SAMPLING FREQUENCY OFFSET ESTIMATION APPARATUS AND METHOD, RECEIVER FOR OFDM SYSTEM AND PHASE DISTORTION CORRECTION METHOD THEREOF

摘要

PPROBLEM TO BE SOLVED: To provide a sampling frequency offset estimation apparatus and method to be applied to an OFDM (orthogonal frequency division multiplexing) system, in which a sampling frequency offset can be accurately estimated by computing not an average phase change rate of pilot subcarriers but a phase change rate for each pilot subcarrier. PSOLUTION: A sampling frequency offset estimation apparatus according to the present invention includes: a phase calculator 610 calculating phase shifts of pilot subcarriers contained in a sampled received signal which has been transformed into a frequency domain; a determiner 620 calculating phase shift reaching times at which samples of the pilot subcarriers shift due to the phase shift; a time offset calculator calculating a sampling time offset using the pilot subcarriers; and a frequency offset calculator calculating a sampling frequency offset based on the phase shift reaching times and the sampling time offset. PCOPYRIGHT: (C)2007,JPO&INPIT