Performance Assessment of MIMO-BICM Demodulators based on System
Capacity
release_t7isxs6l7fhtpe6fbosr3xzt7m
by
Peter Fertl, Joakim Jalden, Gerald Matz
2010
Abstract
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
drawback of depending strongly on the error correcting code being used. This
motivates us to propose a code-independent performance measure in terms of
system capacity, i.e., mutual information of the equivalent modulation channel
that comprises modulator, wireless channel, and demodulator. We present
extensive numerical results for 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. Furthermore, they
provide new insights regarding MIMO-BICM system design, i.e., the choice of
antenna configuration, symbol constellation, and demodulator for a given target
rate.
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0903.2711v2
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