Orthogonal frequency division multiplexed signal generating apparatus and method, a demodulation apparatus, the communication apparatus, an orthogonal frequency division multiplexed signal generating program storage medium is stored and demodulation program is stored the storage medium

摘要

PROBLEM TO BE SOLVED: To provide the frequency controller that produces an automatic frequency control AFC signal used to trace a frequency deviation of an orthogonal frequency division multiplex OFDM signal. ;SOLUTION: Cross point of two high and low envelopes of an energy distribution of metrics obtained by applying discrete Fourier transform to an OFDM signal by a discrete Fourier transform section 1200 is estimated through calculation by an arithmetic processing section 1322, and a difference from a theoretical frequency center and a control signal generating section 1350 generates an automatic frequency control AFC signal in response to the frequency difference.;COPYRIGHT: (C)1999,JPO