Performance Comparison of Anti-Spoofing Methods using Pseudorange Measurements

Cho, Sung-Lyong; Shin, Mi-Young; Lee, Sang-Jeong; Park, Chan-Sik

Journal of the Korea Institute of Military Science and Technology 2010;13(5):793-800.

Sung-Lyong Cho, Mi-Young Shin, Sang-Jeong Lee, Chan-Sik Park

¹Chungnam National University
²Chungbuk National University

의사거리 측정치를 이용하는 기만신호 검출 기법의 성능 비교

조성룡, 신미영, 이상정, 박찬식

¹충남대학교
²충북대학교

Abstract

GPS spoofing is an intentional interference which uses the mimic GPS signals to fake the receivers. The generic GPS receiver is hard to recognize the spoofing signal because the spoofer generates the fake signals as close as possible to the GPS signal. So the spoofer can do critical damage to public operations. This paper introduces a basic concept of spoofing and analyzes the effect of the spoofing signal to the GPS receiver. Also for stand-alone GPS receivers, two anti-spoofing methods are implemented : RAIM based method and the SQM based method. To evaluate the performance of anti-spoofing method, the software based spoofing signal generator and GPS signal generator are implemented. The performance of the anti-spoofing methods obtained using the output of the software based GPS receiver shows that SQM based method is more effective when multiple spoofing signals exist.

Key Words: GPS, Spoofing Signal, Anti-Spoofing Method, RAIM(Receiver Autonomous Integrity Monitoring), SQM(Signal Quality Monitoring)