摘要： 针对基于模代数预编码(THP)的多用户多输入多输出(MIMO)室内可见光通信系统存在误码率高、功率利用率低的问题,提出一种基于格基规约THP的多用户MIMO(MU-MIMO)通信系统。通过改进的格基规约THP对信道矩阵进行优化使其满秩,在此基础上,设计多用户接收信号均衡分配方案。仿真结果表明,在信噪比较高且信道不稳定的情况下,MU-MIMO通信系统具有较强的鲁棒性以及较低的误码率,多用户接收信号均衡分配方案有效解决了THP算法中用户接收信息的公平分配问题。

关键词: 可见光通信, 多输入多输出, 模代数预编码, 格基规约, 信噪比, 鲁棒性

Abstract: Aiming at the problem that the multi-user MIMO indoor Visible Light Communication(VLC) system based on Tomlinson Harashima Precoding(THP) has high Bit Error Rate(BER) and low power utilization,this paper proposes a Multi-user MIMO(MU-MIMO) communication system based on lattice reduction THP.It uses lattice reduction THP to optimize channel matrix and make it full rank.A multi-user received signal balanced distribution scheme is designed based on this system.Simulation results indicate that MU-MIMO communication system has high robustness and low BER even under the condition of high Signal to Noise Ratio(SNR) and unstable channel.The fair distribution problem of the information received by users effectively by the multi-user received signal balanced distribution scheme.

Key words: Visible Light Communication(VLC), Multiple Input Multiple Output(MIMO), Tomlinson Harashima Precoding(THP), lattice reduction, Signal to Noise Ratio(SNR), robustnes

中图分类号: 

• TP391