【摘要】 为了减小大气闪烁对自由空间光通信的通信性能的影响,基于光信号的对数振幅序列服从联合高斯分布特性,提出了一种最大后验概率算法,给出了随时间变化的判决阈值。模拟结果表明,此算法可以有效减小大气闪烁对通信性能的影响,降低其误码率。更多还原

【Abstract】 Based on the joint Gaussian distribution of optical signal log-amplitude sequence,an algorithm for Maximum a posteriori probability(MAP) detection was proposed to mitigate effects of atmospheric scintillation on the performance of the free-space optical communication.And the bit error rate for the proposed algorithm was simulated.Simulation results show that the proposed algorithm for MAP detection based on the joint Gaussian distribution mitigates effects of atmospheric scintillation on the communication performance and leads to a furthest improvement in detection performance,compared with maximum-likelihood symbol-by-symbol detection and MAP symbol-by-symbol detection.更多还原