Abstract

Bit-interleaved coded modulation (BICM) is a remarkable scheme by maximizing the code diversity to achieve better reliability over Rayleigh fading channels. However, it causes property degradation in AWGN channels because of the decreasing of the free (squared) Euclidean distance. Thus, the bit-interleaving coded modulation with iterative decoding (BICM-ID) is proposed, which can get unexceptionable BER performances both in AWGN channels and in Rayleigh fading channels. This paper examines the different parameters that affect the performances of BICM and BICM-ID through a plenty of simulations. Specifically, the following parameters are considered: the code rates, the modulation modes, the mapping schemes, the iteration numbers and the decoding algorithms.

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