WIRELESS COMMUNICATIONS SYSTEM, WIRELESS COMMUNICATIONS APPARATUS, WIRELESS COMMUNICATIONS METHOD AND COMPUTER PROGRAM FOR WIRELESS COMMUNICATION

摘要

In performing SVD-MIMO transmission, a set-up procedure is simplified while assuring a satisfactory decoding capability with a reduced number of antennas. A transmitter estimates channel information based on reference signals sent from a receiver, determines a transmit antenna weighting coefficient matrix based on the channel information, calculates a weight to be assigned to each of components of a multiplexed signal, and sends, to the receiver, training signals for respective signal components, the training signals being weighted by the calculated weights. On the other hand, the receiver determines a receive antenna weighting coefficient matrix based on the received training signals.

主权项

1. An electronic device having a first spatial multiplexing decoding capability, the electronic device comprising:
circuitry configured to receive and process a data packet including, in sequential order, preamble signals, training signals and data signals, wherein the training signals are weighted by weights included in a weight matrix for spatial multiplexing, the weight matrix being set to weight the data signals to be transmitted on an Orthogonal Frequency-Division Multiplexing (OFDM) sub-carrier from another electronic device to the electronic device, the training signals being received from the another electronic device before the data signals on the sub-carrier, the preamble signals are for use of at least one of signal detection, synchronization or adjustment of gain at the electronic device, the training signals are used to estimate channel state, and a number of the training signals which are sequentially received is based on information associated with the spatial multiplexing decoding capability being transmitted to the another electronic device before receiving the data packet.