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Open AccessArticle

List-Decoding Capacity of the Gaussian Arbitrarily-Varying Channel

School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA
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This paper is an extended version of our paper published in the 2018 IEEE International Symposium on Information Theory (ISIT), Vail, CO, USA, 17–22 June 2018.
Entropy 2019, 21(6), 575; https://doi.org/10.3390/e21060575
Received: 11 April 2019 / Revised: 27 May 2019 / Accepted: 4 June 2019 / Published: 7 June 2019
(This article belongs to the Special Issue Information-Theoretic Security II)
In this paper, we determine the capacity of the Gaussian arbitrarily-varying channel with a (possibly stochastic) encoder and a deterministic list-decoder under the average probability of error criterion. We assume that both the legitimate and the adversarial signals are restricted by their power constraints. We also assume that there is no path between the adversary and the legitimate user but the adversary knows the legitimate user’s code. We show that for any list size L, the capacity is equivalent to the capacity of a point-to-point Gaussian channel with noise variance increased by the adversary power, if the adversary has less power than L times the transmitter power; otherwise, the capacity is zero. In the converse proof, we show that if the adversary has enough power, then the decoder can be confounded by the adversarial superposition of several codewords while satisfying its power constraint with positive probability. The achievability proof benefits from a novel variant of the Csiszár-Narayan method for the arbitrarily-varying channel. View Full-Text
Keywords: gaussian arbitrarily-varying channel; list-decoding; stochastic encoder; capacity gaussian arbitrarily-varying channel; list-decoding; stochastic encoder; capacity
MDPI and ACS Style

Hosseinigoki, F.; Kosut, O. List-Decoding Capacity of the Gaussian Arbitrarily-Varying Channel. Entropy 2019, 21, 575.

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