UWB测距与室内定位精度研究

摘要

In this paper,through the experiment,has tested the accuracy of UWB tech-nology ranging and indoor positioning,and analyzed the error source of UWB technology ranging and indoor positioning.The data showed that UWB indoor ranging accuracy is not only effected by the multi-path and blocking,but also effected by the anisotropic of antenna group delay.And,the multi-paths effect is not the main source of the error.The ranging er-ror that the antenna group delay causes has the strong regularity,to a certain extent can treat as the systematic error to weaken it;The error that the blocking causes is most seri-ous,but can reduced through build Anchors reasonably.In brief,the precision and stability of current low cost UWB product have been able to fit the needs of some users,and It has the possibility of promotion.%本文通过实验,测试和分析了 UWB 技术测距和室内定位的精度以及影响精度的因素。数据表明,UWB 室内测距精度不仅受到多路径和遮挡的影响,还受到天线群延迟的各向异性的影响。其中,多路径造成的误差范围相对较小；天线群延迟的各向异性造成的测距误差有着较强的规律性,在一定程度上可以当作系统误差将其减弱；遮挡造成的误差最为严重,但可以通过合理布设 Anchor 来尽量避免遮挡造成的影响。总之,目前的低成本 UWB 测距和定位产品的精度和稳定性已经可以满足一部分用户的需求,具备大范围推广实用的可能。