Patent ID: 8792595

Claim:
A wireless communication device comprising: a plurality of receiving antennas; an estimation unit configured to estimate information of a multiplicity of channels based on receiving signals received through the receiving antennas, the number of the channels being a product of the number of transmission antennas of a transmitting side transmitting transmission signals and the number of the receiving antennas; a candidate generation unit configured to generate, before performing a metric computation, pseudo-transmission signal point candidates based on an arrangement of plural transmission signal point candidates, each of the pseudo-transmission signal point candidates being representative of a part of the plural transmission signal point candidates and positions of the pseudo-transmission signal point candidates being different from those of the plural transmission signal point candidates; a replica generation unit configured to generate receiving signal replicas for each of the receiving antennas based on the pseudo-transmission signal point candidates and the information of the channels; a metric computation unit configured to perform the metric computation based on the generated receiving signal replicas and the receiving signals to select a part of the pseudo-transmission signal point candidates having a greater effect on calculation of likelihoods; a likelihood computation unit configured to revert each of the selected pseudo-transmission signal point candidates to a corresponding part of the transmission signal point candidates to calculate final likelihoods; and a restoration unit configured to restore the transmission signals based on the calculated likelihoods.