wireless communication Techniques for receiving a MIMO transmission are described. A receiver processes received data from multiple receive antennas in multiple stages. A first stage performs front-end filtering/equalization on the received data with a front-end filter to process non on-t... | 01/31/2012 |
| 8102931 | Method and device for operating a precoded MIMO system A method is provided for generating precoder data (600), comprising: obtaining transmit power data indicative of a transmit power of a plurality of multiple-input/multiple-output signals (610); obtaining signal quality data, the signal quality data inc... | 01/24/2012 |
| 8102933 | Transmit diversity scheme The present invention relates to methods for implementing transmit diversity in a telecommunication network. In particular there is provided an algorithm for performing transmit diversity encoding in a transmitter (100) and transmit diversity decoding in a re... | 01/24/2012 |
| 8102935 | Estimation of data-to-pilot ratio in a wireless communication system Techniques for estimating data-to-pilot ratio are described. A terminal may receive pilot sent to multiple terminals and may receive data sent specifically to the terminal. The terminal may estimate channel gain and noise variance based on the received pilot. The te... | 01/24/2012 |
| 8102932 | Method and apparatus for de-mapping symbol in multi-input multi-output communication system A method and an apparatus for de-mapping symbols in a Multi-Input Multi-Output (MIMO) system are provided. In the present invention, an estimated channel effect and a plurality of received data symbols are used to estimate a plurality of transmitted data symbols. A ... | 01/24/2012 |
| 8102934 | Transmitting apparatus and method A transmitting apparatus includes a subset matrix setting unit to set a subset matrix corresponding to a channel matrix with respect to each of a plurality of antennas of at least one of a plurality of user terminals, using channel matrices fed back from the plurali... | 01/24/2012 |
| 8098756 | MIMO antenna apparatus capable of diversity reception using one radiating conductor A MIMO antenna apparatus is provided with: an upper housing having slits; first feed points through which the upper housing itself is excited as first antennas; second feed points through which the slits are excited as second antennas; switch, each of which is conne... | 01/17/2012 |
| 8098755 | Method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook A method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook may include a processor in a node B that enables generation of an interference cancellation matrix (WR). The interference ca... | 01/17/2012 |
| 8098754 | Midamble allocations for MIMO transmissions Allocation of multiple training sequences transmitted in a MIMO timeslot from multiple transmit antenna elements is provided. For example, a method of generating signals in a MIMO timeslot, the method comprising: selecting a first training sequence; preparing a firs... | 01/17/2012 |
| 8094743 | Spatial modulation method and transmitting and receiving apparatuses using the same in a multiple input multiple output system A spatial modulation method and transmitting and receiving apparatuses using the spatial modulation method in a MIMO system are provided. The spatial modulation method uses an index of an activated antenna and a signal modulation constellation as an information sour... | 01/10/2012 |
| 8094744 | System and method of selecting a data detection technique for a multiple-input multiple-output (MIMO) system A system and method of selecting a data detector alternately implement different data detection techniques such as maximum likelihood, zero forcing, and minimum mean square error. Selection of a particular technique may depend upon various factors. In some implement... | 01/10/2012 |
| 8090041 | Systems and methods for forward link closed loop beamforming Methods of forming a beam to a wireless terminal from a transmitter including an antenna having a plurality of antenna feed elements include generating channel estimates at the wireless terminal, obtaining channel phase information from the channel estimates, quanti... | 01/03/2012 |
| 8090045 | Data stream interleaving with non-monotonically arranged data rotations for spatially diverse transmission Systems and techniques relating to processing multiple data streams transmitted over a wireless channel. In general, according to at least one implementation, a technique includes: obtaining data streams to be transmitted over a wireless channel using spatially dive... | 01/03/2012 |
| 8090043 | Apparatus and methods for compensating for signal imbalance in a receiver Apparatus, methods and systems for compensating for an I/Q imbalance may include compensating for an imbalance between a first component of a data signal and a second component of the data signal. The data signal may be modulated by a carrier signal having a frequen... | 01/03/2012 |
| 8090039 | Wireless transceiver and wireless transmitting/receiving method and program thereof The present invention is provided with a wireless transceiver and wireless transmitting/receiving method and program thereof capable of improving the robustness against Doppler frequency by containing transmit diversity signals in one spreading region. In the presen... | 01/03/2012 |
| 8090042 | Channel randomization and time diversity for MIMO system A method is provided for creating an artificial a fast fading channel in a MIMO communication system. The method includes encoding a series of source data to generate a first plurality of encoded output signals and multiplying the first plurality of encoded output s... | 01/03/2012 |
| 8090040 | Method and system to maintain shapes of temporal pulses in wireless broadband signals transmitted through a dispersive antenna A radio frequency system for broadband wireless communication including one or more dispersive antennae operable to transmit and receive wireless broadband signals having a wide range of frequencies and one or more equalizers each in communication with a respective ... | 01/03/2012 |
| 8090044 | Multimode transceiver for use with multiple antennas and method for use therewith A wireless transceiver includes a plurality of antennas. A plurality of signal recovery circuits generate a selected number of received signals from a first subset of the plurality of antennas, based on a control signal. A receiver section recovers an inbound data s... | 01/03/2012 |
| 8085864 | Midamble allocations for MIMO transmissions Allocation of multiple training sequences transmitted in a MIMO timeslot from multiple transmit antenna elements is provided. For example, a method of generating signals in a MIMO timeslot, the method comprising: selecting a first training sequence; preparing a firs... | 12/27/2011 |
| 8081700 | Power allocation method for MIMO transmit beamforming A transmit power allocation method for computing a transmit beamforming W matrix for a N streams of data, the method has a first step of measuring a receive channel characteristic H matrix, a second step of decomposing the H matrix into a U matrix which is formed fr... | 12/20/2011 |
| 8081698 | Method and apparatus for selection mechanism between OFDM-MIMO and LFDM-SIMO Systems and methodologies are described that facilitate switching between various combinations of MIMO, SIMO, SISO and OFDM, LFDM and IFDM. According to various aspects, a method for a wireless communication network is provided that includes: receiving a first set o... | 12/20/2011 |
| 8081702 | Radio communication system, radio communication device, and channel correlation matrix decision method It is possible to prevent lowering of a throughput of a radio communication system even when propagation path environments of an uplink line and downlink line are asymmetric. A maximum proper value calculation unit (115) calculates a maximum proper value from... | 12/20/2011 |
| 8081697 | Detection complexity reducing apparatus and method in multiple input multiple output (MIMO) antenna system An apparatus and method for lowering a tree searching complexity in a Spatial Multiplexing (SM) Multiple Input Multiple Output (MIMO) antenna system are provided. A transmitting apparatus includes a generator for generating a plurality of transmit streams by spatial... | 12/20/2011 |
| 8081703 | Communication apparatus and communication method Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S2(i) and S2(i+1) obtained from different data are transmitted at time i and time i+1 respecti... | 12/20/2011 |
| 8081699 | Wireless communication system and method with elliptically polarized radio frequency signals In one embodiment, a UWB transmission system includes a pair of crossed linearly polarized antennas, one of which is fed with a UWB signal current, while the second is fed with a temporally orthogonal UWB signal such as the time-derivative of the UWB signal current.... | 12/20/2011 |
| 8081701 | Method for sending and receiving communication signals, and apparatuses for sending and receiving communication signals In a method for sending communication signals, space-time block coding is performed by dividing a data stream of complex-value data symbols into a number KT>2 of partial data streams of respectively n>2 data symbols. The data symbols in the partial data s... | 12/20/2011 |
| 8077793 | System and method for space-frequency rate control in a MIMO wireless communication network A base station that communicates with subscriber stations in an OFDM wireless network. The base station transmits a first data stream and a second data stream to a subscriber station using a first virtual antenna and a second virtual antenna. The base station alloca... | 12/13/2011 |
| 8077794 | Reception device, communication control method in mobile communication system A reception device for use in a mobile communication system having a mobile station and a radio base station to which transmission diversity for transmitting transmission signals using a plurality of antennas is applied in a downlink to the mobile station, is disclo... | 12/13/2011 |
| 8077792 | Method and apparatus for allocating transmission power in communication system with multiple antennas In a method for allocating transmission power in a communication system including multiple antennas, a plurality of subcarriers are grouped by a plurality of groups, and each group includes at least one subcarrier. A transmission power weight and an antenna transmis... | 12/13/2011 |
| 8073069 | Multi-user MIMO-SDMA for finite rate feedback systems A multi-user MIMO downlink beamforming system with limited feedback (200) is provided to enable preceding for multi-stream transmission, where a channel codeword (ui) and one or more channel quality indicator values (CQIA, CQIB | 12/06/2011 |
| 8073068 | Selective virtual antenna transmission Techniques for transmitting data from virtual antennas instead of physical antennas are described. Each virtual antenna may be mapped to some or all physical antennas by a different mapping. The performance of different sets of at least one virtual antenna is evalua... | 12/06/2011 |
| 8073072 | Multiple-input multiple-output system and method A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may â€... | 12/06/2011 |
| 8073070 | Multi-pilot generation method and detection method in multi-antenna communication system Provided are a multi-pilot generation method and a detection method in a multi-antenna communication system. In the method, a transmission side superimposes a first preamble sequence and a third preamble sequence to generate a second preamble sequence, which is subj... | 12/06/2011 |
