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Spatial Filter for MIMO Repeaters with First-Hop Channel State Information and End-to-End SNR
Ericsson Research, Isafjordsgatan 14E, 164 93 Kista, Sweden.
Ericsson Research, Isafjordsgatan 14E, 164 93 Kista, Sweden.
Ericsson Research, Isafjordsgatan 14E, 164 93 Kista, Sweden.
2009 (English)In: Vehicular Technology Conference Fall (VTC 2009-Fall), 2009 IEEE 70th, 2009Conference paper (Refereed)
Abstract [en]

—A repeater is a device that improves the ratecoverage performance of a system by amplifying and forwardingits received signal. When multiple antennas are deployed on arepeater, spatial signal processing becomes possible for betterperformance. In this paper we propose a spatial filter for sucha multi-antenna repeater. This filter is designed based on firsthop channel state information (CSI) and end-to-end signal-tonoise ratio (SNR). The optimal filter matrix is proved to be aproduct of a diagonal matrix and the conjugate transpose of theleft singular matrix of the first-hop channel matrix. The diagonalmatrix is obtained by maximizing an upper bound of the ergodicchannel capacity. Simulation results indicate that the proposedfilter outperforms that without filtering in end-to-end channelcapacity, especially when the number of repeater antennas isgreater than that of the source antennas. As the first-hop CSI andthe end-to-end SNR can be obtained without any modificationof the source or the destination, a repeater with the proposedspatial filter can be easily implemented in a current system.

Place, publisher, year, edition, pages
, IEEE VTS Vehicular Technology Conference Proceedings, ISSN 1090-3038
Keyword [en]
relaying, repeater, mimo
National Category
URN: urn:nbn:se:kth:diva-67303DOI: 10.1109/VETECF.2009.5378839ISI: 000280580400248OAI: diva2:484806
VTC Fall 2009
QC 20120208Available from: 2012-01-27 Created: 2012-01-27 Last updated: 2012-02-08Bibliographically approved

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ReferencesLink to record
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