基于预编码与压扩技术VLC系统研究  

Research on VLC system based on precoding and companding techniques

作　　者：范嘉欣 潘儒 邹林儿 沈云[1] FAN Jia-xin;PAN Ru;ZOU Lin-er;SHEN Yun(School of Physics and Materials Science,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学物理与材料学院,江西南昌330031

出　　处：《激光与红外》2024年第8期1322-1328,共7页Laser & Infrared

基　　金：国家自然科学基金项目(No.62165008);江西省自然科学基金项目(No.20212ACB201007)资助。

摘　　要：针对非对称削波光正交频分复用系统应用在可见光通信中峰值平均功率比过高的问题,在研究编码技术和失真技术的基础上,提出了一种Hadamard编码与归一化μ律压扩联合方案来降低峰值平均功率比。联合方案仿真结果表明,与Hadamard编码技术相比,在峰值平均功率比抑制性能方面提升了5.8 dB;另一方面,与归一化μ律压扩技术相比,在误码率上仍然取得了更好的性能,优化了2 dB。Aiming at the problem of high peak-to-average power ratio of asymmetrically clipped optical orthogonal frequency division multiplexing system applied in visible light communication,a joint scheme combining Hadamard precoding with normalizedμ-law companding is proposed to reduce peak-to-average power ratio on the basis of the study of coding technology and distortion technology.The simulation results of the joint scheme demonstrate an improvement of 5.8 dB in peak-to-average power ratio suppression performance compared to Hadamard precoding alone.Additionally,compared to normalizedμ-law companding,it still exhibits superior performance in terms of error rate,achieving a 2 dB optimization.

关 键 词：可见光通信 归一化μ律压扩 预编码 峰值平均功率比 

分 类 号：TN929.12[电子电信—通信与信息系统] TN911.72[电子电信—信息与通信工程]