Patent ID: 8509327
Filing Date: 2013-08-13
Classification: H04L

Abstract:
1. A receiving apparatus comprising: preamble analysis means for receiving a frame of Digital Video Broadcasting-Terrestrial 2 made up of an Orthogonal Frequency Division Multiplexing signal and analyzing a preamble contained in the received frame; offset detection means for detecting a first fine carrier frequency offset and a coarse carrier frequency offset on the basis of the analyzed preamble; carrier frequency correction means for executing carrier frequency correction on an Orthogonal Frequency Division Multiplexing time domain signal obtained by quadrature demodulation on the basis of the detected first fine carrier frequency offset and the detected coarse carrier frequency offset; determination means for determining whether the detection of said coarse carrier frequency offset has been completed; and control signal output means for, when the detection of said coarse carrier frequency offset is determined to be completed, outputting a control signal for feeding back a second fine carrier frequency offset detected on the basis of an Orthogonal Frequency Division Multiplexing frequency domain signal obtained by applying Fast Fourier Transform computation to an output of said carrier frequency correction means, wherein, when the detection of said coarse carrier frequency offset is determined to be completed, said control signal output means further outputs a control signal for feeding back a sampling error detected on the basis of said Orthogonal Frequency Division Multiplexing frequency domain signal to a sampling means for sampling said Orthogonal Frequency Division Multiplexing time domain signal.