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.
出处
《弹箭与制导学报》
CSCD
北大核心
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
关键词
超宽带
路径损耗模型
无线电传播
ultra-wideband （UWB）
path loss model, radio propagation
作者简介
何一（1973-），男，陕西西安人，博士研究生，研究方向：无人机数据链技术。
