A Tight BER Upper Bound for Bit-Interleaved Coded Modulation with Square QAM and Gray Labeling |
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Authors: | Liang-Wei Huang Wern-Ho Sheen Tsang-Wei Yu |
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Affiliation: | Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu; |
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Abstract: | Bit-interleaved coded modulation (BICM) is a bandwidth-efficient coded system with diversity order higher than that of Ungerboeck's trellis-coded modulation on fading channels. In this paper, we investigate the BER (bit error rate) performance of BICM in the additive white Gaussian and Rayleigh fading channels. A new upper bound is given for the square QAM constellation with gray labeling, which constitutes a large portion of practical applications of BICM systems. The new upper bound is tighter than the well-known BICM union bound proposed in G. Caire et al. (1998) |
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