水平均匀大气中多束光在接收面上的相关性及其对光强起伏的影响

The Correlation Study of Channels in Horizontal Multi-beam Atmospheric Communication

摘要: 在科尔莫戈罗夫理论的基础上，推广了光束在接收面上相关函数的物理含义。分析了多光束在接收面上的相关性。并在此基础上形成多光束光强起伏方差的解析表达式。分析结果表明，随着信道间距的增加，信道相关性下降。到达接收面的光强起伏方差降低；当信道完全重合，即相关系数变为1时，叠加后的光强起伏方差没有明显降低。与单光束时没有区别；在允许范围内增加光束数目可降低光强起伏。

Abstract: On the basis of Kolmogorov theory,the physical meaning of beam correlation function on receiving plane is extended.Based on the correlation analysis of multiple beams crossing over the atmosphere.The analytical solution formula of the light-intensity oscillation variance of multiple beams is deduced.The result shows along with the spacing increase of channels,the channel correlation decreases,and so does the oscillation variance.When the channels overlap completely,the light-intensity oscillation variance of multiple channels is no difference from that of one channel.