OFDM COMMUNICATION APPARATUS AND METHOD FOR PROPAGATION PATH ESTIMATION

摘要

A baseband signal generated from a received signal is compensated for propagation path distortion by using a propagation path estimate determined by a propagation path estimation/compensation circuit (104). The information bit string after compensated for the propagation path distortion is periodically sent to a hard decision circuit (107), and subjected to hard decision processing. The thus hard-decided information symbol is sent to the propagation path estimation/compensation circuit (104), and the propagation path is estimated by using the hard-decided information symbol as a known signal, which is complex-multiplied by an FFT-computed signal to determine propagation path estimate and to obtain propagation path estimation value. This propagation path estimate is substituted for the initial propagation path estimate.