Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Implementation of Deferred NAK Mode Simulator for Large-Volume Telemetry Data Transmission in Deep Space Communication Systems

심우주 통신 시스템에서 대용량 Telemetry 데이터 전송을 위한 Deferred NAK Mode 시뮬레이터 구현

  • 홍희진 (한양대학교 융합전자공학부) ;
  • 이주병 (한양대학교 융합전자공학부) ;
  • 윤동원 (한양대학교 융합전자공학부) ;
  • 현광민 (강릉원주대학교 정보통신공학과)
  • Received : 2010.07.02
  • Accepted : 2010.12.24
  • Published : 2010.12.25
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Abstract

As part of its space development program, Korea has a plan for the launch of a lunar orbiter and a lunar lander. To enable the transmission of lunar information based on multimedia, it is necessary to construct a communication system that is capable of transmitting large-volume telemetry data. The CCSDS standard recommends the deferred NAK mode as ARQ scheme for reliable long-distance deep-space communication systems. In this paper, we implement a space communication system simulator in the deferred NAK mode using models of the lunar orbiter, the earth station, and the space environment. The simulator employs modulation techniques and turbo coding schemes for transmitting large-volume telemetry data. We analyze the transmission performance of telemetry data through the simulation.

우리나라는 우주 개발의 일환으로 달 탐사를 위한 달 탐사선과 달 착륙선의 발사를 계획하고 있다. 향후 멀티미디어 기반의 달 탐사 정보를 전송하기 위해서는 대용량 Telemetry 데이터를 전송하기 위한 통신 시스템을 구축하는 것이 필요하다. CCSDS 표준에서는 신뢰성 있는 원거리 심우주 통신 시스템을 위한 ARQ 기법으로 Deferred NAK mode를 권고하고 있다. 본 논문에서는 달 탐사선과 지상국 및 우주 환경 모델을 반영하여 Deferred NAK mode 통신 시스템 시뮬레이터를 구현하며, 시뮬레이터에는 대용량 Telemetry 데이터를 전송하기에 적합한 변조 방식과 터보 부호화 기법을 사용한다. 시뮬레이션을 통해 Telemetry 데이터의 전송 성능을 분석한다.

Keywords

References

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