arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1908.09622cs.ITmath.IT
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互信息近似

Mutual Information Approximation

Chongjun Ouyang, Sheng Wu, Hongwen Yang

摘要:

为了提供一种有效的方法来表征加性高斯白噪声(AWGN)信道下的输入输出互信息(MI),本文采用多指数衰减曲线拟合(M-EDCF)方法拟合了多电平正交幅度调制(M-QAM)信号输入下的精确MI曲线。尽管瞬时MI与信噪比(SNR)的关系定义式复杂,包含积分不易计算,但新的拟合公式形式简洁,精度高,计算复杂度低。一般来说,该MI近似公式可以促进离散输入下实际通信系统性能分析的研究。

英文摘要:

To provide an efficient approach to characterize the input-output mutual information (MI) under additive white Gaussian noise (AWGN) channel, this short report fits the curves of exact MI under multilevel quadrature amplitude modulation (M-QAM) signal inputs via multi-exponential decay curve fitting (M-EDCF). Even though the definition expression for instanious MI versus Signal to Noise Ratio (SNR) is complex and the containing integral is intractable, our new developed fitting formula holds a neat and compact form, which possesses high precision as well as low complexity. Generally speaking, this approximation formula of MI can promote the research of performance analysis in practical communication system under discrete inputs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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