密集多径环境下UWB测距的NLOS误差减小方法  

A NLOS Error Mitigation Method for UWB Ranging in Dense Multi-path Environments

作　　者：吴绍华[1] 张钦宇[2] 张乃通[1] 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001 [2]哈尔滨工业大学深圳研究生院,广东深圳518085

出　　处：《电子学报》2008年第1期39-45,共7页Acta Electronica Sinica

基　　金：国家自然科学基金重点项目(No.60432040)

摘　　要：为减小密集多径环境下超宽带(UWB)测距结果中因为障碍物引起的非视距(NLOS)误差,提出了一种有效的NLOS误差减小方法.此方法考虑了NLOS误差的产生原理及特点,以信号传播的路径损耗模型为基础,通过对接收信号中不同时间到达单径的能量比较,实现了对NLOS误差的粗略估计,进而以此估计值对测距结果进行校正.在方法的具体实现上,给出了一种计算量较小、复杂度较低的单径检测算法.对实测数据的处理验证了方法的正确性,结果表明本文提出的NLOS误差减小方法使UWB测距精度有了较大提升.To mitigate the NLOS （non-line-of-sight） error of LrWB （ultra-wideband） ranging caused by obstructions in dense multi-path environments, an effective NLOS error mitigation method is proposed in this paper. The principles and characteristics of NLOS error are considered, and based on the path loss model of UWB signal, through comparing the energy of paths arriving at different time, the NLOS error estimation is formulated, which is further used to calibrate the original ranging result. A less computational and low complex path detection algorithm is proposed to implement the method. Measured data is used to test the proposed method, and the results show that the ranging precision can be improved significantly.

关 键 词：超宽带 多径 测距 非视距误差 

分 类 号：TN914[电子电信—通信与信息系统]