Patent ID: 8477865
Filing Date: 2013-07-02
Classification: H04B,H04L

Abstract:
1. A MIMO receiving apparatus having a MIMO (Multiple Input Multiple Output) function of receiving, by a plurality of receiving antennas, transmission signals transmitted from a plurality of transmitting antennas, and outputting the transmission signals demultiplexed from reception signals based on equalization weights of arbitrary subcarriers generated from the reception signals, comprising: a coherent bandwidth calculation unit that calculates a coherent bandwidth based on a channel response in a time domain obtained from the reception signals for each path between the transmitting antennas and the receiving antennas; a weight calculation control unit that determines target subcarriers of equalization weight calculation based on the coherent bandwidth; a weight calculation unit that calculates the equalization weight of each target subcarrier based on a channel estimation value in a frequency domain obtained from the reception signals for each path between the transmitting antennas and the receiving antennas; a weight interpolation unit that interpolates the equalization weights so as to calculate equalization weights for the subcarriers that have not undergone equalization weight calculation yet; a power variation detection unit that detects a power variation of each subcarrier, wherein said power variation detection unit determines a detection threshold from an average reception power in the frequency domain at a coherent bandwidth interval, compares the detection threshold with a reception power of each subcarrier within the coherent bandwidth, and detects, as a detected subcarrier, a subcarrier whose reception power is not more than the detection threshold or not less than the detection threshold.