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arXiv 1801.06702cs.ITmath.IT
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有色高斯噪声信道的反馈保密容量

Secrecy Capacity of Colored Gaussian Noise Channels with Feedback

Chong Li, Yingbin Liang, H. Vincent Poor, Shlomo Shamai

摘要:

本文研究了具有无噪声因果反馈的k阶自回归滑动平均(ARMA(k))高斯窃听信道,其中窃听者在前向信道和反馈信道中都接收到信号的噪声观测值。它示出的广义Schalkwijk-Kailath计划,一个容量实现编码方案的反馈高斯信道的一个变体,实现了相同的最大速率为同一信道的窃听者的存在。因此,保密容量等于反馈信道不存在窃听者时的反馈容量。此外,结果被推广到加性高斯白噪声(AWGN)信道与量化反馈。结果表明,所提出的编码方案实现了积极的保密率。当量化噪声的幅度降至零时,保密率收敛于AWGN信道的容量。

英文摘要:

In this paper, the k-th order autoregressive moving average (ARMA(k)) Gaussian wiretap channel with noiseless causal feedback is considered, in which an eavesdropper receives noisy observations of the signals in both forward and feedback channels. It is shown that a variant of the generalized Schalkwijk-Kailath scheme, a capacity-achieving coding scheme for the feedback Gaussian channel, achieves the same maximum rate for the same channel with the presence of an eavesdropper. Therefore, the secrecy capacity is equal to the feedback capacity without the presence of an eavesdropper for the feedback channel. Furthermore, the results are extended to the additive white Gaussian noise (AWGN) channel with quantized feedback. It is shown that the proposed coding scheme achieves a positive secrecy rate. As the amplitude of the quantization noise decreases to zero, the secrecy rate converges to the capacity of the AWGN channel.

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