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We present bit error rate (BER) expressions of pi/4 shifted differential quadrature phase shift keying (pi/4-DQPSK) with single and multi-channel reception over generalized fading channels in presence of additive white Gaussian noise (AWGN). Slow flat small scale statistical fading models, namely Rayleigh, Rician, Nakagami-m and Hoyt fading has been assumed. Moreover, to improve the link quality receiver...
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