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分析了Gamma-Gamma大气信道模型下无线光载射频(ROFSO)通信系统传输BPSK信号的误码率性能,推导出了该系统的误码率公式,并且利用Matlab软件计算出理论值与仿真结果。研究发现,ROFSO系统与使用OOK调制的常规FSO系统相比具有良好的误码率性能,不需要门限判决,不存在性能限。同时,通过分析传输距离、接收天线孔径和大气折射率结构常数等参数对系统的影响,得到了不同参数对系统影响的规律。
The bit error rate (BER) performance of BPSK signals transmitted by wireless optical carrier radio frequency (ROFSO) communication system under Gamma-Gamma atmospheric channel model is analyzed. The error rate formula of the system is derived and the theoretical value and simulation results are calculated by Matlab software. The study found that the ROFSO system has good bit error rate performance compared with the conventional FSO system using OOK modulation, does not require threshold decision and has no performance limit. At the same time, the influences of different parameters such as transmission distance, receiving antenna aperture and atmospheric refractive index structure constant on the system are analyzed.