Journal of Satellite, Information and Communications (한국위성정보통신학회논문지)

Korea Society of Satellite Technology (한국위성정보통신학회)
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New OFDM Schemes Robust to Doppler and PAR Effects for Satellite Communications

위성통신에서 도플러 및 PAR 효과에 강인한 새로운 OFDM 방식

  • 홍상완 (유한대학교 정보통신과) ;
  • 이병섭 (한국항공대학교 항공전자공학부)
  • Received : 2015.05.15
  • Accepted : 2015.06.27
  • Published : 2015.06.30
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Abstract

A new and effective Doppler effects compensation method based on constellation estimation as well as an average power saving strategy by modified modulation scheme utilizing zero point constellation are presented with theoretical analysis and relevant simulations. The suggested schemes are proved to be very effective for satellite OFDM signals relayed by power limiting transponder for the mobile terminal on high speed vehicles.

제로 포인트 콘스텔레이션(zero point constellation)을 이용하는 수정된 변조방식에 의해 평균 전력 절감 방법뿐만 아니라 콘스텔레이션 추정을 기반으로 하는 새롭고 효율적인 도플러 효과 보상 방법이 이론 해석과 적절한 시뮬레이션을 통해 제시된다. 제안된 방식은 고속 차량의 이동 단말에 대하여 전력을 제한하는 트랜스폰더(transponder)에 의해 중계되는 위성 OFDM 신호에 매우 효과적이다.

Keywords

References

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