Image transmission in an OFDM VLC system using symbol scrambling and chaotic Walsh-Hadamard precoding  

作　　者：WANG Zhong-peng YE Zhuo-ying WANG Xiu-min ZHAI Zhi-nian 王中鹏;叶卓映;王秀敏;翟志年(School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China;Xiamen City University, Xiamen 361008, China;College of Information Engineering, China Jiliang University, Hangzhou 310038, China)

机构地区：[1]School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China [2]Xiamen City University, Xiamen 361008, China [3]College of Information Engineering, China Jiliang University, Hangzhou 310038, China

出　　处：《Optoelectronics Letters》2019年第4期284-287,共4页光电子快报（英文版）

基　　金：supported in part by the Zhejiang Provincial Natural Science Foundation of China(No.LY17F050005);the National Natural Science Foundation of China(Nos.61379027 and 51874264)

摘　　要：An image secure transmission scheme combining symbol scrambling and chaotic Wahsh-Hardmard precoding is proposed in orthogonal frequency division multiplexing(OFDM)-based visible light communication(VLC) system.In the proposed scheme, a two-dimensional(2 D) logistic-sine-coupling map(LSCM) is employed to generate two chaotic sequences. One is used to scramble the 16 quadrature amplitude modulation(QAM) symbols, and the other is used to scramble the rows of standard Walsh-Hadamard transform(WHT). The simulation results show that the proposed scheme can not only reduce the peak-average-power ratio(PAPR) but also achieve the image secure transmission over OFDM-based VLC systems.

关 键 词：OFDM VLC LSCM QAM 

分 类 号：TN[电子电信]