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Abstract: A practical communication channel often suffers from constraints on inputother than the average power, such as the peak power constraint. In order tocompare achievable rates with different constellations as well as the channelcapacity under such constraints, it is crucial to take these constraints intoconsideration properly. In this paper, we propose a direct approach to comparethe achievable rates of practical input constellations and the capacity undersuch constraints. As an example, we study the discrete-time complex-valuedadditive white Gaussian noise AWGN channel and compare the capacity under thepeak power constraint with the achievable rates of phase shift keying PSK andquadrature amplitude modulation QAM input constellations.



Autor: Shiro Ikeda, Kazunori Hayashi, Toshiyuki Tanaka

Fuente: https://arxiv.org/



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