2009/03/16 by Peter Fertl, Fertl, Peter, Joakim Jaldén +3
Computer Science · Engineering · #Advanced MIMO Systems Optimization #Advanced Wireless Communication Techniques #Error Correcting Code Techniques #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Communication Networks Research
paper · pdf · doi:10.48550/arxiv.0903.2711
openalex publication_date 2009/03/16 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
We provide a comprehensive performance comparison of soft-output and\nhard-output demodulators in the context of non-iterative multiple-input\nmultiple-output bit-interleaved coded modulation (MIMO-BICM). Coded bit error\nrate (BER), widely used in literature for demodulator comparison, has the\ndrawback of depending strongly on the error correcting code being used. This\nmotivates us to propose a code-independent performance measure in terms of\nsystem capacity, i.e., mutual information of the equivalent modulation channel\nthat comprises modulator, wireless channel, and demodulator. We present\nextensive numerical results for ergodic and quasi-static fading channels under\nperfect and imperfect channel state information. These results reveal that the\nperformance ranking of MIMO demodulators is rate-dependent. Furthermore, they\nprovide new insights regarding MIMO-BICM system design, i.e., the choice of\nantenna configuration, symbol constellation, and demodulator for a given target\nrate.\n