Abstract
This paper derives a simple general closed form expression of the bit error probability for differentially detected signals with post-detection equal gain combining in additive white Gaussian noise and slow frequency nonselective fading channels. The derived expression is then used to study the performance of Gaussian minimum shift keying (GMSK) and quadrature Differential phase sift keying (QDPSK) signals when transmitting over non-identical and correlated Weibull fading channels in which each diversity branch can have unequal signal to noise ratio (SNR) and different severity parameter β as well.
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