Systematic study of channel non-symmetry for differentially coherent detection in general Rician fading channels

A study is presented into the phenomenon of differing BEPs for different sy mbols transmitted (termed channel non-symmetry) for binary and quaternary d ifferential phase shift keying (2/4-DPSK) in arbitrarily correlated multipa th Rician fading channels. The systematic study is facilitated by the momen t generating function (MGF) of the decision statistic of 2/4-DPSK. The work unifies many of the previously published results for channel nonsymmetry a nd gives new insight into the problem.