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Entropy 2018, 20(11), 870; https://doi.org/10.3390/e20110870

Robust Signaling for Bursty Interference

1
Signal Theory and Communications Department, Universidad Carlos III de Madrid, 28911 Leganés, Spain
2
Gregorio Marañón Health Research Institute, 28007 Madrid, Spain
3
Electrical Engineering and Information Technology Department, Ruhr-Universität Bochum, 44780 Bochum, Germany
*
Author to whom correspondence should be addressed.
Received: 3 September 2018 / Revised: 25 October 2018 / Accepted: 6 November 2018 / Published: 12 November 2018
(This article belongs to the Special Issue Multiuser Information Theory II)
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Abstract

This paper studies a bursty interference channel, where the presence/absence of interference is modeled by a block-i.i.d. Bernoulli process that stays constant for a duration of T symbols (referred to as coherence block) and then changes independently to a new state. We consider both a quasi-static setup, where the interference state remains constant during the whole transmission of the codeword, and an ergodic setup, where a codeword spans several coherence blocks. For the quasi-static setup, we study the largest rate of a coding strategy that provides reliable communication at a basic rate and allows an increased (opportunistic) rate when there is no interference. For the ergodic setup, we study the largest achievable rate. We study how non-causal knowledge of the interference state, referred to as channel-state information (CSI), affects the achievable rates. We derive converse and achievability bounds for (i) local CSI at the receiver side only; (ii) local CSI at the transmitter and receiver side; and (iii) global CSI at all nodes. Our bounds allow us to identify when interference burstiness is beneficial and in which scenarios global CSI outperforms local CSI. The joint treatment of the quasi-static and ergodic setup further allows for a thorough comparison of these two setups. View Full-Text
Keywords: bursty interference channel; channel-state information; linear deterministic model; ergodic case; quasi-static case; sum capacity; opportunistic rates bursty interference channel; channel-state information; linear deterministic model; ergodic case; quasi-static case; sum capacity; opportunistic rates
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Villacrés, G.; Koch, T.; Sezgin, A.; Vazquez-Vilar, G. Robust Signaling for Bursty Interference. Entropy 2018, 20, 870.

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