一种新的自适应增益盲优化算法提高自由空间光通信性能

Improving performance of free space optical communication using an adaptive gain blind optimization algorithm

由于大气湍流的影响,光束在大气中传输时产生严重畸变,造成自由空间光(FSO)通信链路性能恶化。为了提高系统性能,构建了基于盲优化自适应光学的FSO通信系统,提出了一种新的自适应增益随机并行梯度下降(SPGD)优化算法。数值模拟结果表明,本文算法对大气湍流引起的波前误差进行实时补偿,能够达到很好的校正效果,比固定增益优化算法具有更好的收敛速度和精度。

Free space optical communication systems can be severely affected by atmospheric turbulence which causes optical wavefront distortion and degrades comunication link performance. In order to a- chieve real-time compensation of wavefront error caused by atmospheric turbulence and improve single model coupling efficiency, the free space optical communication system based on adaptive optics technolo- gy is adopted, and an adaptive gain stochastic paraell gradient descent （SPGD） optimization algorithm is proposed. The results show that the blind optimization adaptive optics technology has good correction effect and the adaptive gain optimization algorithm is better than the fixed gain optimization algorithm.