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A Novel BICM-ID System Approaching Shannon-Limit at High Spectrum Efficiency
Zhixing YANG Qiuliang XIE Kewu PENG Zhaocheng WANG
IEICE TRANSACTIONS on Communications
Publication Date: 2011/03/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
APSK, shaping, EXIT chart, BICM-ID,
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A method to construct bit-interleaved coded modulation with iterative demapping and decoding (BICM-ID) is developed that approaches the Shannon limit very closely at high spectrum efficiency, where amplitude-phase shift keying (APSK) constellations are designed and chosen. For 1/2-rate 64APSK, the Es/N0 threshold derived through extrinsic information transfer (EXIT) charts is less than 0.55 dB away from the Shannon limit of the continuous-input additive white Gaussian noise (AWGN) channel, and exceeds the theoretical limit constrained by standard 64QAM-input.