Journal of Positioning, Navigation, and Timing

The Institute of Positioning, Navigation, and Timing (항법시스템학회)
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RTT-Enabled Doppler Positioning in LEO-PNT Systems

저궤도 위성 항법 시스템에서의 왕복시간 및 도플러 천이 기반 위치 측위 기법 설계

  • Duhui Yang (Department of Electronic Engineering, Hanyang University) ;
  • Jeongwan Kang (Department of Electronic Engineering, Hanyang University) ;
  • Minsoo Jeong (Department of Electronic Engineering, Hanyang University) ;
  • Sunwoo Kim (Department of Electronic Engineering, Hanyang University)
  • Received : 2024.08.14
  • Accepted : 2024.08.27
  • Published : 2024.09.15
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Abstract

In this paper, we propose a round trip time (RTT)-enabled Doppler-based positioning method considering the low earth orbit (LEO) satellite visibility restriction. Doppler-based positioning typically requires visibility to at least eight satellites, which is often unfeasible due to the limited coverage of LEO satellites, as beamforming technique is applied to current LEO satellites. To solve this problem, we utilize the RTT measurements, assuming that a communication link exists between the user equipment (UE) and LEO satellites. We employ the Newton-Raphson method to estimate the UE position with RTT and Doppler measurements. We analyze the positioning performance of the considered framework via simulation, demonstrating its performance in 3D positioning errors under varying satellite numbers and measurement errors.

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Acknowledgement

이 연구 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임 (No. NRF-2023R1A2C3002890).

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