Sensors, Vol. 20, Pages 6513: Optimization of Time Synchronization and Algorithms with TDOA Based Indoor Positioning Technique for Internet of Things

Sensors, Vol. 20, Pages 6513: Optimization of Time Synchronization and Algorithms with TDOA Based Indoor Positioning Technique for Internet of Things Sensors doi: 10.3390/s20226513 Authors: Zhao Zhao Zheng Yu Ma Rabie Kharel To provide high-precision positioning for Internet of Things (IoT) scenarios, we optimize the indoor positioning technique based on Ultra-Wideband (UWB) Time Difference of Arrival (TDOA) equipment. This paper analyzes sources of positioning error and improves the time synchronization algorithm based on the synchronization packet. Then we use the labels of the known position to further optimize the time synchronization performance, and hence improve TDOA measurements. After time synchronization optimization, a Weighted Least Square (WLS) and Taylor coordination algorithm is derived. Experiments show that our optimization reduces the average positioning error from 54.8 cm to 12.6 cm.
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
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