摘要
本文设计基于马赫-增德尔构成的PSK调制模型,并分析采用零差相干解调的方式下的系统误码率。搭建基于PSK调制的相干光通信系统模型,在新型光学软件Optisystem软件平台下完成系统的模拟仿真,分析大气湍流对光PSK调制的相干光通信的性能影响,并完成对三种光PSK调制方式的比较。仿真结果表明:在不考虑大气湍流的情况下,BPSK调制的系统误码率最低,QPSK调制与BPSK两者误码率相差较小;随着湍流程度的增加,系统的误码性能降低。对比三种调制方式,BPSK调制更具有优势。
This PSK modulation model based on Mach Zehnder has designed, and the BER performance of homodyne coherent demodulation mode has analyzed. A coherent optical communication system model based on PSK modulation has built, and the system simulation has completed under the Optisystem software platform that the new optical software. Performance influent of atmospheric turbulence based on PSK modulated optical coherent optical communication has analyse and the comparison of three kinds of light PSK modulation scheme has completed. Simulation results show that ： in the case without considering turbulence, the BER performace of BPSK modulation is lowest, and the BER difference between QPSK and BPSK modulation is small. With the intensity of turbulence increased, the BER perform- ance of the system decreased. Compare three modulation mode, BPSK modulation has more advantages.
出处
《激光杂志》
北大核心
2016年第10期111-115,共5页
Laser Journal
