摘要
根据ITU-R P.526建议给出的单刃峰绕射损耗曲线,分浅绕射区和深绕射区给出了新的计算公式。在浅绕射区,针对P.526建议公式的适用范围不能覆盖一阶菲涅尔区的不足,利用曲线拟合提出了一个新的计算公式,将适用范围扩展到一阶菲涅尔区以外。在深绕射区,经过理论推导给出了采用不同参数的三种计算公式,便于理解和在山区通信工程中的应用。最后结合实践对新的计算公式进行了讨论,给出了工程应用建议。
According to the single knife-edge diffraction loss curve proposed by the ITU-R P. 526,a new calculation formula is presented. In the shallow diffraction area,aiming at the deficiency that the formula proposed by the ITU-R P. 526 can＇t used in the firstorder Fresnel radius zone,a new formula is proposed by using curve fitting,and the application scope of the new formula can be extended to the first-order Fresnel radius zone. In the deep diffraction area,three formulas,that can be easily understood and be applied in mountain communication field,are derived. Finally,combined with the engineering approximate,the new formulas are discussed,and the proposal of the engineering application is given.
出处
《无线电通信技术》
2015年第1期24-27,共4页
Radio Communications Technology
基金
国家部委基金资助项目
关键词
山区通信
刃峰绕射
电波传播损耗
mountainous communication
knife-edge diffraction
radio wave propagation loss
