提高DWM1000模块UWB定位精度的技术分析

Technical Analysis of Improving the Positioning Accuracy of DWM1000 Module UWB

为了有效地提高超宽带技术的定位精度的同时降低系统实现的复杂度,通过对比各种无线定位技术,提出了基于Decawave的射频芯片DWM1000的UWB定位方案。使用TDOA定位算法能够很好地采用UWB测距技术中基于接收信号时间法的双边测距,在获得信号的传输时间之后,便可根据参考节点的坐标和接收信号时间来联立方程组,以计算目标节点的具体坐标,提高了定位精度。经实验研究表明,在100m范围内,TOF也只有3.35×10^-5s秒,所以误差为6.7×10^-10s秒,误差范围大约20cm。

In order to ffctively improve the positioning accuracy of ulra-wideband technology and reduce the complexity of system implementation,a UWB positioning scheme based on DWM1000 RF chip is proposed by comparing various wireless positioning technologies.Using TDOA location algorithm can well use the two-sided distance measurement based on the time method of receiving signal in UWB distance measurement technology.After obtaining the transmision time of the signal,the equations can be set up according to the coordinates of the reference node and the time of receiving signal,so as to calculate the specific coordinates of the target node and improve the positioning accuracy.The experimental resules show that within 100 meters,TOF is only 3.35×10^-5s seconds,so the error is 6.7×10^-10s seconds,and the error range is about 20cm.