Performance Assessment of MIMO-BICM Demodulators Based on Mutual Information
2012 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 60, no 3, 1366-1382 p.Article in journal (Refereed) Published
We provide a comprehensive performance comparison of soft-output and hard-output demodulators in the context of non-iterative multiple-input multiple-output bit-interleaved coded modulation (MIMO-BICM). Coded bit error rate (BER), widely used in literature for demodulator comparison, has the draw-back of depending strongly on the error correcting code being used. This motivates us to propose the mutual information of the equivalent modulation channel (comprising modulator, wireless channel, and demodulator) as a code-independent performance measure. We present extensive numerical results for spatially independent identically distributed (i.i.d.) ergodic and quasi-static fading channels under perfect and imperfect channel state information. These results reveal that the performance ranking of MIMO demodulators is rate-dependent and provide new insights regarding MIMO-BICM system design, i.e., the choice of antenna configuration, symbol constellation, and demodulator for a given target rate.
Place, publisher, year, edition, pages
2012. Vol. 60, no 3, 1366-1382 p.
Bit-interleaved coded modulation (BICM), log-likelihood ratio, multiple-input-multiple-output (MIMO), mutual information, performance limits, soft demodulation
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-91244DOI: 10.1109/TSP.2011.2177823ISI: 000300424500031ScopusID: 2-s2.0-84857211835OAI: oai:DiVA.org:kth-91244DiVA: diva2:509300
FunderICT - The Next Generation
QC 201203122012-03-122012-03-122013-04-11Bibliographically approved