摘要
针对数字脉冲间隔调制(DPIM)存在的问题和性能方面的不足,提出了一种新型的双幅度定长脉冲间隔调制(DAFDPIM)方式,对其调制结构进行了详细阐述,讨论了发射功率、带宽需求、传输容量和差错性能等问题,并与其他几种DPIM的改进方式进行了仿真对比。理论分析和仿真结果表明:这种新型的DAFDPIM方式能实现性能方面较好的平衡,并解决了DPIM符号长度不固定的问题,在无线光通信系统中具有一定的应用前景。
Aiming at the problems and performance shortage of digital pulse interval modulation （PDM）, a novel dual-amplitude fixed length digital pulse interval modulation （DAFDPIM） scheme is proposed. The structure of the modulation is described in detail. The transmit power, bandwidth requirement, transmission capacity and error performance are discussed. Then these performances are compared with several other improved DPIM modulation. The theoretical analysis and simulation results show that this novel DAFDPIM can achieve a good balance on various performances and make up the lack of the DPIM with unfixed symbol length. Hence, this novel modulation scheme is superior in optical wireless communication system.
出处
《激光与光电子学进展》
CSCD
北大核心
2014年第9期68-74,共7页
Laser & Optoelectronics Progress
基金
重庆市自然科学基金(cstc2012jjA40033)
关键词
光通信
双幅度定长脉冲间隔调制
性能分析
发射功率
带宽需求
误时隙率
optical communications
dual-amplitude fixed length digital pulse interval modulation
performance analysis
transmit power
bandwidth requirement
slot error rate
