空间光通信中的分布式检测算法  

Distributed Detection for Free-Space Optical Communication Systems

作　　者：黎明[1,2] 杨绍文[1] 李书明[1] 

机构地区：[1]湖北师范学院信息工程系,湖北黄石435002 [2]武汉大学电子信息学院,武汉430079

出　　处：《半导体光电》2012年第1期106-109,共4页Semiconductor Optoelectronics

基　　金：湖北省教育厅基金项目(CXY2009B032;D20102506)

摘　　要：分布式多输入多输出(MIMO)技术是抑制空间光通信中大气湍流效应和降低误包率的有效手段之一。文章首先介绍MIMO光通信系统的信道模型,采用Kalman滤波器对接收信号均值和方差进行自适应估计和预测。然后提出了空间光通信中分布式检测算法,并推导了全局误码率的迭代公式。仿真结果表明:与等增益似然检测算法相比,分布式检测算法在低信噪比时,有较优的误码性能,抗干扰性能强。随信噪比的增加,分布式检测算法的误码率达到一个稳态值。The distributed MIMO technique is one of the effective means to mitigate the effect of atmospheric turbulence and reduce the packet error rate in free-space optical communications.In this paper,the MIMO channel model was introduced,in which the mean and variance of the received signal were adaptively estimated and forecasted with Kalman filter.Then the distributed detection algorithm was proposed for free-space optical communication,and a global error rate was derived in the form of iteration.Simulation results show that：compared with the likelihood detection algorithms,the distributed detection algorithm can own better error performance and stronger anti-jamming under low SNR.With the increasing SNR,bit error rate of the distributed detection algorithm achieves a stable state.

关 键 词：空间光通信 湍流 分布式多入多出 分布式检测 

分 类 号：TN929.12[电子电信—通信与信息系统]