摘要
基于解码转发中继方式,研究了2×2中继条件下混合射频/自由空间光(RF/FSO)航空通信系统的性能。建立了2×2中继混合RF/FSO通信系统模型,利用Meijer’s G函数推导出该系统信噪比的概率分布函数及累积分布函数,并推导了该系统平均误码率(BER)和中断概率的闭合表达式。仿真分析了大气湍流强度、孔径尺寸和调制方式对平均BER和中断概率的影响。结果表明,孔径平均效应可有效改善混合RF/FSO航空通信系统的性能,2×2中继通信系统性能明显优于1×1中继通信系统。
The performance of mixed radio frequency(RF)/free space optical(FSO)airborne communication system based on decoding and 2×2 relaying is analyzed.The model of 2×2 relay-assisted mixed RF/FSO airborne communication system is established,and the probability distribution function and cumulative distribution function about signal-to-noise ratio of this system are derived by Meijer’s G function.Moreover,the closed expressions of average bit-error-rate(BER)and outage probability of the system are obtained.The effects of atmosphere turbulence intensity,aperture size and modulation mode on the average BER and outage probability are analyzed by the simulation.The results show that the aperture averaging effect can effectively improve the performance of mixed RF/FSO airborne communication system,and the performance of the 2×2 relay-assisted communication system is significantly better than that of the 1×1 relay-assisted communication system.
作者
张韵
王翔
赵尚弘
Zhang Yun;Wang Xiang;Zhao Shanghong(Information and Navigation College,Air Force Engineering University,Xi'an,Shaanxi 710077,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第3期30-36,共7页
Acta Optica Sinica
基金
国家自然科学基金(61571461)
