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Entropy 2017, 19(9), 441; https://doi.org/10.3390/e19090441

Interfering Relay Channels

1
Ericsson Research, Ericsson, 164 40 Stockholm, Sweden
2
School of Electrical Engineering, KTH Royal Institute of Technology, 114 28 Stockholm, Sweden
3
Department of Electrical & Computer Engineering, Tufts University, Medford, MA 02155, USA
*
Author to whom correspondence should be addressed.
Received: 8 July 2017 / Revised: 9 August 2017 / Accepted: 21 August 2017 / Published: 23 August 2017
(This article belongs to the Special Issue Network Information Theory)
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Abstract

This paper introduces and studies a model in which two relay channels interfere with each other. Motivated by practical scenarios in heterogeneous wireless access networks, each relay is assumed to be connected to its intended receiver through a digital link with finite capacity. Inner and outer bounds for achievable rates are derived and shown to be tight for new discrete memoryless classes, which generalize and unify several known cases involving interference and relay channels. Capacity region and sum capacity for multiple Gaussian scenarios are also characterized to within a constant gap. The results show the optimality or near-optimality of the quantize-bin-and-forward coding scheme for practically relevant relay-interference networks, which brings important engineering insight into the design of wireless communications systems. View Full-Text
Keywords: interference channel; relay channel; interference channel with two relays; interference relay channel; deterministic relay channel; quantize-forward; quantize-bin-and-forward; hash-forward; interference management interference channel; relay channel; interference channel with two relays; interference relay channel; deterministic relay channel; quantize-forward; quantize-bin-and-forward; hash-forward; interference management
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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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Do, H.T.; Oechtering, T.J.; Skoglund, M.; Vu, M. Interfering Relay Channels. Entropy 2017, 19, 441.

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