城市信道中大气相干长度测试与分析

Test and analysis of atmospheric coherence length in optical wireless communication channel for urban area

研究采用了理论分析和仿真分析,结合实验验证的研究方法,对城市信道的大气相干长度开展研究。利用大气相干长度和到达角起伏方差之间的定量关系,搭建了城市信道光波传输特性测试平台,开展了城市信道光波传输特性实验测试并获得大量测试数据,通过统计分析得到了不同季节不同时段的到达角起伏方差的最值和均值,反映出北京测试点和成都测试点大气相干长度全年的变动范围。

This paper investigates the atmospheric for characteristics of optical wireless atmospheric coherence length in the urban area. Based on thetest bench transmission built in the urban area and the data generated by itself, statisticalaverages and extremums of the variance of angle-of-arrival fluctuations at different seasons and different hours are obtained. Thus, based on the relationship between the atmospheric coherence length and the variance ofangle-of-arrival fluctuations, this paper gives the various range of the atmospheric coher- ence length.