Frequency control device and method for frequency synchronization with multiplex signal by OFDM, receiving device, and communication device

摘要

The present invention provides a frequency control device for following frequency deviation of OFDM (Orthogonal Frequency Division Multiplexing).On metrics obtained by discrete Fourier transform by a discrete Fourier transform section 1200, calculation is performed to decide which direction, upward or downward, a center of the energy distribution of the obtained metrics deviates from a theoretical center of frequency, to obtain a frequency difference, and an AFC signal in accordance with the frequency difference is generated in the control signal generating section 1350.