基于CNDM-OFDM的PLC与VLC级联通信系统  

PLC and VLC Cascade Communication System Based on CNDM-OFDM

作　　者：杨博瑞 赵黎[2] 芦颖 Yang Borui;Zhao Li;Lu Ying(Nanjing Huadun Power Information Security Evaluation Co.,Ltd.,Nanjing 210000,Jiangsu,China;College of Information Science and Engineering,Xi’an Technological University,Xi’an 710003,Shaanxi,China;China Electronics Technology Group Tai Chi Xi’an R&D Center,Xi’an 710000,Shaanxi,China)

机构地区：[1]南京华盾电力信息安全测评有限公司,江苏南京210000 [2]西安工业大学电子信息工程学院,陕西西安710003 [3]中电太极(集团)有限公司西安研发中心,陕西西安710000

出　　处：《激光与光电子学进展》2022年第23期88-97,共10页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61271362);陕西省科技厅一般项目-工业领域(2020GY-054);西安市科技计划(2020KJRC0040)。

摘　　要：为了解决可见光通信技术(VLC)中的信息孤岛问题,完善上行链路的通信需求,用电力线通信(PLC)对传统VLC进行有效补充,使其在提供电源的同时接入上行骨干网。为了保障信号在PLC与VLC级联系统两级信道中的有效传输,提出了一种基于正交频分复用(OFDM)的中心节点解调调制(CNDM)模型。针对PLC多径衰落和VLC的反射特点建立级联系统信道模型,并结合OFDM与级联系统的信号特点设计了同时适用于PLC与VLC中直流偏置光OFDM系统的传输方案。为了有效抑制级联信道干扰,设计了多段联合控制信号帧结构。实验结果表明:仿真条件下,级联系统在不同调制策略下均能满足通信需求,且信号质量很好,误码率可达10-4;实测条件下,级联系统能实现信号的有效传输,保障信号的可靠收发,整体最小误码率为0。To address the issue of information islands in the visible light communication technology(VLC)and improve the communication requirements of the uplink,power line communication(PLC)is used as an effective supplement for the traditional VLC and enables connection to the uplink backbone network while supplying power.To assure the efficient transmission of signals in the two-level channel of the PLC and VLC technology cascade system,central node demodulation and modulation(CNDM)model based on orthogonal frequency division multiplexing(OFDM)is proposed in this paper.According to the multipath fading of PLC and the reflection properties of VLC,the channel model of the cascaded system is developed.Combined with the signal characteristics of OFDM and the cascaded system,the transmission strategy of a direct current biased optical OFDM system appropriate for both PLC and VLC is devised.To suppress the cascaded channel interference effectively,a multisegment joint control signal frame structure is designed.The experimental results show that under the simulation conditions,the cascade system may satisfy the communication requirements using various modulation schemes with acceptable signal quality,and the low bit error rate can reach 10-4.Under the real-world measurement conditions,the cascade system can successfully transmit and receive signals reliably,with an overall minimal bit error rate of 0.

关 键 词：光通信 可见光通信 电力线通信 级联通信 正交频分复用 信道建模 

分 类 号：TN929.1[电子电信—通信与信息系统]