Performance Analysis of OFDM Systems with Gaussian Distributed Phase and Frequency Offsets

Abstract

In this paper, a theoretical analysis to evaluate the performance of Orthogonal Frequency Division Multiplexing (OFDM) systems under the combined influence of Phase Offset and Frequency Offset over Rayleigh, Weibull and Nakagami fading channels using Binary Phase Shift Keying (BPSK) Modulation is presented. The performance of an OFDM system is degraded by both the Frequency Offset and the Phase Offset. The degradation of Bit Error Rate (BER) caused by the presence of Phase Offset and Frequency Offset is analytically evaluated. Hence, closed form expressions are derived to compute the BER with Rayleigh, Weibull and Nakagami fading channels assuming Gaussian probability density function of the Frequency Offset and Phase Offset. BER performance results are evaluated numerically following the analytical approach.