Performance Analysis of Partially Coherent BPSK in the Presence of ISI

In this paper, we analyze the performance of coherent BPSK systems in the presence of ISI and carrier phase error. We consider diversity system with L-branch signals that being detected using postdetection equal-gain combining (EGC) receiver. The diversity branches are assumed to experience slow, flat, and uncorrelated fades. Two performance criteria are considered: the average bit-error probability (BEP) and the signal-to-noise ratio (SNR) gain penalty due to the sampling time jitter. The analytical results are presented along with results obtained by using quasi-analytical simulation technique.