Ergodic two-user interference channels: Is separability optimal?

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

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish (US)
Title of host publication46th Annual Allerton Conference on Communication, Control, and Computing
Pages723-729
Number of pages7
DOIs
StatePublished - Dec 1 2008
Event46th Annual Allerton Conference on Communication, Control, and Computing - Monticello, IL, United States
Duration: Sep 24 2008Sep 26 2008

Publication series

Name46th Annual Allerton Conference on Communication, Control, and Computing

Other

Other46th Annual Allerton Conference on Communication, Control, and Computing
CountryUnited States
CityMonticello, IL
Period9/24/089/26/08

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Software
  • Control and Systems Engineering
  • Communication

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  • Cite this

    Sankar, L., Shang, X., Erkip, E., & Poor, H. V. (2008). Ergodic two-user interference channels: Is separability optimal? In 46th Annual Allerton Conference on Communication, Control, and Computing (pp. 723-729). [4797629] (46th Annual Allerton Conference on Communication, Control, and Computing). https://doi.org/10.1109/ALLERTON.2008.4797629