空间电子技术2026，Vol.23Issue(3)：9-18,10.DOI:10.3969/j.issn.1674-7135.2026.03.002
室内VLC-MIMO通信系统信道建模与光源布局优化设计
Channel modeling and light source layout optimization design for indoor VLC-MIMO communication systems
摘要
Abstract
To address the issues of edge optical power attenuation,multiple-input multiple-output(MIMO)channel orthogonality degradation,and the cliff effect associated with conventional single-source configurations in indoor visible light communication(VLC)systems,this paper proposes a channel modeling and light source layout optimization scheme for indoor VLC-MIMO communication systems.Based on the Lambertian radiation model,the channel direct current gain matrix is established,and a distributed 4×4 LED array topology is designed with the objectives of achieving uniform illumination and ensuring communication reliability.Furthermore,the performance of two receiver architectures,namely zero-forcing detection and equal gain combining(EGC)diversity,is comparatively investigated.Simulation and experimental results demonstrate that the proposed distributed LED array effectively improves indoor illumination distribution while satisfying lighting standard requirements.The channel matrix in the central region exhibits a low condition number and near-orthogonal characteristics,whereas increased channel correlation and a significantly larger condition number are observed in edge regions.Under such conditions,the EGC diversity architecture effectively mitigates the noise enhancement caused by channel correlation.In particular,in the edge coverage area,the proposed scheme not only satisfies the reliable communication requirement with a bit error rate(BER)below 10-3,but also maintains the BER below 10-4,thereby achieving superior communication performance.These results indicate that the proposed method is capable of effectively enhancing communication reliability and coverage performance,providing a valuable reference for optimizing light source layouts and evaluating performance in indoor VLC systems.关键词
可见光通信/多输入多输出系统/信道建模/光源布局优化/等增益合并Key words
visible light communication(VLC)/multiple-input multiple-output(MIMO)/channel modeling/light source layout optimization/equal gain combining(EGC)分类
航空航天引用本文复制引用
王春雨,任珈谊,Anna UROOJ,赵黎,区雯..室内VLC-MIMO通信系统信道建模与光源布局优化设计[J].空间电子技术,2026,23(3):9-18,10.基金项目
陕西省科技厅一般项目(编号:No.2024GX‒YBXM‒105) （编号:No.2024GX‒YBXM‒105）
西安工业大学大学生创新创业训练计划项目(编号:202510702051) （编号:202510702051）
