REDUCED COMPLEXITY FFT WINDOW SYNCHRONIZATION FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM

摘要

PURPOSE: An orthogonal frequency division multiplexing system is provided to reduce the complexity. CONSTITUTION: An OFDM(Orthogonal Frequency Division Multiplexing) receiver extracts(62) a pilot from an OFDM signal subjected to FFT(Fast Fourier Transform,56) and equalization(58) and applies a processing for the extraction of an FFT window adjustment factor(65) and a related equalizer tap adjustment(67) so as to compensate an FFT window drift. The OFDM receiver uses the extracted FFT adjustment factor and equalizer tap adjustment to simultaneously control a position of the FFT window and a phase of the equalizer tap.