FREQUENCY-DOMAIN EQUALIZATION OF OFDM SIGNALS OVER FREQUENCY NONSELECTIVE RAYLEIGH FADING CHANNELS

Abstract

In orthogonal frequency division multiplexing (OFDM) signal transmission via a frequency nonselective fading channel, multiplicative distortion in the time domain acts as intersymbol interference (ISI) in the frequency domain. The Letter proposes new compensation methods for the fading distortion in OFDM signals, in which compensation is achieved in the frequency domain. With the proposed methods, improved results can be obtained compared to previous schemes. The symbol error rate (SER) of each proposed scheme is obtained by baseband simulation.