Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N−1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.

The present technology relates to a reception apparatus, a reception method, and a program capable of improving performance in diversity. The reception apparatus includes a plurality of demodulation units configured to demodulate a supplied branch and generate a symbol and a synthesis unit configured to synthesize the symbol demodulated by the plurality of demodulation units, in which the synthesis unit sets a predetermined time from arrival time of a first-arriving symbol as a search range, and synthesizes a symbol that arrives within the search range and the first-arriving symbol. The present technology can be applied to a mobile terminal apparatus that receives television broadcasting or the like with diversity system.

The present technology relates to a reception apparatus, a reception method, and a program capable of improving performance in diversity. The reception apparatus includes a plurality of demodulation units configured to demodulate a supplied branch and generate a symbol and a synthesis unit configured to synthesize the symbol demodulated by the plurality of demodulation units, in which the synthesis unit sets a predetermined time from arrival time of a first-arriving symbol as a search range, and synthesizes a symbol that arrives within the search range and the first-arriving symbol. The present technology can be applied to a mobile terminal apparatus that receives television broadcasting or the like with diversity system.

Disclosed herein are a terminal and an operation method thereof in a MIMO system. The terminal may use a reference signal for channel state measurement from a base station to calculate a first value that is a ratio of a signal transmitted from the base station to noise and a second value that is a ratio of interference from the base station and the noise. Further, the terminal may generate bit information by comparing a ratio of the second value and the first value with a predetermined threshold value and feedback the first value and the bit information to the base station.

Provided is a data transmission method using physical network coding in a relay station. The method may include an operation of receiving a first signal and a second signal from first and the second nodes, respectively, an operation of generating a third signal to which a physical network coding is applied based on the first signal and the second signal, an operation of forming a beam which maximizes a lower effective power between effective power of the first channel between the relay station and the first node and effective power of the second channel between the relay station and the second node, and an operation of transmitting the third signal to the first node and the second node based on the beam.

A method of detecting sequences of multi-level encoded symbols. The multi-level encoded symbols are mapped and modulated with a modulation scheme having a number of constellation points identified by a sequence of bits arranged in at least a first and a second group. The first group is encoded with a first encoding scheme, and the second group is encoded with a second coding scheme, and the multi-level encoded symbols are transmitted by multiple transmitting sources and received as a received vector by multiple receiving elements. A first set of candidate sequences is selected and a first set of probability information is calculated for the first set of candidate sequences. Then the first group of bits of the symbols are decoded. The decoded bits of the first group are re-encoded and used to select a sub-set of constellation points. A second set of candidate sequences is selected based on this sub-set of constellation points and a second set of probability information is calculated for the second set of candidate sequences. Finally, the second group of bits of the symbols are decoded.

The present disclosure discloses a data transmission method, device, and system. The method includes: receiving, by a cooperation device and a target device, to-be-transmitted data sent by a network side device. A first moment is defined as the moment when the target device feeds back, to the network side device, whether the to-be-transmitted data is correctly received is defined as a first moment. Before the first moment, the cooperation device is configured to send the to-be-transmitted data to the target device. And the target device is configured to receive, process and check the to-be-transmitted data sent by the cooperation device before the first moment.

The present disclosure discloses a data transmission method, device, and system. The method includes: receiving, by a cooperation device and a target device, to-be-transmitted data sent by a network side device. A first moment is defined as the moment when the target device feeds back, to the network side device, whether the to-be-transmitted data is correctly received is defined as a first moment. Before the first moment, the cooperation device is configured to send the to-be-transmitted data to the target device. And the target device is configured to receive, process and check the to-be-transmitted data sent by the cooperation device before the first moment.

A WAP including: a spatial mapper component, a partial sounding feedback expander circuit and a beamforming matrix calculator. The spatial mapper component spatially maps the transmission of a single MIMO sounding packet with either a single full spatial mapping matrix (SMM) or a set of “N” partial SMM responsive respectively to a full or composite sounding mode designation. The partial sounding feedback expander circuit in the composite sounding mode, expands partial sounding feedback received from a targeted station in response to the single MIMO sounding packet into a full sounding feedback. The beamforming matrix calculator calculates a full beamforming matrix for transmitting downlink communications to the targeted station from the full sounding feedback provided by either the partial sounding feedback expander circuit in the composite sounding mode, or the full sounding feedback received directly from the targeted station in the full sounding mode.

A method and system for optimizing the performance of spatial multiplexing techniques in MU-MIMO wireless systems comprising subsectors where the presence of significant correlation between antenna elements can impair the performance of MU-MIMO techniques. The proposed solution ensures optimum selection of a specific combination of transmit antenna elements and receive antenna elements that maximizes MU-MIMO performance.