无线光通信中组合脉冲位置调制的差错性能分析  

Analysis of error performance for FCPPM in optical wireless communication

作　　者：黄龙安 陈荣[1] 

机构地区：[1]国家电网公司,义乌322000

出　　处：《国外电子测量技术》2017年第12期40-43,共4页Foreign Electronic Measurement Technology

摘　　要：无线光通信中,光标识组合脉冲位置调制(FCPPM)方法是针对脉冲位置调制(PPM)带宽效率低、传信能力弱而提出的一种新的调制方法。研究了FCPPM系统在理想信道和湍流信道中的误码性能,并将复杂的误码率公式简化为Meijer G函数形式,以便于数学处理。仿真分析了新系统在最大似然序列检测方法下的误码性能,并与OOK和PPM等传统调制方法进行比较。研究结果表明,FCPPM系统误码率随调制级数的增大而降低,随湍流强度的增大而上升;且其误码性能优于OOK,带宽效率和传输容量优于PPM。In wireless optical communications, due to the problem of low bandwidth efficiency and transmission capacity of the conventional pulse position modulation （PPM）, a novel flag compound pulse position modulation （FCPPM） is pro- posed. The error performance of the FCPPM FSO system over ideal channel and turbulence channel are analyzed. The complex formula of bit error rate is simplified by applicating the Meijer G-function. By using the maximum likelihood detection, the error performance of the system are simulated and analyzed. It shows that the BER of the FCPPM FSO system increases with the modulation order decreased or the turbulence intensity increased. The FCPPM yields advantages over the on-off keying （OOK） in terms of error performance. It also provides high bandwidth efficiency and transmis- sion capacity than the pulse position modulation （PPM）.

关 键 词：无线光通信 光标识组合脉冲位置调制 误码率 

分 类 号：TN929.12[电子电信—通信与信息系统]