Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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Performance Analysis of L-band Digital Aeronautical Communication Systems

L-대역 디지털 항공 통신 시스템의 수신 성능 분석

  • Cheon, Jeong-Hyeon (School of Electronics and Information Engineering, Korea Aerospace University) ;
  • Yoon, Kyung-Han (School of Electronics and Information Engineering, Korea Aerospace University) ;
  • Jang, Soo-Hyun (School of Electronics and Information Engineering, Korea Aerospace University) ;
  • Jung, Yun-Ho (School of Electronics and Information Engineering, Korea Aerospace University)
  • 천정현 (한국항공대학교 항공전자공학과) ;
  • 윤경한 (한국항공대학교 항공전자공학과) ;
  • 장수현 (한국항공대학교 항공전자공학과) ;
  • 정윤호 (한국항공대학교 항공전자공학과)
  • Received : 2015.04.11
  • Accepted : 2015.04.21
  • Published : 2015.04.30
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Abstract

Due to the increase in the data traffic for the aeronautical communications, LDACS has been proposed to support the data link in the continental domain. LDACS is defined in two standards of LDACS type-1 and LDACS type-2, which are going to be selected through the intensive comparison. In this paper, we analyzed two types of standards and evaluated their performance for various channel models. Simulation results show that both LDACS type-1 and LDACS type-2 have a good performance in the en-route channel model, while they have a poor performance in the airport channel model. In the comparison results for LDACS type-1 and LDACS type-2, LDACS type-1 shows the better performance of 1dB than LDACS type-2 owing to the stronger channel coding technique.

최근 항공 통신의 데이터 트래픽 증가로 인하여, 대륙 간 항공통신을 위한 L-band 대역 디지털 통신시스템인 LDACS가 제안되었다. LDACS 모델은 LDACS type-1과 LDACS type-2의 두 가지 규격으로 정의 되었으며, 향후 면밀한 검토를 바탕으로 한 가지 시스템을 선정하여 운용하기로 하였다. 이에 본 논문에서는 두 LDACS 시스템의 규격 분석과 함께 채널 환경에 따른 수신 성능을 비교 및 평가함으로써 항공 통신 시스템에의 적용 가능성을 분석하였다. 분석결과, 두 시스템 모두 airport 채널 환경에서 큰 성능 열화를 보였으나 LOS 환경의 en-route 채널의 경우에 우수한 성능을 보임을 확인할 수 있었다. 또한, en-route 환경에서 LDACS type-1과 LDACS type-2의 비교 분석 결과, LDACS type-2 대비 LDACS type-1의 수신 성능이 $10^{-3}$ BER 기준 1 dB 우수함을 확인할 수 있었으며, 이는 보다 강력한 채널 부호가 적용되었기 때문으로 판단된다.

Keywords

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