An Improved Feedback Coding Scheme for the Wire-Tap Channel

et al. 2020

J Wireless Com Network

Self Cite

Physical layer security (PLS), which is based on information-theoretic principles of message confidentiality, has attracted considerable attention in recent years. This paper provides a comprehensive survey of using channel feedback (CF) to enhance the quality of PLS of various communication models. To be specific, the survey starts from the secret key-based CF scheme and its variations for the wiretap channel (WTC) and other communication models. Then, for the WTC and its generalized models, an improved feedback scheme and its variations are respectively introduced, where the improved scheme combines the secret key-based CF scheme with the Wyner-Ziv scheme for source coding with side information. It has been shown that these improved schemes perform better than the original secret key-based schemes for several cases. Next, the Schalkwijk-Kailath (SK) feedback scheme and its variations are introduced, which are optimal for the Gaussian WTC and its variations. Finally, the already existing CF schemes are summarized and the future challenges of using CF to enhance PLS are discussed.

Section: New Results On the General Wtc With Noiseless Feedbackmentioning

confidence: 99%

Section: Applications Of the Improved Secret Key-based Feedback Schemmentioning

confidence: 99%

Section: Applications Of the Improved Secret Key-based Feedback Schemmentioning

confidence: 99%

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Enhancing physical layer security via channel feedback: a survey

Dai

Li²,

et al. 2020

J Wireless Com Network

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“…Furthermore, [9] presented an achievable scheme for the wiretap channel with generalized feedback, which is a generalization and unification of several relevant previous results in the literature. Very recently, [10] proposed an improved feedback coding scheme for the wiretap channel with noiseless feedback, which was shown to outperform the existing ones in the literature. A more comprehensive review of the previous work can be found in the extended version of this paper [11].…”

Section: Introductionmentioning

confidence: 99%

A Coding Scheme for Colored Gaussian Wiretap Channels with Feedback

Liu

2018 IEEE International Symposium on Information Theory (ISIT)

Poor

et al. 2018

In this paper, the finite-order autoregressive moving average (ARMA) 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 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.

“…Furthermore, [27] presented an achievable scheme for the wiretap channel with generalized feedback, which is a generalization and unification of several relevant previous results in the literature. Very recently, [28] proposed an improved feedback coding scheme for the wiretap channel with noiseless feedback, which was shown to outperform the existing ones in the literature.…”

mentioning

confidence: 99%

Secrecy Capacity of Colored Gaussian Noise Channels With Feedback

Liu¹,

IEEE Trans. Inform. Theory

Poor

et al. 2019

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. Index TermsSecrecy Capacity, Feedback, Colored Gaussian, Schalkwijk-Kailath Scheme I. INTRODUCTIONIt has been more than a half century since the information theorists started to investigate the capacity of feedback Gaussian channels. As the pioneering studies on this topic, Shannon's 1956 paper [2] showed that feedback does not increase the capacity of the memoryless AWGN channel, and Elias [3] [4] proposed some simple corresponding feedback coding schemes. Schalkwijk and Kailath [5] [6] then developed a notable linear feedback coding scheme to achieve the capacity of the feedback AWGN channel. Thereafter, the problem of finding the feedback capacity and the capacity-achieving codes for the memory Gaussian channels (e.g. ARMA(k)) has been extensively studied. Butman [7] [8], Wolfowitz [9] and Ozarow [10] [11] extended Schalkwijk's scheme to ARMA(k) Gaussian channels, leading Chong Li is with Qualcomm Research, Bridgewater, NJ, 08807, USA (chongl@qti.qualcomm.com). Yingbin Liang is with the