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Exploiting the spatial information provided by channel statistics and SNR feedback
KTH, School of Electrical Engineering (EES), Signal Processing.
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0003-2298-6774
2006 (English)In: 2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, NEW YORK: IEEE , 2006, 164-168 p.Conference paper (Refereed)
Abstract [en]

A major limiting factor in communication systems utilizing multiantenna transmission is the amount of spatial channel information available at the transmitter. Since the channel realizations, in most cases, can only be estimated at the receiver, such information must be fed back to the transmitter. In multiuser systems the amount of feedback must be kept minimal, which seriously limits the information that can be fed back. Herein it is shown that the feedback of a scalar signal to noise ratio (SNR), together with knowledge of the statistical properties of the channel, provides substantial spatial information about the current channel realization. The spatial information is particularly good for strong channel realizations, i.e. for users that are candidates for scheduling. Previous results are extended to the Ricean channel model and the impact of the non-zero expected value is shown to further improve the spatial information.

Place, publisher, year, edition, pages
NEW YORK: IEEE , 2006. 164-168 p.
Keyword [en]
Ricean channel model, SNR feedback, channel statistics, multi-antenna transmission, multiuser systems, receiver, scalar signal to noise ratio, spatial channel information, spatial information, statistical properties, transmitter
National Category
Telecommunications Signal Processing
URN: urn:nbn:se:kth:diva-34948DOI: 10.1109/SPAWC.2006.346387ISI: 000246147200034ScopusID: 2-s2.0-48749105808ISBN: 978-0-7803-9710-1OAI: diva2:427437
7th IEEE Workshop on Signal Processing Advances in Wireless Communications Cannes, FRANCE, JUL 02-05, 2006
QC 20110628Available from: 2011-06-28 Created: 2011-06-17 Last updated: 2012-01-23Bibliographically approved

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