Design of Protograph LDPC-Coded MIMO-VLC Systems with Generalized Spatial Modulation

Lin Dai; Yi Fang; Yong Liang Guan; Mohsen Guizani

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arXiv · 2210.16007

Design of Protograph LDPC-Coded MIMO-VLC Systems with Generalized Spatial Modulation

Lin Dai·Yi Fang·Yong Liang Guan·Mohsen Guizani

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Abstract

This paper investigates the bit-interleaved coded generalized spatial modulation (BICGSM) with iterative decoding (BICGSM-ID) for multiple-input multiple-output (MIMO) visible light communications (VLC). In the BICGSM-ID scheme, the information bits conveyed by the signal-domain (SiD) symbols and the spatial-domain (SpD) light emitting diode (LED)-index patterns are coded by a protograph low-density parity-check (P-LDPC) code. Specifically, we propose a signal-domain symbol expanding and re-allocating (SSER) method for constructing a type of novel generalized spatial modulation (GSM) constellations, referred to as SSERGSM constellations, so as to boost the performance of the BICGSM-ID MIMO-VLC systems. Moreover, by applying a modified PEXIT (MPEXIT) algorithm, we further design a family of rate-compatible P-LDPC codes, referred to as enhanced accumulate-repeat-accumulate (EARA) codes, which possess both excellent decoding thresholds and linear-minimum-distance-growth property. Both analysis and simulation results illustrate that the proposed SSERGSM constellations and P-LDPC codes can remarkably improve the convergence and decoding performance of MIMO-VLC systems. Therefore, the proposed P-LDPC-coded SSERGSM-mapped BICGSM-ID configuration is envisioned as a promising transmission solution to satisfy the high-throughput requirement of MIMO-VLC applications.

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BibTeX RIS

Lin Dai, Yi Fang, Yong Liang Guan, Mohsen Guizani. 2022-10-28. Design of Protograph LDPC-Coded MIMO-VLC Systems with Generalized Spatial Modulation. https://arxiv.org/abs/2210.16007

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