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Differentiated Rate Scheduling for MIMO Broadcast Channels with Estimation Errors

Vakili, Ali and Dana, Amir F. and Hassibi, Babak (2006) Differentiated Rate Scheduling for MIMO Broadcast Channels with Estimation Errors. In: Conference Record of the Asilomar Conference on Signals, Systems and Computers. IEEE , New York, NY, pp. 799-803. ISBN 978-1-4244-0784-2.

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We consider the throughput of a MIMO Gaussian broadcast channel with two generalizing assumptions: (1) differentiated quality of service, in the sense that the rates required by different users must satisfy certain rational constraints, and (2) imperfect channel side information (CSI), where we assume that the estimate of the underlying channel has some error with known distribution. Theoretically, with full and perfect CSI in hand, dirty paper coding (DPC) can achieve any point on the capacity region, including the non-symmetrical boundary points. However, the full CSI requirement and the computational complexity of DPC motivates the development of simpler schemes which require little feedback from the users and can obtain a large portion of the capacity of the channel. In this paper we will look at the throughput and rate ratio achieved by schemes based on the idea of opportunistic beam-forming and employing a rate back-off mechanism in order to maximize the throughput in the case of imperfect CSI. We will determine the optimal scheduling parameters and will show the order optimality of these schemes in the regime of large number of users.

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Additional Information:© 2006 IEEE. Issue Date: Oct. 29 2006-Nov. 1 2006. Date of Current Version: 07 May 2007. This work was supported by NSF grant CCR-0133818, by Caltech's Lee Center for Advanced Networking and by a grant from the David and Lucille Packard Foundation.
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Caltech Lee Center for Advanced NetworkingUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
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INSPEC Accession Number: 10288436
Record Number:CaltechAUTHORS:20110811-132404970
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Official Citation:Vakili, A.; Dana, A.F.; Hassibi, B.; , "Differentiated Rate Scheduling for MIMO Broadcast Channels with Estimation Errors," Signals, Systems and Computers, 2006. ACSSC '06. Fortieth Asilomar Conference on , vol., no., pp.799-803, Oct. 29 2006-Nov. 1 2006 doi: 10.1109/ACSSC.2006.354859 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24807
Deposited By: Ruth Sustaita
Deposited On:11 Aug 2011 22:02
Last Modified:09 Nov 2021 16:26

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