Effect of channel estimation errors on the performance of two MPSK detection schemes subject to Rayleigh fading

This paper presents a performance analysis of two MPSK detection schemes for flat Rayleigh fading channels with imperfect channel estimation. Closed-form expressions for the bit error probability (BEP) of both schemes are presented considering QPSK modulation and for higher level MPSK modulation, such as 8PSK, 16PSK and 32PSK, the BEP is obtained by simulation. It is shown that they present the same error probability even in the absence of ideal channel estimation and a complexity analysis is carried out to determine the best scheme in terms of the number of operations (multiplications, divisions, subtractions and comparisons) executed by each detector.