Approximation Formulas for the Symmetric Capacity of M-ary Modulations

Weidong Li; Hongwen Yang; Dacheng Yang

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Approximation Formulas for the Symmetric Capacity of M-ary Modulations

Weidong Li * #,Hongwen Yang,Dacheng Yang

Beijing University of Posts&Telecomunications

*Correspondence author

#Submitted by

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Funding: none

Opened online:12 April 2007

Accepted by: none

Citation: Weidong Li,Hongwen Yang,Dacheng Yang.Approximation Formulas for the Symmetric Capacity of M-ary Modulations[OL]. [12 April 2007] http://en.paper.edu.cn/en_releasepaper/content/12152

Channel capacity has important role in the analysis and design of the communication systems. Unfortunately, for the commonly used one- or two-dimensional modulation constellations, there is no closed form formula to calculate such capacity. In this paper, some simple approximation formulas are presented for evaluating the symmetric capacity of the commonly used constellations under additive white Gaussian noise channel with perfect channel state information at receiver.

Keywords:Approximation Formulas, Symmetric Capacity

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