Abstract: This paper describes the deployment of a wireless sensor network for monitoring humanmotion and position in an indoor environment.An RSSI based localization algorithm is implemented，which uses an in-building radio propagation model and a compensating model to provide accurate indoor location information.The performance of the network protocols and localization algorithm is evaluated using simulated and real experimental data.

Key words: wireless sensor networks, in-building localization, receive signal strength indicator, space compensated model

摘要： 采用基于比较接收信号强度（RSSI）的测距技术，利用中值策略从锚节点多组测量值中选取最合适的RSSI值用于定位计算。针对算法用于室内人员定位的具体需求，采用室内环境下的无线信号传播模型，提出目标节点空间补偿模型，解决了因目标节点与锚节点处于不同平面导致定位误差较大的问题。最后验证改进算法的定位性能有较大提高。

关键词: 无线传感器网络, 室内定位, 接收信号的强度指示（RSSI）, 空间补偿模型