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Your search keyword '"Zhang, Jixian"' showing total 13 results
Start Over Author "Zhang, Jixian" Journal remote sensing
13 results on '"Zhang, Jixian"'

13. An Adaptive UWB/MEMS-IMU Complementary Kalman Filter for Indoor Location in NLOS Environment.

Author

Liu, Fei, Li, Xin, Wang, Jian, and Zhang, Jixian

Subjects
MOBILE geographic information systems, MAGNETIC declination, MAGNETIC noise, NOISE measurement, COVARIANCE matrices, KALMAN filtering, UNITS of measurement, INDOOR positioning systems
Abstract

High precision positioning of UWB (ultra-wideband) in NLOS (non-line-of-sight) environment is one of the hot issues in the direction of indoor positioning. In this paper, a method of using a complementary Kalman filter (CKF) to fuse and filter UWB and IMU (inertial measurement unit) data and track the errors of variables such as position, speed, and direction is presented. Based on the uncertainty of magnetometer and acceleration, the noise covariance matrix of magnetometer and accelerometer is calculated dynamically, and then the weight of magnetometer data is set adaptively to correct the directional error of gyroscope. Based on the uncertainty of UWB distance observations, the covariance matrix of UWB measurement noise is calculated dynamically, and then the weight of UWB data observations is set adaptively to correct the position error. The position, velocity and direction errors are corrected by the fusion of UWB and IMU. The experimental results show that the algorithm can reduce the gyroscope deviation with magnetic noise and motion noise, so that the orientation estimates can be improved, as well as the positioning accuracy can be increased with UWB ranging noise. [ABSTRACT FROM AUTHOR]

Published
2019
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