Patent ID: 7561614

Claim:
A communication apparatus of a multicarrier transmission system, which carries out data transmission by digital modem processing, comprising: a receiver which receives a transmission signal including a pilot symbol configured by at least one symbol to which contiguous identical data is given; and a demodulator which carries out digital multi carrier demodulation processing of the transmission signal received by said receiver by use of a filter bank subjecting wavelet transformation, wherein, in case that a filter length, which is included in said filter bank subjecting the wavelet transformation, is assumed to be K symbols, said pilot symbol is composed of at least contiguous 2K−1 symbols to which the contiguous identical data is given, and said receiver obtains complex information by demodulating K-th symbol or later, out of at least 2K−1 symbols to which said contiguous identical data, which is included in said pilot symbol, is given.