无线传感器网络中基于RSSI的测距研究

节点定位在无线传感器网络应用中具有很重要的意义,基于RSSI测距技术以其低成本、低复杂度的特点被广泛应用于无线传感器网络定位中。首先介绍了RSSI测距原理,然后对目前常用的数据预处理模型进行分析。最后在CC2430的硬件平台上进行实验,获取不同距离点处的RSSI值,进行统计分析,并观察3种数据处理模型下的测距精度。实验结果表明,混合模型预处理方式在测距精度和计算复杂度方面具有一定优势。

Research on distance measurement based on RSSI in wireless sensor networks

In the wireless sensor networks, the position information of the nodes have many important significance. Distance measurement based on RSSI, featuring low communication overhead and low complexity, is widely applied in the localization of the wireless sensor networks. Firstly, this paper summarizes the working principle of distance measurement based on RSSI, and then analyze the commonly used data preprocessing models, finally using CC2430- based hardwire platform to get and analyze RSSI from different distance, and observe the measurement error of the three methods. Experiments show that mixed model has good performance in accuracy and complexity.