排序方式: 共有12条查询结果,搜索用时 7 毫秒
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大气信道间距与光束数目对光强起伏的影响 总被引:1,自引:0,他引:1
在Kolmogorov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。 相似文献
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部分相干光通过强湍流对光强闪烁的影响 总被引:3,自引:2,他引:1
在Rytov方差的基础上,利用Andrews的唯像闪烁模型,推导出部分相干光通过强大气湍流后的对数光强起伏方差,并在此基础上进行了仿真。结果表明:与光源的相干性变差,即变为部分相干光后,对数光强起伏方差变小;当采用多束部分相干光通过大气湍流时,接收面上光强起伏方差得到明显改善,而且光束越多,改善越明显。但利用部分相干光通信时,传输距离受限制,所以,光源的相干参数选择要适当。 相似文献
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On the basis of Kolmogorov's theorem, the physical meanings of beams' correlation function on received plane are extended. Approximate formula of channels' across correlation coefficient is deduced from multiple beams through atmosphere. And the scintillation variance of multiple beams is also induced. The result shows along with the channels close to one another, the correlation coefficient increases, and so does the scintillation variance. When the channels completely combine, the scintillation variance of multiple channels is with no difference from that of one channel. 相似文献
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