雾天气下多次散射对非视距散射光通信的影响

发布时间：2018-11-26 12:31

【摘要】：基于随机分析理论和概率论,通过利用马可洛夫数据链建立的大气信道多次散射路径损耗预测模型仿真比较了辐射雾条件下不同阶次散射对链路损耗的贡献.结果表明:在雾环境、大气散射光通信链路几何构架各参数给定的情况下,在给定能见度时,考虑发生一阶、二阶、三阶、四阶、五阶散射的光子能量对总接收信号光能量的贡献随通信距离变化时,会出现一个临界的通信距离值;当通信距离小于临界值时,不同阶次散射对总接收信号能量的贡献由大到小的变化关系为一阶、二阶、三阶、四阶、五阶;当通信距离大于临界值时,其变化关系会发生一个翻转,且在雾环境下,不可忽略四阶、五阶散射对总链路损耗的影响,甚至还需考虑更高阶次散射对总链路损耗影响.
[Abstract]:Based on stochastic analysis theory and probability theory, the contribution of different order scattering to link loss under radiation fog is simulated and compared by using the prediction model of multiple scattering path loss of atmospheric channel established by Ma Ke Love data link. The results show that the first order, second order, third order, fourth order are considered for given visibility under the condition of given geometric parameters of atmospheric scattering light communication link in fog environment, and the results show that the first order, the second order, the third order and the fourth order are taken into account when the visibility is given. When the contribution of the fifth order scattering photon energy to the total optical energy of the received signal varies with the communication distance, a critical communication distance will appear. When the communication distance is less than the critical value, the contribution of different order scattering to the total received signal energy varies from large to small as first order, second order, third order, fourth order, fifth order; When the communication distance is larger than the critical value, the change of the relationship will be reversed, and in the fog environment, the influence of the fourth and fifth order scattering on the total link loss should not be ignored, and even the influence of the higher-order scattering on the total link loss should be considered.
【作者单位】：解放军理工大学通信工程学院光电与量子信息技术教研室;南京军区空军94860部队;中国人民解放军73685部队;
【基金】：江苏省科技支撑计划(BE2011177) 江苏省自然科学基金(BK2011114);江苏省自然科学基金(BK2012509) “区域光纤通信网与新型光通信系统国家重点实验室”开放基金资助项目(2013GZKF031304)资助
【分类号】：TN929.12

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