Effect of Spatio-Temporal Channel Correlation on the Performance of Space-Time Codes

The determinant and rank criteria used for space-time code design apply at high SNR. Code design metrics developed for low SNR assume a channel autocorrelation matrix with equal eigenvalues, which does not hold in many practical scenarios. This paper shows that a space-time code designed to ensure full diversity at high SNR can suffer significant degradation when implemented at low-to-medium SNR because of the channel autocorrelation profile. We examine the effect of the channel autocorrelation matrix on a space-time code's performance and discuss how knowledge of this matrix can be used for code design, particularly from the aspect of space-time trellis code minimum memory requirements. Our discussion applies to both flat-fading and frequency-selective channels that are treated in a unified manner.

Published in:
ICC 2002, 1, 6-10
Presented at:
IEEE International Conference on Communications (ICC 2002), New York, USA, April 28-May 2, 2002

 Record created 2007-02-01, last modified 2018-03-17

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