On the Throughput of Wireless Interference Networks with Limited Feedback
2011 (English)In: 2011 IEEE International Symposium on Information Theory Proceedings (ISIT), IEEE , 2011, 762-766 p.Conference paper (Refereed)
Considering a single-antenna M-user interferencechannel with symmetrically distributed channel gains, when thechannel state information (CSI) is globally available, applyingthe ergodic interference alignment scheme, each transmitterreceiverpair achieves a rate proportional to 1⁄2 of a single user’sinterference-free achievable rate. This is substantially higher thanthe achievable rate of the conventional orthogonal transmissionschemes such as TDMA. Since the rigid requirement on theCSI may be difficult to realize in practice, in this paper weinvestigate the performance of applying the ergodic interferencealignment scheme when the estimation of each channel gain ismade globally known through exploiting only a limited feedbacksignal from the associated receiver of that channel. Under a blockfading environment, we provide a lower bound on the achievableaverage throughput of the network. Our results imply that thebetter performance of interference alignment over TDMA maystill exist even without the assumption of perfect CSI. Also, thetrade off between allocating feedback rate of each receiver tothe desired channel or the interference channels at deferent SNRregion investigated.
Place, publisher, year, edition, pages
IEEE , 2011. 762-766 p.
Interference networks, limited feedback, interference alignment
Telecommunications Communication Systems
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-44527DOI: 10.1109/ISIT.2011.6034237ISI: 000297465100153ScopusID: 2-s2.0-80054825709ISBN: 978-1-4577-0596-0 (Print)ISBN: 978-1-4577-0594-6 (Electronic)OAI: oai:DiVA.org:kth-44527DiVA: diva2:450947
2011 IEEE International Symposium on Information Theory
FunderICT - The Next Generation
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