This thesis looks at the problem of designing a coding strategy for interference channels with rate-limited transmitter cooperation. We first consider a simple communication model in which the classic two-user
Gaussian interference channel is augmented by rate-limited conferencing links between the transmitters. The main contribution is a partial zero-forcing precoding strategy based on a shared-private rate
splitting scheme at the transmitter, in which each transmitter communicates
part of its message to the other transmitter, and subsequently
partially pre-subtracts the interfering signal using a zero-forcing
precoder. We extend the proposed strategy to a class of multiuser interference channels, and outline a distributed algorithm to compute the precoder coefficients. The partial zero-forcing precoding strategy is shown to be particularly effective in certain high SNR/INR regimes, and simulation results for a multicell system highlight the cooperation gain due to the proposed strategy.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/25612 |
| Date | 01 January 2011 |
| Creators | Hari, Siddarth |
| Contributors | Yu, Wei |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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