红外与激光工程, 2005, 34 (1): 114, 网络出版: 2006-05-25
大气光通信中应用最优选择分集
Atmospheric optical communication with optimal selection diversity
摘要
针对大气光通信中湍流对接收端误码率的影响,提出利用空间分集技术,通过对多发射器、多接收器最优选择来改善信噪比,降低误码率.仿真结果表明,当湍流较强时,多发射多接收比单发射单接收对系统的性能有更明显的改善.同时表明,在对数正态分布的光信道上,最优选择的效果与在瑞利衰落的无线信道上的效果基本相同.
Abstract
Space diversity technology is used to overcome the influence of turbulence on BER of receiving terminal in atmospheric optical communication.Optimal transmitters or/and receivers are selected from multiple transmitters and receivers to improve SNR and decreade BER. Simulation results show that when the turbulence is strong,considerable improvement in average BER by means of multiple transmitters or/and receivers than with the system of a transmitter and a receiver is achieved. The result also shows that the effect of the optimal selection is the same significance in atmospheric optical channel of log-normal distribution as in wireless channel of Rayleigh fading.
参考文献
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吴长奇, 潘继敏, 于荣金. 大气光通信中应用最优选择分集[J]. 红外与激光工程, 2005, 34(1): 114. 吴长奇, 潘继敏, 于荣金. Atmospheric optical communication with optimal selection diversity[J]. Infrared and Laser Engineering, 2005, 34(1): 114.
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