• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.2
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• pp.445-451
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• 2014

Dual LED lantern, which is composed of two light sources in one lantern, can be utilized as an auxiliary light source when the main light source is in trouble. Nevertheless, there are no way to obtain status information of the system and control the light source if the current domestic standard protocol is applied, since the standards for dual LED lantern are not defined yet. Regarding to this problem, we suggested expanded lantern protocol for management system of dual LED lantern based on current domestic standard. Also, we confirmed the normal operation of dual LED lantern after implementing suggested protocol on the developed management system. Control system suggested and implemented in this study is tested not only its function of controlling and acquiring the operating status of dual LED lantern, but also its capability to utilize as a control system of currently used LED lanterns.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.136-138
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• 2018

해상에 설치된 등부표에 등화를 밝히기 위해서는 전력 생산장비와 전력 저장장치가 필요로 하는데 등대 및 등부표에 사용하는 등명기는 현재 태양전지와 축전지 및 광원인 등명기를 각기 별도 설치하여 운영하여 등대 관리에 많은 시간과 예산이 소요되는 단점이 있어 국제적으로 전원일체형 등명기를 사용하는 추세이다. 재생에너지를 이용해 안정적인 전원을 공급받으며, 연안 수역을 운항하는 선박이 항로표지를 쉽게 식별할 수 있고, 해양사고 발생 시 긴급 수색 및 구조시스템 외에 침몰선박의 위치를 알려주는 기술을 연구 개발하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.8
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• pp.1773-1779
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• 2015

Shore-to-sea visible light communication using color clustered multiple-input and multiple-output (MIMO) is presented. The proposed maritime visible light communication (MVLC) offers a low-cost, high-speed wireless link for shore-to-sea maritime communications. Each color cluster is comprised of 50 red, green and blue (RGB) light emitting diodes (LEDs) and is modulated using on-off-keying (OOK). Selection combining is performed at the receiver, producing diversity effect within that color cluster. In this paper, we employ sea states (wave height, wind speed, etc.) data from both Pierson-Moskowitz and JONSWAP spectrum models under atmospheric turbulence conditions. Based on the simulation model, the maritime link quality is analysed in terms of coverage distance and bit error rate performance. The results show that the proposed system provides an efficient MVLC, while satisfying International Association of Lighthouse Authorities (IALA) requirements for maritime buoyage system and also offering sufficient illumination from high power LEDs.