天津科技大学学报2026，Vol.41Issue(4)：63-70,8.DOI:10.13364/j.issn.1672-6510.20260049
相关噪声信道下室内可见光通信预编码优化
Optimization of Precoding for Indoor Visible Light Communication in Dependent Noise Channels
摘要
Abstract
With the widespread application of radio-frequency communication technology in indoor user scenarios,achieving efficient,high-speed,and large-scale information transmission has become an important research topic.Visible light communication(VLC)multi-input multi-output(MIMO)systems offer an effective solution due to their abundant spec-trum resources and absence of electromagnetic radiation.However,due to the presence of signal-dependent noise(SDN),traditional precoding methods struggle to effectively suppress inter-user interference and enhance system capacity.To address this issue,this article proposes a stepwise joint optimization scheme to enhance the throughput of communication systems in indoor VLC scenarios with SDN.First,the concave-convex procedure(CCP)is employed to convexify and solve the precod-ing matrix;second,a high signal-to-noise ratio approximation(HSNRA)is introduced to equivalently transform the objective function;finally,power allocation optimization is achieved based on the successive convex approximation(SCA)method.Experimental results demonstrate that compared to precoding using the CCP method alone or linear precoding using the HSNRA method alone,the proposed scheme can increase system capacity by approximately 10%-40%under signal-to-noise ratio(SNR)conditions ranging from 15 to 40 dB.Therefore,the method proposed in this article provides a new technical approach for improving indoor VLC communication throughput at low cost,contributing to the further advancement of VLC deployment indoors.关键词
可见光通信/信号相关噪声/预编码/功率分配/最大化系统容量Key words
visible light communication/signal-dependent noise/precoding/power allocation/system capacity maxi-mization分类
信息技术与安全科学引用本文复制引用
张琦佳,佘梅绮,孙先范,杨雪,魏宜大,冯人海..相关噪声信道下室内可见光通信预编码优化[J].天津科技大学学报,2026,41(4):63-70,8.基金项目
新疆维吾尔自治区自然科学基金项目(2025D01A59) （2025D01A59）
