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Low-Cost LoRa Geolocation: A TDOA Solution Based on On-Chip Signal Detection and GNSS Time Service
ZHANG Hongwei,CHEN Xinyu,LIU Shaohua *
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876;School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876;School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876
*Correspondence author
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Funding: none
Opened online:18 March 2019
Accepted by: none
Citation: ZHANG Hongwei,CHEN Xinyu,LIU Shaohua.Low-Cost LoRa Geolocation: A TDOA Solution Based on On-Chip Signal Detection and GNSS Time Service[OL]. [18 March 2019] http://en.paper.edu.cn/en_releasepaper/content/4747754
 
 
In this paper, a LoRa-based geolocation solution is introduced, which is focused on the low-cost and easy-to-use. The solution takes advantage of the global navigation satellite system (GNSS) time service as a precise reference to get the Time Difference of Arrival (TDOA) on rising-edge of the receiving signal detected by reference station. The accuracy of the geolocation is mainly limited to jitter of the rising-edge caused by the bandwidth; Thus, we conducted futher mesurement and simulation to determine the deviation of geolocation so as to verify the feasiblity of the solution: 174m-319m in 50%-90% CEP is the acceptable accuracy of geolocation in many low-cost Internet of things (IoT) systems. More geolocation applications could be developed based on this research.
Keywords:Internet of Things; LoRa; LoRa Geolocation; Time Difference of Arrival (TDOA)
 
 
 

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