Patent ID: 7466645
Filing Date: 2008-12-16
Classification: H04B,H04L

Abstract:
1. An OFDM signal receiving apparatus for diversity reception of an OFDM signal with a plurality of antennas, the OFDM signal containing Y sub-carriers, where Y is a positive number satisfying 2 X−1 <Y<2 X and X is a positive number greater than 1, the apparatus comprising: a plurality of receiving systems each independently operable to demodulate the OFDM signal received with a respective one of the antennas; and a diversity processing unit connected to the receiving systems and fed with sequences of data on sub-carriers demodulated by the respective receiving systems, wherein at least one of the receiving systems includes an FFT circuit operable to Fast Fourier transform, in parallel, only a sequence of data on 2 at least another of the receiving systems demodulates a sequence of data on some or all of said 2 the respective receiving systems demodulate sequences of data so as to together cover all the Y sub-carriers, and the diversity processing unit performs a diversity process on the sequences of data on sub-carriers, out of all the Y sub-carries, redundantly demodulated by two or more of the receiving systems.