DPSK diversity systems performance in the presence of shadowing

In this paper we consider different systems employing DPSK digital signaling with implemented macroscopic and microscopic techniques and compare different microscopic selection methods where dependence to BER of the average SNR/bit is used as the measure of the performances. As the shadowing is stronger, and as the number of ports is decreasing, the difference between performances of different employed microdiversity systems becomes less evident, and improvements become slower.