SIMPLIFIED ERROR BOUND ANALYSIS FOR M-DPSK IN FADING CHANNELS WITH DIVERSITY RECEPTION

An extremely tight upper bound symbol error probability is developed f or M-DPSK over a Rician channel, incorporating the effects of AWGN, fa ding bandwidth and fixed Doppler shift (for the line-of-sight componen t). In addition, the error probability has also been determined in the above channels with the use of post-detection diversity combining. Th e bounds are shown to be in excellent agreement with the exact solutio ns produced by previous authors using numerical computation techniques for both the Rician and Rayleigh fading channels. For the case of AWG N channel, the bound is reduced to that published elsewhere in the lit erature. The technique is also shown to be capable of formulating the exact fading bit error probability for both binary and quaternary DPSK .