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arXiv cs/0602091cs.ITmath.IT
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平稳高斯信道的反馈容量

Feedback Capacity of Stationary Gaussian Channels

Young-Han Kim

摘要:

加性平稳高斯噪声信道的反馈容量的特点是作为一个变分问题的解决方案。为此,证明了最优反馈编码方案是平稳的。当专门用于一阶自回归移动平均噪声谱时,这种变分表征产生反馈能力的封闭形式的表达式。特别是,这个结果表明,著名的Schalkwijk-Kailath编码方案实现了一阶自回归移动平均高斯信道的反馈能力,积极回答了Butman,Schalkwijk-Tiernan,Wolfowitz,Ozarow,Ordentlich,Yang-Kavcic-Tatikonda等人研究的一个长期存在的公开问题。更一般地说,它示出的Schalkwijk-Kailath编码方案的k维推广实现了任何自回归移动平均噪声频谱的阶k的反馈能力。简单地说,最佳发送器迭代地细化接收器对预期消息的了解。

英文摘要:

The feedback capacity of additive stationary Gaussian noise channels is characterized as the solution to a variational problem. Toward this end, it is proved that the optimal feedback coding scheme is stationary. When specialized to the first-order autoregressive moving average noise spectrum, this variational characterization yields a closed-form expression for the feedback capacity. In particular, this result shows that the celebrated Schalkwijk-Kailath coding scheme achieves the feedback capacity for the first-order autoregressive moving average Gaussian channel, positively answering a long-standing open problem studied by Butman, Schalkwijk-Tiernan, Wolfowitz, Ozarow, Ordentlich, Yang-Kavcic-Tatikonda, and others. More generally, it is shown that a k-dimensional generalization of the Schalkwijk-Kailath coding scheme achieves the feedback capacity for any autoregressive moving average noise spectrum of order k. Simply put, the optimal transmitter iteratively refines the receiver's knowledge of the intended message.

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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