On channel output feedback in deterministic interference channels

Achaleshwar Sahai; Vaneet Aggarwal; Melda Yüksel; Ashutosh Sabharwal

doi:10.1109/ITW.2009.5351427

On channel output feedback in deterministic interference channels

Achaleshwar Sahai, Vaneet Aggarwal, Melda Yüksel, Ashutosh Sabharwal

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

21 Scopus citations

Abstract

In this paper, we study the effect of channel output feedback on the sum capacity in a two-user symmetric deterministic interference channel. We find that having a single feedback link from one of the receivers to its own transmitter results in the same sum capacity as having a total of 4 feedback links from both the receivers to both the transmitters. Hence, from the sum capacity point of view, the three additional feedback links are not helpful. We also consider a half-duplex feedback model, where the forward and the feedback resources are symmetric and timeshared. Surprisingly, we find that there is no gain in sum-capacity with feedback in a half-duplex feedback model, when interference links have more capacity than direct links.

Original language	English (US)
Title of host publication	2009 IEEE Information Theory Workshop, ITW 2009
Pages	298-302
Number of pages	5
DOIs	https://doi.org/10.1109/ITW.2009.5351427
State	Published - Dec 7 2009
Event	2009 IEEE Information Theory Workshop, ITW 2009 - Taormina, Sicily, Italy Duration: Oct 11 2009 → Oct 16 2009

Publication series

Name	2009 IEEE Information Theory Workshop, ITW 2009

Conference

Conference	2009 IEEE Information Theory Workshop, ITW 2009
Country/Territory	Italy
City	Taormina, Sicily
Period	10/11/09 → 10/16/09

ASJC Scopus subject areas

Computational Theory and Mathematics
Computer Networks and Communications
Information Systems
Electrical and Electronic Engineering

Access to Document

10.1109/ITW.2009.5351427

Cite this

Sahai, A, Aggarwal, V, Yüksel, M & Sabharwal, A 2009, On channel output feedback in deterministic interference channels. in 2009 IEEE Information Theory Workshop, ITW 2009., 5351427, 2009 IEEE Information Theory Workshop, ITW 2009, pp. 298-302, 2009 IEEE Information Theory Workshop, ITW 2009, Taormina, Sicily, Italy, 10/11/09. https://doi.org/10.1109/ITW.2009.5351427

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On channel output feedback in deterministic interference channels

Abstract

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