无线传感器网络中的TOA测距方法研究

Research of TOA Ranging Method in Wireless Sensor Network

摘要: 介绍了目前常用的无线传感器网络测距方法，对TOA测距方法进行了详细的误差分析，并提出采用SDS－TWR方法来降低TOA方法测距误差的方案。实验结果表明，SDS－TWR方法能有效降低晶体振荡器频率漂移所带来的测距误差，提高TOA测距方法的测距精度。

Abstract: The paper introduced several ranging methods commonly used in wireless sensor network, did error analysis of TOA ranging method specifically, and proposed a scheme of using SDS-TWR method to reduce ranging error of TOA. The experimental result showed that SDS-TWR method can effectively reduce ranging error caused by frequency drift of crystal oscillator and improve ranging accuracy of TOA.