【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。更多还原

【Abstract】 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.更多还原