Ergodic two-user interference channels: Is separability optimal?

Lalitha Sankar; Xiaohu Shang; Elza Erkip; H. Vincent Poor

doi:10.1109/ALLERTON.2008.4797629

Ergodic two-user interference channels: Is separability optimal?

Lalitha Sankar, Xiaohu Shang, Elza Erkip, H. Vincent Poor

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

17 Scopus citations

Abstract

The optimality of separable encoding and decoding over parallel channels (fading states) for ergodic fading two-user interference channels (IFCs) is studied using a one-sided IFC as a model. For an ergodic fading one-sided IFC with non-fading direct links and a fading cross-channel link, it is shown that separability can be strictly suboptimal except for the cases where all the parallel channels are of the same type, i.e., all of them are either strong but not very strong or very strong channels. A recent result on the sum-capacities of classes of ergodic strong and very strong IFCs is used to show that encoding and decoding jointly over all parallel channels is optimal when either the strong or very strong interference conditions hold on average over all channels.

Original language	English (US)
Title of host publication	46th Annual Allerton Conference on Communication, Control, and Computing
Pages	723-729
Number of pages	7
DOIs	https://doi.org/10.1109/ALLERTON.2008.4797629
State	Published - 2008
Externally published	Yes
Event	46th Annual Allerton Conference on Communication, Control, and Computing - Monticello, IL, United States Duration: Sep 24 2008 → Sep 26 2008

Publication series

Name	46th Annual Allerton Conference on Communication, Control, and Computing

Other

Other	46th Annual Allerton Conference on Communication, Control, and Computing
Country/Territory	United States
City	Monticello, IL
Period	9/24/08 → 9/26/08

ASJC Scopus subject areas

Computer Networks and Communications
Software
Control and Systems Engineering
Communication

Access to Document

10.1109/ALLERTON.2008.4797629

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Ergodic two-user interference channels: Is separability optimal? / Sankar, Lalitha; Shang, Xiaohu; Erkip, Elza et al.
46th Annual Allerton Conference on Communication, Control, and Computing. 2008. p. 723-729 4797629 (46th Annual Allerton Conference on Communication, Control, and Computing).

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

Sankar, L, Shang, X, Erkip, E & Poor, HV 2008, Ergodic two-user interference channels: Is separability optimal? in 46th Annual Allerton Conference on Communication, Control, and Computing., 4797629, 46th Annual Allerton Conference on Communication, Control, and Computing, pp. 723-729, 46th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, United States, 9/24/08. https://doi.org/10.1109/ALLERTON.2008.4797629

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AB - The optimality of separable encoding and decoding over parallel channels (fading states) for ergodic fading two-user interference channels (IFCs) is studied using a one-sided IFC as a model. For an ergodic fading one-sided IFC with non-fading direct links and a fading cross-channel link, it is shown that separability can be strictly suboptimal except for the cases where all the parallel channels are of the same type, i.e., all of them are either strong but not very strong or very strong channels. A recent result on the sum-capacities of classes of ergodic strong and very strong IFCs is used to show that encoding and decoding jointly over all parallel channels is optimal when either the strong or very strong interference conditions hold on average over all channels.

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Ergodic two-user interference channels: Is separability optimal?

Abstract

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