Compensation of sampling frequency offset and local oscillator frequency offset in an OFDM receiver

摘要

A partial Fourier Transform is performed, preferably using Goertzel's algorithm, to calculate two frequency bins. A phase variation is calculated for each bin, the phase variation preferably representing the phase difference between the bin calculated by a Fourier Transform performed on samples in a guard interval and the bin calculated by a Fourier Transform performed on matching samples within the useful part of the symbol. The sampling frequency offset is compensated by taking the difference between the phase variations.