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Understanding the BER-performance of space-time block codes

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3 Author(s)
Gritsch, G. ; Inst. of Commun. & Radio Frequency Eng., Vienna Univ. of Technol., Austria ; Weinrichter, H. ; Rupp, M.

We show that, in the case of general space-time block codes (STBC), not only the pairwise error probabilities (PEPs) between nearest neighboring code words have to be considered to evaluate the total bit error ratio (BER) performance of the STBC. It turns out that code word pairs differing in a rather large large number of positions typically lead to rank deficient distance matrices (DMs), causing a severe diversity loss and thus deterioration in the total BER performance in Rayleigh fading wireless multiple input-multiple output (MIMO) channels, especially at high signal-to-noise ratio (SNR) levels. In the special case of orthogonal codes from the generalized complex orthogonal design (GCOD), nearest neighbor code word errors dominate the BER-curve and no diversity loss occurs at high SNR.

Published in:

Signal Processing Advances in Wireless Communications, 2003. SPAWC 2003. 4th IEEE Workshop on

Date of Conference:

15-18 June 2003

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