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A CSI-Based Indoor Positioning System Using Single UWB Ranging Correction
| Content Provider | MDPI |
|---|---|
| Author | Long, Keliu Kong, Darryl Franck Nsalo Zhang, Kun Tian, Chuan Shen, Chong |
| Copyright Year | 2021 |
| Description | A fingerprint-based localization system is an economic way to solve an indoor positioning problem. However, the traditional off-line fingerprint collection stage is a time-consuming and laborious process which limits the use of fingerprint-based localization systems. In this paper, based on ubiquitous Wireless Fidelity (Wi-Fi) equipment and a low-cost Ultra-Wideband (UWB) ranging system (with only one UWB anchor), a ready-to-use indoor localization system is proposed to realize long-term and high-accuracy indoor positioning. More specifically, in this system, it is divided into two stages: (1) an initial stage, and (2) a positioning stage. In the initial stage, an Inertial Measure Unit (IMU) is used to calculate the position using Pedestrian Dead Reckon (PDR) algorithm within a preset number of steps, and the location-related fingerprints are collected to train a Convolutional Neural Network (CNN) regression model; simultaneously, in order to make the UWB ranging system adapt to the Non-Line-of-Sight (NLoS) environment, the increments of acceleration and angular velocity in IMU and the increments of single UWB ranging measures are correlated to pre-train a Supported Vector Regression (SVR). After reaching the threshold of time or step number, the system is changed into a positioning stage, and the CNN predicts the position calibrated by corrected UWB ranging. At last, a series of practical experiments are conducted in the real environment; the experiment results show that, due to the corrected UWB ranging measures calibrating the CNN parameters in every positioning period, this system has stable localization results in a comparative long-term range. Additionally, it has the advantages of stability, low cost, anti-noise, etc. |
| Starting Page | 6447 |
| e-ISSN | 14248220 |
| DOI | 10.3390/s21196447 |
| Journal | Sensors |
| Issue Number | 19 |
| Volume Number | 21 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-27 |
| Access Restriction | Open |
| Subject Keyword | Sensors Industrial Engineering Channel State Information Deep Learning Indoor Localization Localization Calibration Uwb Ranging |
| Content Type | Text |
| Resource Type | Article |
