| 摘要 |
A receiving apparatus according to the present invention is a receiving apparatus that demodulates a modulated signal received via a plurality of antennas, and includes a transmission-channel estimating unit (22) that estimates a transmission-channel response matrix in accordance with the quantity of antennas and the quantity of symbols based on a received signal vector; a hard-decision sequence estimating unit (21) that estimates a hard decision sequence based on the received signal vector and the transmission-channel response matrix, and outputs the hard decision sequence and likelihood information ± corresponding to the hard decision sequence; and a soft-decision value creating unit (23-1 to 23-K) that creates likelihood information ² corresponding to a sequence that a specific bit in the hard decision sequence is inversed by using the received signal vector, a transmission-channel response matrix reconstructed by reducing the dimension of the transmission-channel response matrix, and the hard decision sequence, and creates a soft decision value of the hard decision sequence based on the likelihood information ² and the likelihood information ±.
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