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        2018 IPNT Conference Proceedings | 
    
    
     
        
        
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            2018 IPNT Proceedings Contents      IPNT          | 
    
    
     
        
        
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            Analysis of the Performance Degradation on the GPS Interference Rejection by the Array Antenna Miniaturization      Yun Cheol Cho, Chang Seok You, Jun O Kim*          | 
    
    
     
        
        
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            Design Factor Analysis of the Optimal Adaptive Beamforming Algorithm for GPS Anti-Jamming Receiver Systems      Dong-Hoon Jang, Jong-Hoon Won          | 
    
    
     
        
        
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            A Study on the Measuring Method of Arrival Angle for the Case where the Element Interval of the Array Antenna Exceeds th…      Seungwoo Seo*, Youngbum Park, Kiwon Song          | 
    
    
     
        
        
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            Wavelet Transform Based Interference Detection Method Without Blind Band      Seokjun Hong, Jinmo-Yang, Chansik Park, Bo-Seok Seo*          | 
    
    
     
        
        
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            Positioning Performance Enhancement of GNSS Receiver Between AJ Mode      Joon-Sung Bae, Nam-Eung Hwang*, Jun-O Kim          | 
    
    
     
        
        
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            Direct Correlation Method for Weak Jamming Signal Sources Monitoring      Hyeong-Pil Kim, Jung Hoon Lee, Jong-Hoon Won*          | 
    
    
     
        
        
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            The Impact of Non-MEO GNSS Satellite for the Longitude of Geostationary Orbit      Heon Shin, Ki-Ho Kwon, Jong-Hoon Won*          | 
    
    
     
        
        
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            An Unusual Phenomenon in the GNSS Receiver During Ground-Firing Tests of the Test Launch Vehicle      Byung-Moon Kwon*, Yong-Sul Shin, Keun-Soo Ma          | 
    
    
     
        
        
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            A Location Monitoring System Based on Multi-Information Integration for Supporting Compound Disasters Accident      Kyon-Mo Yang*, Seungsub Oh, Kap-Ho Seo, Jongil Lee, Seokjae Lee, Jinho Suh          | 
    
    
     
        
        
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            Research and Development for the Improvement of Chip-Scale Atomic Clock Frequency Control Performance      Tae-Gyun Kim*, Tae-Hyun Jun, Sang-Jun Yun, Hyun-Gue Hong, Jong-Cheol Park          | 
    
    
     
        
        
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            GPS C1P1 DCB Estimation and Application to GPS L1 Receiver      Sung-Chin Bu*, Chul-Soo Lee, Do-Kyung Kim, Yo-Han Ko, Kap-Jin Kim, Hyoungmin So          | 
    
    
     
        
        
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            Performance Improvement of the Three-dimensional Antenna Array System Considering the Antenna Distortion      Jun O Kim, Jae Gil Kim, Sang Jeong Lee*          | 
    
    
     
        
        
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            Performance Evaluation of GPS Positioning Using SDCM Correction Information      Mingyou Cho, Jekil Kim, JaeGun Choi, Youn-Chul Cho*          | 
    
    
     
        
        
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            Performance Analysis of GNSS based Precise Positioning Transportation Infrastructure User System Using Evaluation Tool      Jung-Hoon Lee*, Sang-Woo Lee, Jongsun Ahn, Yunseong Choi, Moon-Beom Heo          | 
    
    
     
        
        
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            Performance Analysis Method for NETPPI-LT Cluster Using Based on CORS      Miri Shin, Jongsun Ahn, Eunseong Son, Joon-Min Choi, Moon-Beom Heo*          | 
    
    
     
        
        
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            Analysis of Detailed GPS Radio Environment Survey for KASS Reference Station      Minhyuk Son, Jea-Eun Lee, Hyun-jin Jang, Sung-Lyong Cho, Jong-Yeoun Choi, Gi-Wook Nam          | 
    
    
     
        
        
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            Integrated HIL Simulation Environment for Autonomous Driving Algorithm Development      Sang-Hun Ahn, Kyu-Jin Choi , Jong-Hoon Won*          | 
    
    
     
        
        
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            A Result of Time Difference Estimation Between Loran-C Chains Using TOA Measurements      Youngki Kim*, Kiyeol Seo, Sanghyun Park, Tae Hyun Fang, Don Kim          | 
    
    
     
        
        
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            Study on Ranging Code Design Based on Weil Code      Deok Won Lim*, Sebum Chun, Moon Beom Heo          | 
    
    
     
        
        
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            GNSS Ionospheric TEC Disturbances Induced by the 2017 North Korean’s Missile      Byung-Kyu Choi*, Junseok Hong, Kyoung-Min Roh          | 
    
    
     
        
        
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            The NRT-CIT Model with Empirical Orthonormal Functions using Korea GNSS Network      Junseok Hong*, Jong-Kyun Chung, Yong Ha Kim, Nicholas Ssessanga          | 
    
    
     
        
        
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            A New Method for Estimating Ionospheric Delay Against Thin Shell Model      Bong-Kwan Choi, Deok-Hwa Han, Hwi-Gyeom Kim, Chang-Don Kee          | 
    
    
     
        
        
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            The Method on Determination of Ionospheric Scale Factor for Low Earth Orbit Satellites by Using a NeQuick G Model      Mingyu Kim, Jaewook Myung, Jeongrae Kim*          | 
    
    
     
        
        
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            A Study on Improving Ionosphere Modeling Accuracy Using Double-difference Carrier Phase      Deokhwa Han, Donguk Kim, Changdon Kee*, Seung-woo Seo, Hyoungmin So, Jae Gyu Jang, Junpyo Park, Kiwon Song          | 
    
    
     
        
        
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            Method to Determine if There Exists Magnetic Noise in Geological Mapping by Using Three Component Magnetic Field Measuri…      Mutaek Lim*, Youngsue Park, Younsoo Lee, Younghong Shin, Hyoungrae Rim, Kanghyeun Ji, Taehwan Jeon          | 
    
    
     
        
        
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            Changes of Crustal Strain-rate of Korean Peninsula in Recent 15 Years      Dong-Hyo Sohn*, Sun-Cheon Park, Won-Jin Lee, Duk Kee Lee          | 
    
    
     
        
        
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            Analysis of the Pohang Earthquake on 15 November 2017 using GNSS      Hasu Yoon*, Byung-Kyu Choi, Jung Ho Cho, Yun Soo Choi          | 
    
    
     
        
        
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            Concept Design for User Integrity Algorithm of GNSS NEPPI-LT      Jongsun Ahn*, Sung-hyuck Im, Jongmin Joo, Moon-Beom Heo          | 
    
    
     
        
        
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            Performance Analysis of Single Frequency RTK Positioning for Development of Autonomous Agricultural Vehicle      Joong-hee Han*, Chi ho Park, Jin Ok Choi          | 
    
    
     
        
        
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            Development of GPS/GLONASS Compact Network RTK Demonstration System      Dong-Uk Kim, June-Sol Song, Daniel Hong, Yong-Hwan Bae, Byung-Woon Park, Chang-Don Kee*          | 
    
    
     
        
        
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            Real-time VRS-RTK Implementation and Performance Evaluation Using the Raw Data From an Android Smartphone      Jong-Seok Kim, Joon-Seong Gim, Kwan-Dong Park*          | 
    
    
     
        
        
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            Performance analysis of Satellite-Based Ionosphere Model for Extending the Coverage of Differential GNSS      Hyoungmin So*, Jaegyu Jang, Kihoon Lee, Kiwon Song, Junpyo Park          | 
    
    
     
        
        
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            Military Search and Rescue System Considering Korea Satellite Navigation System      Sanguk Lee*, Sun Woo Kim, Woo-Geun Ahn          | 
    
    
     
        
        
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            Scale Factor Nonlinearity Calibration of MEMS Accelerometer by Using Multi Position Test      Jeong-Geun Hong*, Jeong-Tae Bae, Jeong-Won Kim, Kwang-Jin Kim          | 
    
    
     
        
        
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            Comparative Analysis of Temperature Calibration for MEMS Based IMU      Bae Jeong Tae, Hong Jeong Geun, Kim Jeong Won, Kim Kwang Jin          | 
    
    
     
        
        
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            A Study on the Improvement of Positioning Accuracy in Urban Environment Using Road Azimuth      Yeong-Guk Kim, Kwan-Dong Park          | 
    
    
     
        
        
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            Deep Learning Based Multipath Mitigation Method for Carrier-Based UAS Landing System      Dongchan Min, Mincha…          | 
    
    
     
        
        
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            Research and Development of an Anti-Jamming Integrated EGI Navigation System for Aviation      Sang-Yoon Lee*, Hyoung-Yuk Kim, Il-Young Jeong, Sang-Jun Yun          | 
    
    
     
        
        
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            Performance Enhancement of the INS/EM-Log Based Underwater Navigation      Seong Yun Cho*, Hojin Ju, Jaehyuck Cha, Chan Gook Park, Kijeong Yoo, Chanju Park          | 
    
    
     
        
        
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            A Development of Differential Loran System Technique for Improving eLoran Positioning Accuracy of Maritime Users in Sout…      Younghoon Han, Young-Ki Kim, Sul-Gee Park, Sangheon Lee, Pyo-Woong Son, Ki-Yeol Seo*          | 
    
    
     
        
        
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            Analysis on Core Technologies for MF Beacon R-Mode      Sang Hyun Park, Young Hoon Han, Kiyeol Seo, Tae Hyun Fang, Gi Jun Jeon          | 
    
    
     
        
        
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            An Analysis of Marine PNT Technologies for Backup to GPS Interference      Sangheon Lee, Younghoon Han, Sanghyun Park, Ki Yeol Seo, Tae Hyun Fang*          | 
    
    
     
        
        
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            Analysis of Android Based GPS Performance for Maritime Positioning      Sul Gee Park*, Sang Hyun Park          | 
    
    
     
        
        
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            GNSS Supplementation using Molniya Satellites      SangHoon Koo, Moonseok Choi, Hong Pyo Kim, Junpyo Park, Sangkyung Sung, Young Jae Lee*          | 
    
    
     
        
        
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            A Study on GPS Navigation Message Logged in RINEX Format      Kwang Ho Choi, Won Jae Yoo, La Woo Kim, Yu Dam Lee, Hyung Keun Lee*          | 
    
    
     
        
        
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            Development of Gas Pipe Settlement Monitoring System Using the Rate of Change of Carrier Phase Double Difference      Ye-Bin Lee, Cheol-Soon Lim, Dong-Hyun Shin, Hyo-Jung Yoon, Young-Jun Lee, Byung-Woon Park*          | 
    
    
     
        
        
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            Performance Evaluation Algorithm of M&S S/W based Multi-Radio Integrated Navigation System      Heyone Kim, Jae Hoon Son, Junhak Lee, Sang Heon Oh, Hyoungmin So, Dong-Hwan Hwang*          | 
    
    
     
        
        
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            Design of a DoA Sensor Network to Mitigate the Effects of Conical Ambiguity in ULA-Based Signal Source Localization      Hyoungsoo Lim*, Kwangjae Lim, Cheon Sig Sin          | 
    
    
     
        
        
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            Non Line of Sight (NLOS) Environment Determination Using Artificial Intelligence (AI) and Positioning Algorithm Performa…      Bo Seong Kim, Tae Seon Kim, Sang Jae Cho, Seung-Hyun Kong*          | 
    
    
     
        
        
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            SMC-CPHD Filter for Localization of Multiple Interference Source      Sun Young Kim, Chang Ho Kang, Chan Gook Park*, Jung Min Joo, Ki Hoon Lee          | 
    
    
     
        
        
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            Accuracy Comparison of GPT and SBAS Models for Tropospheric Correction in GNSS-based Positioning      Hae-Chang Lee*, Kwan-Dong Park          | 
    
    
     
        
        
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            Antenna Arrangement for Improved Ambiguity Resolution Performance of Single-station-based Positioning System      O-Jong Kim, Changdon Kee*          | 
    
    
     
        
        
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            Performance of DoA Estimation in Presence of Mutual Coupling      Jung-Bin Kim*, Cheon Sig Sin          | 
    
    
     
        
        
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            Multiple Target Tracking Method Based on Adaptive Particle Flow Filter      Sun Young Kim, Chang Ho Kang, Chan Gook Park*          | 
    
    
     
        
        
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            Analysis of the Feasibility of GPS/Cellular Integrated Navigation in Urban Area      Hyo-Jeong Seok*, Bosung Lee          | 
    
    
     
        
        
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            A Study on Estimation of a Vehicle Speed Using Transmission Characteristic of Ultrasonic Sensor      Bu Sung Choi, Kwang Ho Choi, Won Jae Yoo, La Woo Kim, Yu Dam Lee, Hyung Keun Lee*          | 
    
    
     
        
        
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            GUI Design of a M&S Software for a Multi-radio Integrated Navigation System      Jae Hoon Son, Heyone Kim, Junhak Lee, Sang Heon Oh, Hyoungmin So, Dong-Hwan Hwang*          | 
    
    
     
        
        
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            Integrated Navigation Algorithm using GPS and Radar      Gwang Hee Jo, Jin Hyuk Lee, Jae Hee Noh, Ju Hyun Lee, Sang Jeong Lee*          | 
    
    
     
        
        
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            Performance Analysis of Object Position Estimation Using Camera, GNSS Receiver and Radar      Jae Hee Noh, Ju Hyun Lee, Gwang Hee Jo, Jin Hyuk Lee, Sang Jeong Lee*          | 
    
    
     
        
        
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            Implementation of Loosely Coupled GNSS/INS/DR Integration Using Commercial MEMS IMU for Ground Vehicle Navigation      Jin-su Han, Jong-Hoon Won*          | 
    
    
     
        
        
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            Design and Implementation of Wearable Sensor Based Sports Data Acquisition System Using 9 Axis Fusion Sensor Technology      Sung-Hun Lim*, Won-Ro Lee, Do-Won Nam, Jung-Soo Lee          | 
    
    
     
        
        
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            Implementation of Integrated Navigation Algorithm Based on GNSS-VTL and INS      Gun-Hoon Ji, Jong-Hoon Won*          | 
    
    
     
        
        
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            Study on MEMS Sensor Bias Calibration Method Application by Using GNSS Raw Measurements of Smart Device      Dong-hyun Shin, Byun…          | 
    
    
     
        
        
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            Minimum Detectable Error Analysis of Satellite Orbit Fault Detection Algorithm Using ISL and Triangle Law      JinHyeok Jang, JungMin Joo, MoonBeom Heo, SangKyung Sung, Young Jae Lee*          | 
    
    
     
        
        
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            Risk-Based Integrity Parameter Inflation Technique for Mitigating GAST D GBAS Ionospheric Threat      Moonseok Yoon*, Jiyun Lee          | 
    
    
     
        
        
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            Considerations on Human Factors in CNS/ATM Systems      Baeckjun Yi*, Byung Seok Lee, Young Min Yoon, Youn-Jeong Heo, Gi Wook Nam          | 
    
    
     
        
        
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            Analysis of Ionospheric Scintillation Effects on GBAS Ground Integrity Monitors      Kiyoung Sun, Moonseok Yoon, Jiyun Lee*          | 
    
    
     
        
        
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            Availability Analysis of RAIM/ARAIM Users in Korean Region      Jung-Beom Kim, Deok-Hwa Han, Dong-Uk Kim, Bong-Kwan Choi, Chang-Don Kee*          | 
    
    
     
        
        
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            Performance Analysis on MSAS Satellite Orbit and Clock Corrections using Precise Orbit and Clock Products      Cheol-Soon Lim, Byung-Woon Park*          | 
    
    
     
        
        
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            A Study on Radio Interference Mitigation Schemes for KASS Uplink Station Site      Cheon Sig Sin*, Jong-Moon Lee, Inbok, Yom          | 
    
    
     
        
        
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            Implementation and Verification of eLoran Receiving System Using M&S      Young-Su Kim, Young-Baek Kim, Jeong-Been Kim          | 
    
    
     
        
        
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            Performance Evaluation of Carrier Phase Coasting under SBAS Signal Disconnection      Pil Hun Choi, Minchan Kim, Chul-Soo Lee, Sung-Chun Bu, Gihun Lee, Jiyun Lee*          | 
    
    
     
        
        
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            A Study on the Utilization of GPS Triple Frequency for Network RTK Stations Ambiguity Resolution      SunKyoung Yu, Dong-uk Kim, Junesol Song, Changdon Kee*          | 
    
    
     
        
        
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            Application and Validation of SBAS Messages in PPP-RTK      Miso Kim*, Yeong-Guk Kim, Kwan-Dong Park          | 
    
    
     
        
        
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            Performance Analysis of New Satellite Utilization Based on SBAS Error Budget      Kihoon Lee*, Hyungmin So, Jangyong Lee, Junpyo Park          | 
    
    
     
        
        
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            Navigation System Based on Combining HD map and 3D Point-Cloud Map for Autonomous Vehicle      Chung-Jae Choe, Minjun Kim, Giho Sung, Youngbo Shim, Seung-Hyun Kong*          | 
    
    
     
        
        
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            Vehicle Localization Using Road Marking Image Matching      Yeong-Dong Choi, Gyu-In Jee*          | 
    
    
     
        
        
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            Precise Vehicle Localization using Binary Road-marking Map      Kyu-Won Kim, Gyu-In Jee          | 
    
    
     
        
        
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            3D LIDAR Based Vehicle Localization Using Extended Line Map      Jun-Hyuck Im, Gyu-In Jee*          | 
    
    
     
        
        
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            Precise Map Lane Segmentation and Vehicle Localization using Road Sign      Tae-Ki Jung, Gyu-In Jee*          | 
    
    
     
        
        
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            Real-Time Lane Detection and Tracking using Kinematics of Unmanned Self-Driving Car for Localization on the Road      Byung-Kwan Lee, Youn…          | 
    
    
     
        
        
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            Development of the Lateral and Longitudinal Control Logic Based on Dynamic Model for Autonomous Vehicles and its Verific…      Kyu-Jin Choi, Hyun-K…          | 
    
    
     
        
        
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            Sensor Modeling in Driving Simulation Environment for Self-Driving Car Algorithm Development      Ji-Ung Im, Jong-Hoon Won*          | 
    
    
     
        
        
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            Effectiveness of Self-Calibrated Visual-Inertial Odometry Using a Rolling Shutter Camera      Jae Hyung Jung, Sejong Heo, Chan Gook Park*          | 
    
    
     
        
        
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            Study of Floor Recognition Method Based on SSPRT and ANN      Sebum Chun, Jahee Seo, Moon-beom Heo          | 
    
    
     
        
        
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            A Surface Correlation Based Indoor Precise Localization System with Very Few RF Transmitters      Jung Ho Lee, Beomju …          | 
    
    
     
        
        
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            A Study of Indoor Positioning Based on Artificial Neural Network (ANN) with Restricted Number of Anchors      Jae-Hee Seo*, Sebum Chun, Moon-Beom Heo          | 
    
    
     
        
        
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            Performance Assessment of Server Based Indoor Positioning Prototype Using Wi-Fi Monitoring Access Point      Young-Su Cho*, Myung-In Ji, Dae-Hee Kim, Sung-Yong Kim          | 
    
    
     
        
        
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            Localization Technology of Vehicle in Tunnel Using Mobile Phone      Beomju Shin, Bosun Yoo, Changdon Kee, Taikjin Lee*          | 
    
    
     
        
        
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            Acceleration Estimation Using Angular Velocity and Kinematic Constraints      Jungmin Park, So Young Park, Chan Gook Park*          | 
    
    
     
        
        
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            Comparison of Step Length Estimation Models of Pedestrian Navigation System Using Waist-Worn Inertial Sensor      Daehyun Kim, Hojin Ju, Chan Gook Park*          | 
    
    
     
        
        
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            System Development to Provide a Same GNSS Environment to the Various Receivers in Order to Compare their Performance      Hyo-Jung Yoon, Byung-Woon Park*, Cheol-Soon Lim1, Dong-Hyun Shin, Young-Jun Lee, Ye-Bin Lee, Jung-Hyun Yoon, Am Cho, Chang-Sun Yoo          | 
    
    
     
        
        
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            Analysis of System Testable Area according to Arrangement of Transmitters in Ground Test-bed Environment of Navigation S…      Hyeong-Pil Kim, Jong-Hoon Won*          | 
    
    
     
        
        
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            Analysis of Spoofing Signal Impact on GPS Receiver in GPS Observation Station      Taehee Kim*, CheonSig Sin          | 
    
    
     
        
        
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            A Signal Processing Method Using the MUSIC Algorithm to Estimate AOAs of Jammers for a Misaligned Antenna Array      Kwansik Park, Dongkook Lee, Jiwon Seo*          | 
    
    
     
        
        
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            Analysis of Spoofing Results in GPS Receiver Using Machine Learning      Beomju Shin, Minhuck Park, Hyoung min So, Gap jin Kim, Changdon Kee*          | 
    
    
     
        
        
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            Design of Spoofing Effectiveness Analysis Simulator for UAV      Byung-Hyun Lee*, Sung-Il Kim, In-Geun Oh, Ki-Chun Yun          | 
    
    
     
        
        
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            Performance Bounds of CUSUM Based Jammer Geolocation      Jeongae Choi, Chansik Park, Jinmo Yang, Sunwoo Kim*          | 
    
    
     
        
        
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            The Design of Calibration Method for Rapid Calibration of Anti-jamming GNSS Equipment with Array Antenna      Nam Eung Hwang, Jae Gun Choi, Joon Sung Bae*          | 
    
    
     
        
        
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            Statistical Characteristics of Signal Quality Monitoring Metrics Based on Non-Coherent GPS Signal Tracking Loop      Yeongkwon Choe, Chang Ho Kang, Sun Young Kim, Chan Gook Park*, Moon Beom Heo, Young Bum Park          | 
    
    
     
        
        
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            Inone Joo*, Cheonsig Sin      A Method of Estimating Received CW Jamming Power Based on GPS L1 C/No          | 
    
    
     
        
        
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            Multiple Antennas-based Test Statistics Generation Method for Spoofing Signal Identification      Seong-Hun Seo*, Gyu-In Jee, Kwan-Sung Kim          | 
    
    
     
        
        
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            A Study of Real-time Wide-band Spectrum Sensing for Jamming Detection      Kwi Woo Park, Sunwoo Kim, Jin-Mo Yang, Chansik Park*          | 
    
    
     
        
        
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            Performance Analysis of the 2nd Generation COSPAS-SARSAT with Korea Positioning System      Jumg-Hoon Lee, Incheol Jeong, Jong-Hoon Won          | 
    
    
     
        
        
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            On the Insertion of a Watermark in Spreading Codes      Min Kyu Song*, Hong-Yeop Song, Jang Yong Lee          | 
    
    
     
        
        
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            Development of Analytical Simulator for GNSS Signal Design      Kahee Han, Jong-Hoon Won*          | 
    
    
     
        
        
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            Signal Modulation Techniques and Performance Analysis for Next Generation GNSS      Heon Shin*, Jong-Hoon Won          | 
    
    
     
        
        
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            Analysis of Multipath Error Reduction in a Deep Urban Environment Using Time Rate of Change of Code-Pseudorange Measurem…      Woong-Jun Yoon*, Kwan-Dong Park          | 
    
    
     
        
        
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            GPU-based Improved Real-time GNSS SDR Receiving Performance Analyze for Vehicle Navigation      Jong-Il Park, Kwi Woo Park, Jin-Mo Yang, Chansik Park*          | 
    
    
     
        
        
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            Decision of Maximum Pre-Integration Time According to Doppler Tracking Error for Weak Signal Tracking      Min-Huck Park, Sang-Hoon Jeon, Chang-Don Kee*          | 
    
    
     
        
        
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            A Study on Correlation Technique Based on Preambles Utilizing USRP and GNU Radio      Won Jae Yoo, Kwang Ho Choi, La Woo Kim, Yu Dam Lee, Hyoungmin So, Hyung Keun Lee          | 
    
    
     
        
        
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            Design of Relative Navigation Performance Improvement Algorithm for Link-K Tactical Data Link Terminal      Hyo-Ki Choi*, Chang-bae Yoon          | 
    
    
     
        
        
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            A Study of Enhanced Positioning with an RF Rescue Signal Through COSPAS SARSAT Satellite Relay      Incheol Jeong, Sanguk Lee, Cheonsig Sin, Woo-Geun Ahn          | 
    
    
     
        
        
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            Mitigation of the Multipath Error in Urban Canyon and Accuracy Improvement using Ground Control Point (GCP)      Yong Jun Lee, Byung Woon Park*, Cheol Soon Lim, Dong Hyun Shin, Hyo Jung Yoon, Ye Bin Lee, Yu Ra Hwang, Ji Hun Cha, Jae Yeong An          | 
    
    
     
        
        
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            Implementation and Performance Analysis of A-GNSS MS Assisted Mode Multi-Constellation      Sang Jae Cho, Tae Seon Kim, Bo Seong Kim, Jong Won Kim, Seung-Hyun Kong*          | 
    
    
     
        
        
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            Study of Satellite Constellation Design for Global Navigation Satellite System Using 2-D Lattice Flower Constellation Pa…      Sanghyun Lee*, Younggun Lee          | 
    
    
     
        
        
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            Multi-constellation Local-Area Differential GNSS for Unmanned Explorations in the Polar Regions      Dongwoo Kim, Min Chan Kim, Jinsil Lee, Jiyun Lee*          | 
    
    
     
        
        
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            Performance Analysis of Acquisition and Tracking for GNSS L1 Signals Based on SDR      Hee-Jae Jang*, Deok Won Lim, Sebum Chun, Moon Beom Heo          | 
    
    
     
        
        
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            Satellite Selection Method According to Signal Levels of Multi Constellation GNSS      HongPyo Kim, SangHoon Koo, JinHyeok Jang, Jun-Pyo Park, Young Jae Lee*          |