Abstract
This paper presents some closed-form bit error probability expressions for coherent demodulation of both Gray coded and differentially decoded Gray coded QAM modulations in nonfading and frequency nonselective Rayleigh fading channels. These results demonstrate that as QAM constellation sizes get larger the BEP degradation due to differential encoding and decoding becomes negligible.
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Fitz, M.P., Seymour, J.P. On the bit error probability of QAM modulation. Int J Wireless Inf Networks 1, 131–139 (1994). https://doi.org/10.1007/BF02106515
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DOI: https://doi.org/10.1007/BF02106515