Error Probability Bounds for M-ary DPSK Signaling over Doubly Selective Fading Diversity Channels

A method is described for obtaining tight closed-form bounds on the probability of error for M-ary differential phase-shift keying and Rician fading diversity channels. The channels exhibit doubly selective fading. In addition, the gains of the diversity channels are correlated. As an example, the results of applying this technique are given for 16-ary DPSK signaling.