Journal
IEEE TRANSACTIONS ON INFORMATION THEORY
Volume 57, Issue 6, Pages 3309-3322Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIT.2011.2142270
Keywords
Beamforming; capacity of wireless networks; degrees of freedom; interference alignment; interference channels; interference management; interference networks; iterative algorithms; nash equilibrium; relays
Funding
- National Science Foundation [CCF-0546860, CCF-0830809, CCF-0963925]
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Recent results establish the optimality of interference alignment to approach the Shannon capacity of interference networks at high SNR. However, the extent to which interference can be aligned over a finite number of signalling dimensions remains unknown. Another important concern for interference alignment schemes is the requirement of global channel knowledge. In this work, we provide examples of iterative algorithms that utilize the reciprocity of wireless networks to achieve interference alignment with only local channel knowledge at each node. These algorithms also provide numerical insights into the feasibility of interference alignment that are not yet available in theory.
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