超宽带室外信道路径损耗统计模型分析  

A Statistical Path Loss Model for UWB Outdoor Channel

作　　者：何一[1] 王永生[1] 张亚妮[2] 张斌 

机构地区：[1]西北工业大学,西安710072 [2]西安通信学院,西安710106 [3]中国兵器工业第203研究所,西安710065

出　　处：《弹箭与制导学报》2008年第4期272-275,共4页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：教育部高校博士学科点基金(20060699010);“十一五”国防预研基金资助

摘　　要：在超宽带信号室外传播信道测量的基础上,给出了视距和非视距接收信号的波形;根据测量结果,建立了室外路径损耗统计模型,由最小二乘法确定了路径损耗指数;采用频数直方图和参数的最大似然估计法分析了阴影衰落的分布方式,并用假设检验的方式指出阴影衰落服从正态分布;模型仿真结果验证了模型的合理性。The measurement for propagation behavior of ultra-wideband （UWB） signals in outdoor environments was presented. The receiving signal profiles for the line-of-sight （LOS） and non-line of-sight （NLOS） cases were given. According to the measurement result, the path loss statistical model for outdoor country environment was built and the path-loss exponent by least squares method was given. Frequency histogram and maximum likelihood estimation （MLE） were used to analyze the distribution mode of the shadow fading. It can be confirmed that the shadow fading accords with the normal distribution using the theory of testing hypothesis. The path loss model is proved to be valid by computer simulation.

关 键 词：超宽带 路径损耗模型 无线电传播 

分 类 号：TN92[电子电信—通信与信息系统]