Patent ID: 7672221
Filing Date: 2010-03-02
Classification: H04L,H04W

Abstract:
1. An OFDM receiver used in a communication system in which multiple radio communication apparatuses communicate in sync with each other using a same frequency band, comprising: an initial timing setting unit configured to define an FFT window for performing fast Fourier transform; an FFT unit configured to perform the fast Fourier transform on a received signal; and a timing error detection unit configured to determine error information based on a difference between receiving timing of a desired signal from a counterpart transmitter and receiving timing of an undesired signal from a non-counterpart transmitter, the timing error detection unit including wherein if the frequency band is divided into multiple frequency blocks, each block including one or more subcarriers, the timing error detection unit determines a first receiving timing of the undesired signal using a first frequency block used by the desired signal and a second receiving timing of another undesired signal using a second frequency block not used by the desired signal, and the timing error detection unit further includes weighting and combining means for weighting and combining the first and second receiving timings of the undesired signals.