Patent ID: 8666003
Filing Date: 2014-03-04
Classification: H04J,H04L

Abstract:
1. A reception device which demodulates information from a received signal; the reception device comprising: a propagation channel estimation unit configured to estimate channel impulse responses at a plurality of times in an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and estimate a frequency response based on the channel impulse responses at the plurality of times; a symbol replica generation unit configured to generate a symbol replica which is a modulated symbol from a demodulated information; a filter unit configured to generate a received signal replica which is a replica of the received signal in a time domain, based on the channel impulse responses at the plurality of times and the symbol replica; a subtraction unit configured to subtract the received signal replica from the received signal; a time-to-frequency transformation unit configured to convert a signal obtained based on the signal subtracted by the subtraction unit into a frequency-domain signal; a reconstruction unit configured to generate a replica signal of a desired signal, based on the frequency response and the symbol replica, add the replica signal of the desired signal with respect to the frequency-domain signal converted by the time-to-frequency transformation unit, and extract each of subcarrier components from the received signal; and a demodulation unit configured to demodulate a signal of the each of the subcarrier components extracted by the reconstruction unit.