Journal
IEEE TRANSACTIONS ON INFORMATION THEORY
Volume 56, Issue 9, Pages 4566-4592Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIT.2010.2054590
Keywords
Capacity; interference alignment; interference channel; lattice codes; multiuser channels
Funding
- Vodafone-U.S. Foundation
- National Science Foundation (NSF)
- Direct For Computer & Info Scie & Enginr [830796] Funding Source: National Science Foundation
- Division of Computing and Communication Foundations [830796] Funding Source: National Science Foundation
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Recently, Etkin, Tse, and Wang found the capacity region of the two-user Gaussian interference channel to within 1 bit/s/Hz. A natural goal is to apply this approach to the Gaussian interference channel with an arbitrary number of users. We make progress towards this goal by finding the capacity region of the many-to-one and one-to-many Gaussian interference channels to within a constant number of bits. The result makes use of a deterministic model to provide insight into the Gaussian channel. The deterministic model makes explicit the dimension of signal level. A central theme emerges: the use of lattice codes for alignment of interfering signals on the signal level.
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