Exploiting long-term statistics in spatially correlated multi-user MIMO systems with quantized channel norm feedback
2008 (English)In: 2008 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, IEEE , 2008, 3117-3120 p.Conference paper (Refereed)
In wireless multiple antenna and multi-user systems, the spatial dimensions may be exploited to increase the performance by means of antenna gain, spatial diversity, and multi-user diversity. A limiting factor in such systems is the channel information required by the transmitter to control the intra-cell interference. Herein, the properties of spatially correlated channels with long-term statistical information at the transmitter and fixed-rate feedback of the quantized Euclidean channel norm are analyzed using a spectral subspace decomposition framework. A spatial division multiple access scheme is proposed with interference suppression at the receiver and joint scheduling and zero-forcing beamforming at the transmitter. Closed-form expressions for first and second order moments of the feedback conditional channel statistics are derived. It is shown that only a few bits of feedback are required to achieve reliable rate estimation and weighted sum-rate maximization.
Place, publisher, year, edition, pages
IEEE , 2008. 3117-3120 p.
, IEEE International Conference on Acoustics, Speech and Signal Processing, ISSN 1520-6149
array signal processing, feedback, MIMO systems, mobile communication, spatial division multiple access
Telecommunications Signal Processing
IdentifiersURN: urn:nbn:se:kth:diva-34919DOI: 10.1109/ICASSP.2008.4518310ISI: 000257456702102ScopusID: 2-s2.0-51449108899ISBN: 978-1-4244-1483-3OAI: oai:DiVA.org:kth-34919DiVA: diva2:428767
33rd IEEE International Conference on Acoustics, Speech and Signal Processing Las Vegas, NV, MAR 30-APR 04, 2008
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QC 201107012011-10-262011-06-172012-01-23Bibliographically approved