Patent ID: 8705492

Claim:
A MIMO receiving apparatus comprising: a plurality of receiving antennas that receive a spatially multiplexed signal transmitted from a plurality of transmitting antennas; an estimation section that estimates a channel matrix between the plurality of transmitting antennas and the plurality of receiving antennas; a separation section that separates the spatially multiplexed signal into a plurality of streams based on a submatrix corresponding to a numerator of a stream separation matrix that is determined by the channel matrix and an interference canceller scheme and equalizes a phase and amplitude of the spatially multiplexed signal; a calculation section that calculates a denominator of the stream separation matrix; a correction section that corrects a threshold determined according to a modulation scheme of the spatially multiplexed signal using the denominator of the stream separation matrix; a demapping section that calculates likelihoods of the plurality of streams through a threshold decision using the corrected threshold; a weighting factor deriving section that determines a weighting factor proportional to respective signal-to-noise power ratios of the plurality of streams; and a weighting section that weights the likelihoods using the weighting factor.