Single Antenna Based GPS Signal Reception Condition Classification Using Machine Learning Approaches
Sanghyun Kim, Seunghyeon Park, Jiwon Seo
https://doi.org/10.11003/JPNT.2023.12.2.149
In urban areas it can be difficult to utilize global navigation satellite systems (GNSS) due to signal reflections and blockages. It is thus crucial to detect reflected or blocked signals because they lead to significant degradation of GNSS positioning accuracy. In a previous study,…
Preliminary Analysis of Precise Point Positioning Performance Using Correction of Tropospheric Delay Gradient
Bu-Gyeom Kim, Changdon Kee
https://doi.org/10.11003/JPNT.2023.12.2.141
In this paper, impacts of tropospheric delay gradient correction on PPP positioning performance were analyzed. A correction for tropospheric delay error due to the gradient was created and applied using external data, and reference station data were collected on…
Performance Evaluation of a Compressed-State Constraint Kalman Filter for a Visual/Inertial/GNSS Navigation System
Yu Dam Lee, Taek Geun Lee, Hyung Keun Lee
https://doi.org/10.11003/JPNT.2023.12.2.129
Autonomous driving systems are likely to be operated in various complex environments. However, the well-known integrated Global Navigation Satellite System (GNSS)/Inertial Navigation System (INS), which is currently the major source for absolute position…
A Modified Klobuchar Model Reflecting Characteristics of Ionospheric Delay Error in the Korea Region
Dana Park, Young Jae Lee
https://doi.org/10.11003/JPNT.2023.12.2.121
When calculating the user’s position using satellite signals, the signals originating from the satellite pass through the ionosphere and troposphere to the user. In particular, the ionosphere delay error that occurs when passing through the ionosphere delays…
Ionospheric Model Performance of GPS, QZSS, and BeiDou on the Korean Peninsula
Serim Bak, Beomsoo Kim, Su-Kyung Kim, Sung Chun Bu, Chul Soo Lee
https://doi.org/10.11003/JPNT.2023.12.2.113
Satellite navigation systems, with the exception of the GLObal NAvigation Satellite System (GLONASS), adopt ionosphere models and provide ionospheric coefficients to single-frequency users via navigation messages to correct ionospheric delay,…
A Spoofing Detection Scheme Based on Elevation Masked-Relative Received Power in GPS Receivers using Multi-band Array Antenna
Junwoo Jung, Hyunhee Won, Sungyeol Park, Haengik Kang, Seungbok Kwon, Byeongjin Yu, Seungwoo Seo
https://doi.org/10.11003/JPNT.2023.12.2.101
Many spoofing detection studies have been conducted to cope with the most difficult types of deception among various disturbances of GPS, such as jamming, spoofing, and meaconing. In this paper, we propose a spoofing…
Indoor Path Recognition Based on Wi-Fi Fingerprints
Donggyu Lee, Jaehyun Yoo
https://doi.org/10.11003/JPNT.2023.12.2.91
The existing indoor localization method using Wi-Fi fingerprinting has a high collection cost and relatively low accuracy, thus requiring integrated correction of convergence with other technologies. This paper proposes a new method that significantly reduces…
Evaluation of GPU Computing Capacity for All-in-view GNSS SDR Implementation
Yun Sub Choi, Hung Seok Seo, Young Baek Kim
https://doi.org/10.11003/JPNT.2023.12.1.75
In this study, we design an optimized Graphics Processing Unit (GPU)-based GNSS signal processing technique with the goal of designing and implementing a GNSS Software Defined Receiver (SDR) that can operate in real time all-in-view mode under multi-constellation…
A Modelling and Control Method for a Hybrid ROV/AUV for Underwater Exploration
Nak Yong Ko, Jiyoun Moon
https://doi.org/10.11003/JPNT.2023.12.1.67
As interest in underwater structures and ocean exploration increases, many researchers are proposing methods for modeling and controlling various remotely operated vehicles (ROVs). Recently, hybrid systems composed of an autonomous underwater vehicle…
Novel FFT Acquisition Scheme with Baseband Resampling for MultiGNSS Receivers
Jinseok Kim, Sunyong Lee, Hung Seok Seo
https://doi.org/10.11003/JPNT.2023.12.1.59
A GNSS receiver must perform signal acquisition to estimate the code phase and Doppler frequency of the incoming satellite signals, which are essential information for baseband signal processing. Modernized GNSS signals have different modulation schemes and…