摘要：

针对3种典型城市应用环境的无线传感器网络(WSN)信道模型，采用3种频段信号的传播路径损耗特性进行现场实验测试，使用最小二乘法对测量结果进行线性回归分析。分析结果表明，城市环境下的WSN信道与传统蜂窝无线信道模型有较大差异，但仍可采用双折线对数距离损耗模型进行拟合，同时得到WSN的信道传播特性和规律，可为城市环境WSN的设计和工程应用提供依据。

关键词: 无线传感器网络, 信道模型, 城市环境, 路径损耗模型, 线性回归, 最小二乘法

Abstract:

A recent path loss measurement is presented in two typical kinds of outdoor urban application environment for Wire- less Sensor Network(WSN) channel model in three different frequency channels. The measured data are analyzed by least square linear regression method. The results indicate that radio channel is different from the traditional one, but two slope log distance path loss models are still acceptable. The analysis outcome can provide the evidence of design and engineering application for WSN in urban application environment.

Key words: Wireless Sensor Network(WSN), channel model, urban environment, path loss model, linear regression, least square method

中图分类号: 

• TP393