BAO Xiaoyu, WANG Qing, YANG Yuan, et al. A UWB positioning method for suppressing NLOS error[J]. 2019, 38(9): 9-12. DOI: 10.13873/J.1000-9787(2019)09-0009-04.
Aiming at the problem that ultra-wideband( UWB) equipment
exists standard deviation in indoor environment
ranging data are fitted and standard deviation are solved. device is calibrated. In order to solve the problem that indoors non-line of sight( NLOS) error will reduce the positioning precision
an improved extended Kalman filtering( EKF) algorithm is proposed. A threshold is set to discriminate between line-of-sight( LOS) data and NLOS data. The experimental results show that the proposed method can effectively suppress the adverse effects of standard deviation and non-line-of-sight error on positioning precision. In the LOS environment
both static positioning precision and dynamic positioning precision can reach centimeter level; in NLOS environment
centimeterlevel precision call be reached for static positioning and sub-decimeter level precision for dynamic positioning.