Abstract
The Global Positioning System (GPS) yields good precision and availability in open outdoor environment. However, the errors of GPS may suffer degradation in some complex environments, such as forests and urban canyons. To solve this problem, a new positioning method is designed integrating GPS, Digital Terrestrial Multimedia Broadcast (DTMB) and frequency-modulated (FM) radio signal. In this method, the DTMB transmitter acts as a pseudo-satellite to assist GPS positioning. Furthermore, the FM fingerprint positioning is used to correct the positioning bias. An adaptive selection scheme is proposed to provide an optimal integration mode of the sensors. Field experiments in complex environment were carried out for evaluation. Comparing to the GPS-only and GPS + DTMB approach, positioning accuracy was improved by at least and with the proposed method, respectively.
Highlights
After decades of development, the Global Positioning System (GPS) has become the dominant positioning approach in outdoor environment for its high precision, globalization and real-time response
When geometric dilution of precision (GDOP) of GPS is no greater than a certain threshold, it can be considered that positioning requirement is satisfied and we can use GPS positioning results to correct clock error of the Equation (1) shows the relationship between satellite positions and user location in GPS positioning: ρis =
We can see that the proposed method achieved the best performance among the three methods most of the time considering both absolute trajectory errors (ATE) and relative pose errors (RPE)
Summary
The Global Positioning System (GPS) has become the dominant positioning approach in outdoor environment for its high precision, globalization and real-time response. It might be difficult to receive signals from more than three DTMB transmitters simultaneously due to transmitter planning reasons In this case, navigation information from DTMB and GPS, like pseudo-range and pseudo-range rate, can be fused to provide more accurate user positions than either alone [9,24,25]. Around 100 MHz, makes it much easier to propagate in forests, urban canyons and indoor scenarios than other common signals such as GPS, WiFi and DTMB signal. GPS, DTMB and FM signal and adaptively select the integration mode according to environmental conditions to minimize positioning error. An outdoor positioning system combining GPS, DTMB and FM signals is presented to tackle the positioning problem in complex outdoor environment.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
