国防科技大学学报2017，Vol.39Issue(5)：115-121,7.DOI:10.11887/j.cn.201705019
反射射线追踪技术在城市场景多径预测中的应用
Research on the method of multipath prediction in city scene based on backward ray tracing
摘要
Abstract
Multipath is the key factor which affects communication,navigation system performance.It not only affects the signal power,but also causes time delay,frequency shift and polarization parameters changing,resulting in a decrease in the communication and navigation system.To solve this problem,the fast reverse ray tracing algorithm based on virtual source tree,partition,backward detection,was proposed to predict multipath signal loss and delay distribution accurately.Besides,the urban scenes were taken as examples to show the algorithm of signal multipath transmission,and the diffraction algorithm was studied to improve the accuracy of the prediction.Taking the signal propagation through simplified street models for example,the consistency of reflection path and power distribution can be proved by comparing with the MATLAB program based on the proposed algorithm and the simulation from using Wireless Insite software,in which way,the validity of the algorithm was also verified.关键词
多径预测/射线跟踪/反向算法/绕射算法Key words
multipath prediction/ray tracing/reverse algorithm/diffraction algorithm分类
数理科学引用本文复制引用
郭淑霞,于学伟,王亚锋,高颖..反射射线追踪技术在城市场景多径预测中的应用[J].国防科技大学学报,2017,39(5):115-121,7.基金项目
国家自然科学基金资助项目(61571368) （61571368）
国家部委基金资助项目(2016607C10,61423010601,41409040101) （2016607C10,61423010601,41409040101）
