선박에 적합한 저비용 GPS 항재밍 방안 연구 (Study on Low-Cost GPS Anti-Jamming Solutions Suitable for Vessels)

서지정보

· 발행기관 : 한국전자파학회
· 수록지 정보 : 한국전자파학회 논문지 / 36권 / 2호 / 128 ~ 134페이지
· 저자명 : 김재현, 김현봉, 이하준

초록

본논문은선박에적합한저비용GPS 항재밍방안을제안한다. 국내의GPS 교란신호는북방한계선(NLL) 인근에서남쪽을향하는GPS 전파교란공격이라는점과해상환경에서는선박의롤링과피칭등으로인해GPS 신호수신특성에영향을받을수있는특징이있다. 이에본연구는고비용항재밍GPS를대체할수있는GPS 항재밍형상설계와선체감쇄 특성을활용한항재밍방안을제시하였다. 형상에대한무반사성능측정결과, 약29.42 dB의 신호 감쇄 효과를확인하였다. 선체감쇄특성을활용하면감쇄효과는더욱증가할수있다. 위성탐색수는12∼14개로위성항재밍쉴드형상이위성획득에부정적인영향을미치지않음을확인하였다. 상용항재밍안테나에비해차폐성능은다소낮지만, 저비용알루미늄함체설계와구조최적화를통해비용효율성을극대화하였다. 실제여객선을대상으로한시험운용에서는해당선사의견을통해선박자동항법시스템(e-Nav.) 및GPS 플로터(Plotter) 비교환경에서항재밍효과를확인하였다.

영어초록

This study proposed a cost-effective global positioning system (GPS) anti-jamming solution suitable for vessels. Domestic GPS inter ference signals are characterized by jamming attacks originating near the northern limit line (NLL) and are directed southward. In addi tion, the maritime environment is influenced by factors such as ship rolling and pitching, which can affect GPS signal reception. To address these challenges, this paper presents a GPS anti-jamming design that utilizes shield configurations and hull attenuation properties as alternatives to high-cost anti-jamming GPS systems. The measurement results for the nonreflective performance of the shield config uration showed a signal attenuation effect of approximately 29.42 dB. The attenuation effect could be further enhanced by exploiting the attenuation characteristics of the hull. The number of visible satellites was maintained at 12∼14, confirming that the satellite shield configuration did not negatively affect satellite acquisition. Although the shielding performance was slightly lower than that of commer cial anti-jamming antennas, the cost efficiency was maximized by using low-cost aluminum enclosures and structural optimization. Field trials conducted on a passenger vessel verified the anti-jamming effectiveness through a comparative analysis using the e-navigation system (e-Nav.) of the ship and GPS plotter. Feedback from the shipping company further supported the practical applicability of the proposed solution.

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