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High SNR BER Comparison of Coherent and Differentially Coherent Modulation Schemes in Lognormal Fading Channels (1407.7097v1)
Published 26 Jul 2014 in cs.IT and math.IT
Abstract: Using an auxiliary random variable technique, we prove that binary differential phase-shift keying and binary phase-shift keying have the same asymptotic bit-error rate performance in lognormal fading channels. We also show that differential quaternary phase-shift keying is exactly 2.32 dB worse than quaternary phase-shift keying over the lognormal fading channels in high signal-to-noise ratio regimes.