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arXiv 2303.02500cs.ITmath.IT
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超越 I-MMSE 关系:高斯信道中互信息的导数

Beyond the I-MMSE relation: derivatives of mutual information in Gaussian channels

Minh-Toan Nguyen

AI总结:

本文针对矢量高斯信道推导了互信息关于信噪比各阶导数的一般公式,揭示了其与统计理论中经典累积量-矩关系的显著相似性。

摘要:

I-MMSE 公式连接了信息论和估计论中的两个重要量:互信息和最小均方误差(MMSE)。它指出,在标量高斯信道中,互信息关于信噪比(SNR)的导数是 MMSE 的一半。尽管理论上可以计算固定阶数的任意导数,但所有导数的一般公式仍然未知。在本文中,我们推导了矢量高斯信道的这一一般公式。所得结果与统计理论中经典的累积量-矩关系极为相似。

英文摘要:

The I-MMSE formula connects two important quantities in information theory and estimation theory: the mutual information and the minimum mean-squared error (MMSE). It states that in a scalar Gaussian channel, the derivative of the mutual information with respect to the signal-to-noise ratio (SNR) is one-half of the MMSE. Although any derivative at a fixed order can be computed in principle, a general formula for all the derivatives is still unknown. In this paper, we derive this general formula for vector Gaussian channels. The obtained result is remarkably similar to the classic cumulant-moment relation in statistical theory.

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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