可见光通信中的定长双宽数字脉冲间隔调制  

Fixed Length Dual Duration Digital Pulse Interval Modulation for Visible Light Communications

作　　者：宋小庆[1] 贾胜杰 赵梓旭[1] 魏有财 Song Xiaoqing Jia Shengjie Zhao Zixu Wei Youcai(Department of Control Engineering, Academy of Armored Force Engineering, Beijing 100072, China)

机构地区：[1]装甲兵工程学院控制工程系,北京100072

出　　处：《激光与光电子学进展》2016年第11期57-63,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51507190);军队科研计划项目(2014zx28)

摘　　要：数字脉冲间隔调制(DPIM)对缓存性能要求较高,相对于定长型调制方式存在一定的劣势。为此,提出了一种新型定长双宽数字脉冲间隔调制(FDD-DPIM),给出其符号结构,通过仿真和实验对比分析了二进制开关键控(OOK)、DPIM、定长数字脉冲间隔调制(FDPIM)、定长数字振幅脉冲间隔调制(FDAPIM)以及双幅度定长数字脉冲间隔调制(DAFDPIM)的带宽需求、平均发射功率及差错性能。结果表明:提出的FDD-DPIM具有更高的带宽利用率和平均发射功率,同时差错性能优于DAFDPIM,在可见光通信系统中具有一定的应用前景。The digital pulse interval modulation （DPIM） has a higher requirement on the buffer performance compared with the fixed length modulations. So a novel fixed length dual duration digital pulse interval modulation （FDD-DPIM） is presented, and its symbol structure is introduced as well. Through simulations and experiments, the bandwidth requirement, average transmission power and error rate performance of the FDD-DPIM are analyzed compared with those of the binary on-off keying （OOK）, DPIM, fixed-length digital pulse interval modulation （FDPIM）, fixed length dual-amplitude pulse interval modulation （FDAPIM） and dual-amplitude fixed length digital pulse interval modulation （DAFDPIM）. The results show that the FDD-DPIM offers higher bandwidth efficiency and average transmission power, and has better error rate performance than the DAFDPIM. Hence, it is believed to be suitable in the visible light communications （VLC） application.

关 键 词：光通信 调制方式 数字脉冲间隔调制 误包率 

分 类 号：TN929.12[电子电信—通信与信息系统]