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Feedback Delay in Precoded Spatial Multiplexing MIMO Systems

Lookup NU author(s): Abdullatif Khrwat, Professor Bayan Sharif, Professor Harris Tsimenidis, Professor Said Boussakta, Dr Stephane Le Goff



Precoded spatial multiplexing multiple-input multiple-output (MIMO) systems using limited feedback have been extensively studied to reduce the feedback information based on the notion of delay-free feedback channel. In order to reduce performance degradation of precoded spatial multiplexing MIMO systems due to delay in the feedback channel, in this paper, we take into account the time varying nature of the channel, and consider the feedback delay problem. We propose the use of a linear predictor at the receiver to provide the precoder at the transmitter with predicted channel state information, and hence, mitigate the effect of feedback delay. The predictor is implemented using Kalman filter. The performance of this method is evaluated using computer simulation, and the achieved results demonstrate improved bit error rate performance in frequency selective Rayleigh fading channels.

Publication metadata

Author(s): Khrwat AS, Sharif BS, Tsimendis CC, Boussakta S, Le Goff SY

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: IEEE 19th International Symposium on Personnel Indoor and Mobile Radio Communications, PIMRC

Year of Conference: 2008

Pages: 1-4

Date deposited: 15/03/2010

Publisher: IEEE


DOI: 10.1109/PIMRC.2008.4699644

Library holdings: Search Newcastle University Library for this item

ISBN: 9781424426430