Patent ID: 7133458
Filing Date: 2006-11-07
Classification: H04H,H04L

Abstract:
1. A receiving apparatus for multiplex communication based on multi-carrier modulation where subcarriers of a plurality of channels are cyclically arranged, comprising: receiving means for receiving a group of signals; a signal component demultiplexing apparatus having a plurality of branching circuits connected in stages and hierarchically by a branching method, each of the plurality of branching circuits provided with: symbol delaying means for delaying an input group of signals by N/2 m is a parameter indicating a position of a stage of each of the branching circuits; N is a number of symbols existing within one modulation time; and k is a parameter indicating that a group of signals having a frequency offset of a subcarrier is input with the reference of 0 Hz; signal selecting means for selecting and outputting one group of symbols of predetermined subcarriers from among the symbol strings demultiplexed at the signal component demultiplexing apparatus; frequency offset compensating means for compensating for a frequency offset of the one group of symbols selected and output by the signal selecting means; two orthogonal transforming means for orthogonally transforming output signals of the frequency offset compensating means; and decoding means for decoding the orthogonally transformed signal.