Capacity region of vector gaussian interference channels with generally strong interference

Xiaohu Shang, H. Vincent Poor

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

An interference channel is said to have strong interference if a certain pair of mutual information inequalities are satisfied for all input distributions. These inequalities assure that the capacity of the interference channel with strong interference is achieved by jointly decoding the signal and the interference. This definition of strong interference applies to discrete memoryless, scalar and vector Gaussian interference channels. However, there exist vector Gaussian interference channels that may not satisfy the strong interference condition but for which the capacity can still be achieved by jointly decoding the signal and the interference. This kind of interference is called generally strong interference. Sufficient conditions for a vector Gaussian interference channel to have generally strong interference are derived. The sum-rate capacity and the boundary points of the capacity region are also determined.

Original languageEnglish (US)
Article number6165363
Pages (from-to)3472-3496
Number of pages25
JournalIEEE Transactions on Information Theory
Volume58
Issue number6
DOIs
StatePublished - May 28 2012

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences

Keywords

  • Capacity
  • Gaussian
  • interference
  • multiple-input multiple-output (MIMO)

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