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Capacity of iterative detection and decoding of space-time bit-interleaved coded-modulation BPSK codes

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2 Author(s)
S. Hirst ; Dept. of Electron., York Univ., UK ; A. G. Burr

We consider MlMO schemes with Nt transmit and Nr receive antennas using BPSK modulation in quasi-static fading. We show that space-time (ST) bit-interleaving coded-modulation (BICM) approaches mapping binary codes to BPSK ST codes show a loss over coded-modulation (CM) MIMO capacity. This is despite the use of an optimal inner detector and is illustrated using capacity CDFs for the CM and ST-BICM cases. The CDFs are translated to plots of outage probabilities as functions of SNR. For capacity-achieving schemes, these indicate that SNR losses of ST-BICM over CM approaches decrease with Nr and increase with Nt. Finally, we amend our method for where the outer binary code is only capacity-approaching - we find this provides accurate predictions of FERs for ST-BICM using an outer turbo code.

Published in:

Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on  (Volume:4 )

Date of Conference:

5-8 Sept. 2004