한국광학회지 (Korean Journal of Optics and Photonics)

  • 제30권6호
  • /
  • Pages.230-236
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  • 2019
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  • 1225-6285(pISSN)
  • /
  • 2287-321X(eISSN)
한국광학회 (Optical Society of Korea)
권호 표지
DOI QR코드

DOI QR Code

실내용 자유 공간 광 통신을 위한 수신단의 위치 탐색 및 자동 링크 정렬 방법

Searching and Autoalignment Method for Indoor Free-space Optical Communication

  • 이관용 (카이스트 전기 및 전자공학부) ;
  • 조승래 (LG 디지털 파크 High UHD Project) ;
  • 이창희 (카이스트 전기 및 전자공학부)
  • Lee, Kwanyong (LiDAR and Intelligent Optical Node (LION) Laboratory, Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Cho, Seung-Rae (LG Digital Park High UHD Project) ;
  • Lee, Chang-Hee (LiDAR and Intelligent Optical Node (LION) Laboratory, Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • 투고 : 2019.09.30
  • 심사 : 2019.11.07
  • 발행 : 2019.12.25
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초록

저렴한 retro-반사지와 미소 전자 기계 시스템(micro electro-mechanical system, MEMS) 거울을 이용한 실내용 무선 광 통신용 위치 탐색 및 자동 링크 정렬 방법을 제안하고 실험하였다. 직접적인 가시선(line of sight, LOS) 확보를 위하여 retro-반사지에서 돌아온 빛으로부터 수신단 위치를 파악하고 MEMS 거울을 통한 빔 조종으로 통신 링크를 자동 정렬하였다. 자동 정렬된 광 링크를 통하여 7 m 전송 거리에서 2.5 Gb/s NRZ 신호를 전송하여 비트 에러율 10-12에서 수신 감도 -31.87 dBm의 성능을 가졌다.

We propose and demonstrate a searching and autoalignment method for indoor optical wireless communication, using a cost-effective retroreflective sheet and a microelectromechanical system (MEMS) mirror. We use an extremum-seeking method for a single axis and beam steering with a MEMS mirror to maintain a line of sight (LOS) with the optical link. This autoalignment method shows a receiver sensitivity of -31.87 dBm for a bit rate of 2.5 Gb/s over a 7 m communication link.

키워드

참고문헌

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