野外地表无线传感网信道传播模型的测定与分析  

Measurement and analysis of radio channel model for near-ground wireless sensor network

作　　者：沈杰[1] 姚道远[1] 黄河清[1] 马奎[1] 刘海涛[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所无线传感器网络与通信重点实验室,上海200050

出　　处：《光学精密工程》2008年第1期141-149,共9页Optics and Precision Engineering

基　　金：中国科学院知识创新工程基金资助项目(No.KGCX2-YW-110-1)

摘　　要：针对三种典型传感网的野外布设环境,对地表低空收发天线的路径损耗特性进行了现场实验测定,并对测试结果进行了线性拟合分析和建模。测试和拟合结果表明,地表无线信道与传统蜂窝无线信道模型存在较大差别,但仍可采用单折线或双折线模型进行表征,同时得出了一些有助于研究和设计无线传感网的信道传播特性和规律。所得的分析结果有助于深入研究野外地表无线传感网络,提高其仿真实际有效性。Most Wireless Sensor Networks（WSNs） assume that sensor nodes are scattered on the ground, which is hard to characterize the radio propagation properties by real measurements. So the path loss model of the near-ground propagation in suburban areas is measured, and useful model parameters are obtained by linearity regression. The irregularity of near-ground radio propagation is measured, and its impact on the design of MSNs is also analyzed. The experimental results indicate that the near-ground radio channel model is more different from traditional one, but can be characterized by the single and double regression models also. The model can satisfy the requirement of high precise simulation of WSN in suburban area.

关 键 词：无线传感网 信道传播模型 低空地表传播 计算机仿真 

分 类 号：TN915[电子电信—通信与信息系统]