可见光通信自适应O-OFDM符号分解串行传输系统设计与研究  

Design and research of adaptive O-OFDM symbol decomposing with serial transmission system in visible light communication

作　　者：贾科军[1] 杨博然 曹明华[1] 黎锁平[2] 郝莉[3] JIA Kejun;YANG Boran;CAO Minghua;LI Suoping;HAO Li(School of Computer and Communication,Lanzhou University of Technology,Lanzhou 730050,China;School of Science,Lanzhou University of Technology,Lanzhou 730050,China;School of Information Science and Technology,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]兰州理工大学计算机与通信学院,甘肃兰州730050 [2]兰州理工大学理学院,甘肃兰州730050 [3]西南交通大学信息科学与技术学院,四川成都610031

出　　处：《通信学报》2020年第9期179-189,共11页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61461026);甘肃省自然科学基金资助项目(No.18JR3RA153)。

摘　　要：迭代信号限幅(ISC)和符号分解串行传输(SDST)技术将光正交频分复用(O-OFDM)符号分解为固定数量的多个小幅度符号,但当O-OFDM符号方差较小时,分解符号中有大量不载荷信息的全零符号,导致误码率变差、光功率损耗和信息速率降低。针对这一问题,提出了自适应O-OFDM符号分解串行传输(ASDST)系统,根据O-OFDM符号的幅度大小自适应决定符号分解,直到O-OFDM符号完全分解或达到最大符号分解次数,从而消除了全零符号,减少了平均符号分解次数。理论分析和蒙特卡罗仿真验证了ASDST系统的性能。Iterative signal clipping(ISC)and symbol decomposing with serial transmission(SDST)techniques decompose optical orthogonal frequency division multiplexing(O-OFDM)symbol into the fixed number of multiple small-amplitude symbols.However,at low O-OFDM symbol variances,the decomposition symbols contain a large amount of all-zero symbols without load information,which results in bit error rate degradation,optical power penalty and information rate reduction.Aim at this problem,an adaptive O-OFDM symbol decomposing with serial transmission(ASDST)system was proposed,the symbol decomposition was adaptively determined according to the O-OFDM symbol amplitude.Symbol decomposition was terminated until O-OFDM symbol was completely decomposed or the maximum symbol decomposition times were attained,thereby eliminated all-zero symbols and reduced the average symbol decomposition times.The performance of ASDST system was verified by theoretical analysis and Monte Carlo simulation.

关 键 词：可见光通信 光正交频分复用 符号分解串行传输 自适应技术 

分 类 号：TN929.12[电子电信—通信与信息系统]