44 citations · 469 across the 27 of their papers we have counts for
12 papers · 1 filter
Single-Antenna-Based GPS Antijamming Method Exploiting Polarization Diversity
Kwansik Park, Jiwon Seo
The vulnerability of Global Positioning System (GPS) receivers to jammers is a major concern owing to the extremely weak received signal power of GPS. Researches have been conducte…
Integrity-Based Path Planning Strategy for Urban Autonomous Vehicular Navigation Using GPS and Cellular Signals
Halim Lee, Jiwon Seo, Zaher M. Kassas
An integrity-based path planning strategy for autonomous ground vehicle (AGV) navigation in urban environments is developed. The vehicle is assumed to navigate by utilizing cellula…
RSS-based LTE Base Station Localization Using Single Receiver in Environment with Unknown Path-Loss Exponent
Suhui Jeong, Halim Lee, Taewon Kang +1
With the increasing demand for location-based services, localization technology research has recently intensified. Received signal strength (RSS)-based localization has the advanta…
A Preliminary Study of Machine-Learning-Based Ranging with LTE Channel Impulse Response in Multipath Environment
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). In…
Neural Network-Based Ranging with LTE Channel Impulse Response for Localization in Indoor Environments
Halim Lee, Ali A. Abdallah, Jongmin Park +2
A neural network (NN)-based approach for indoor localization via cellular long-term evolution (LTE) signals is proposed. The approach estimates, from the channel impulse response (…
Effect of Outlier Removal from Temporal ASF Corrections on Multichain Loran Positioning Accuracy
Jongmin Park, Pyo-Woong Son, Woohyun Kim +2
The widely used global navigation satellite systems (GNSSs) are vulnerable to radio frequency interference (RFI). Long-range navigation (Loran), a terrestrial navigation system, ca…
Effects of Initial Attitude Estimation Errors on Loosely Coupled Smartphone GPS/IMU Integration System
Kwansik Park, Woohyun Kim, Jiwon Seo
Global Positioning System (GPS) and inertial measurement unit (IMU) sensors are commonly integrated using the extended Kalman filter (EKF), for achieving better navigation performa…
Development of Record and Management Software for GPS/Loran Measurements
Woohyun Kim, Pyo-Woong Son, Joon Hyo Rhee +1
In this paper, a software implementation that records Global Positioning System (GPS) and long-range navigation (Loran) measurement data output from an integrated GPS/Loran receive…
Motion Planning by Reinforcement Learning for an Unmanned Aerial Vehicle in Virtual Open Space with Static Obstacles
Sanghyun Kim, Jongmin Park, Jae-Kwan Yun +1
In this study, we applied reinforcement learning based on the proximal policy optimization algorithm to perform motion planning for an unmanned aerial vehicle (UAV) in an open spac…
Practical Simplified Indoor Multiwall Path-Loss Model
Taewon Kang, Jiwon Seo
Over the past few decades, attempts had been made to build a suitable channel prediction model to optimize radio transmission systems. It is particularly essential to predict the p…
Sample-Efficient Training of Robotic Guide Using Human Path Prediction Network
Hee-Seung Moon, Jiwon Seo
Training a robot that engages with people is challenging; it is expensive to directly involve people in the training process, which requires numerous data samples. This paper prese…
Dynamic Difficulty Adjustment via Fast User Adaptation
Hee-Seung Moon, Jiwon Seo
Dynamic difficulty adjustment (DDA) is a technology that adapts a game's challenge to match the player's skill. It is a key element in game development that provides continuous mot…