论文标题
Protograph LDPC编码的MIMO-VLC系统具有广义空间调制的设计
Design of Protograph LDPC-Coded MIMO-VLC Systems with Generalized Spatial Modulation
论文作者
论文摘要
本文研究了用于多输入多输出（MIMO）可见光光通信（VLC）的迭代解码（BICGSM-ID），研究了位的编码广义空间调制（BICGSM）。在BICGSM-ID方案中，信号域（SID）符号和空间域（SPD）发射二极管（LED） - 索引模式的信息位是由Protograph低密度平价 - 签克（P-LDPC）代码编码的。具体而言，我们提出了一个信号域符号扩展和重新分配（SSER）方法，用于构建一种新型的广义空间调制（GSM）星座，称为SSERGSM星座，以提高BICGSM-ID MIMO-IMO-MIMO-VLC Systems的性能。此外，通过应用修改后的PEXIT（MPEXIT）算法，我们进一步设计了一个与速率兼容的P-LDPC代码系列（称为增强的累积重复益度（EARA）代码，该代码具有出色的解码阈值和线性最小距离级别的高度质量。分析和仿真结果都表明，所提出的SSERGSM星座和P-LDPC代码可以显着改善MIMO-VLC系统的收敛性和解码性能。因此，提出的P-LDPC编码的SSERGSM映射的BICGSM-ID配置被设想为有前途的传输解决方案，以满足MIMO-VLC应用程序的高通量要求。
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.
