Diversity MPSK receivers in cochannel interference

The performance of M-ary phase shift keying (MPSK) in the presence of cocha nnel interference in microcellular radio environments is analyzed. Average bit error rates (BER's) of MPSK using both dual-branch equal gain combining (EGC) and dual-branch selection combining (SC) are derived assuming that t he desired signal experiences frequency-nonselective Ricean or Nakagami fad ing and the multiple interferers experience independent frequency-nonselect ive Rayleigh fading. Nyquist pulses are used, and perfect coherent detectio n is assumed at the receiver. The accuracy of the Gaussian interference app roximation for diversity receivers is also assessed.