空间光通信接收器孔径平均函数的二维映射计算方法  

Two-dimensional mapping calculation method for aperture averaging function of space optical communication receiver

作　　者：杨昌旗 YANG Changqi(Key Laboratory of Photoelectric Sensing Logging in Shaanxi Province,Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]西安石油大学陕西省光电传感测井重点实验室,西安710065

出　　处：《光通信技术》2024年第5期8-13,共6页Optical Communication Technology

基　　金：陕西省教育厅自然科学基金项目(批准号:15JK1589)资助。

摘　　要：针对现有研究中缺乏计算具有任意形状光学接收器孔径平均函数方法的问题,提出了一种新颖的二维映射方法。首先,将接收器的数学形状映射为一个二维矩阵,并基于该矩阵构建基准孔径、位移孔径,并确定位移范围。然后,通过逐步移动位移孔径获得一系列可变的位移矩阵。随后,通过计算位移矩阵和基准矩阵之间的相同元素,得到不同质心间距矢量下的孔径重叠面积,从而精确地求得接收器孔径平均函数。最后,以计算卡塞格林望远镜的孔径平均函数为例,将其映射为300×300的矩阵,并与理论计算结果进行了比较。对比结果表明,该方法在计算孔径平均函数时具有极小的误差,验证了所提方法的准确性和可靠性。In response to the lack of methods for calculating the aperture averaging function of optical receivers with arbitrary shapes in existing research,a novel two-dimensional mapping method is proposed.Firstly,the mathematical shape of the receiver is mapped into a two-dimensional matrix,and based on this matrix,a reference aperture and a displacement aperture are constructed,and the displacement range is determined.Then,a series of variable displacement matrices are obtained by gradually moving the displacement aperture.Subsequently,by calculating the same elements between the displacement matrix and the reference matrix,the aperture overlap area under different centroid spacing vectors is obtained,thereby accurately calculating the aperture averaging function of the receiver.Finally,taking the calculation of the aperture averaging function of a Cassegrain telescope as an example,it is mapped into a 300×300 matrix and compared with the theoretical calculation results.The comparison results show that the method has extremely small errors in calculating the aperture averaging function,verifying the accuracy and reliability of the proposed method.

关 键 词：大气传播 孔径平均 闪烁 光学接收器 自由空间光通信 

分 类 号：TN292.12[电子电信—物理电子学] O436[机械工程—光学工程]