一种改进的物理统计模型(英文)  

An improved physical-statistical model

作　　者：杨怡怀[1] 申东娅[1] 曹红亮[1] 崔燕妮[1] 赵世平 

机构地区：[1]云南大学信息学院,云南昆明650091 [2]国家863软件专业孵化皿昆明基地,云南昆明650106

出　　处：《云南大学学报（自然科学版）》2006年第4期298-302,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：The paperis supported by National Natural Science Foundation of China(60172006)andInternational Scientific and Tech-nical Cooperation of Yunnan Province(2003GH09).

摘　　要：用统计的研究方法分析Maciel-Bertoni-Xia无线传播模型,提出了一种改进了的物理统计模型.不同于原模型参数为确定值,物理统计模型假设模型中的参数为统计变量,并通过一阶特性:概率密度函数(PDF)和累积分布函数(CDF),特别是二阶特性:电平通过率(LCR)和平均持续衰落时间(ADF)研究了新模型的特性.A physical-statistical propagation model is proposed by combination the statistical method with the Macid-Bertoni-Xia radio model. It is assumed that the average roof top level is not a deterministic variable like those in theory propagation models, but a statistical variable. The performance of the model is studied by simulating probability density functions （PDFs）, cumulative distribution functions （CDFs）. Finally, the second order characteristics for the proposed model is researched. Levd cross rates （LCRs） and average duration of fades （ADFs） are given by assuming that the vehicle moves at the rate of 36 kilometers per hour in building-up areas.

关 键 词：无线电波传播 移动通信 对数正态分布 

分 类 号：TN92[电子电信—通信与信息系统]