no code implementations • 24 Apr 2023 • Halim Lee, Jiwon Seo
The average code computation time of the grid search was extremely large compared with those of the other two algorithms, and gradient descent exhibited the lowest computation time.
no code implementations • 23 Feb 2023 • Halim Lee, Jiwon Seo
The two popular trajectory optimization strategies of UAVs are greedy and predictive approaches.
no code implementations • 19 Jun 2022 • Halim Lee, Taewon Kang, Suhui Jeong, Jiwon Seo
Further, a maximum likelihood problem for target localization combining RF fingerprinting is formulated.
no code implementations • 6 Jun 2022 • Halim Lee, Jiwon Seo, Zaher M. Kassas
From a GNSS-based navigation perspective, the reliability of GNSS signals in different locales, which is heavily dependent on the road layout within the surrounding environment, is crucial to ensure safe automated driving.
no code implementations • 3 Nov 2021 • Halim Lee, Sam Pullen, Jiyun Lee, Byungwoon Park, Moonseok Yoon, Jiwon Seo
Ground-based Augmentation System (GBAS) augments Global Navigation Satellite Systems (GNSS) to support the precision approach and landing of aircraft.
no code implementations • 21 Aug 2021 • Sanghyun Kim, Halim Lee, Kwansik Park
In this study, the global positioning system (GPS) multipath detection was performed based on the carrier-to-noise-density ratio, C/N0, measured through a dual-polarized antenna.
no code implementations • 8 Oct 2020 • Halim Lee, Jiwon Seo, Zaher M. Kassas
An integrity-based path planning strategy for autonomous ground vehicle (AGV) navigation in urban environments is developed.
no code implementations • 24 Sep 2020 • Halim Lee, Ali A. Abdallah, Jongmin Park, Jiwon Seo, Zaher M. Kassas
The results show a receiver navigating for 100 m in an indoor environment, while receiving signals from one LTE eNodeB.
no code implementations • 24 Sep 2020 • Suhui Jeong, Halim Lee, Taewon Kang, Jiwon Seo
In this paper, we suggest a method of RSS-based LTE base station (BS) localization with a single mobile receiver when the PLE is unknown.
no code implementations • 24 Sep 2020 • Halim Lee, Jiwon Seo
Alternative navigation technology to global navigation satellite systems (GNSSs) is required for unmanned ground vehicles (UGVs) in multipath environments (such as urban areas).