Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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The Analysis on the Interference Effects from GSO Satellites into HAPS Ground station

GSO 위성으로부터 HAPS 지상국에 미치는 간섭 영향 분석

  • Published : 2004.06.01
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Abstract

The bands 27.5 ∼ 28.35GHz and 31.0 ∼ 31.3GHz were allocated to the High Altitude Platform Station in WRC-2000. However, since these bands were already allocated to the existing fixed-satellite service, the analysis on the interference effects between the existing FSS/GSO system and FS/HAPS system should be needed. To do study on the interference effects between above two systems, we can consider two frequency operational conditions, one is the Reverse mode and the other Forward mode. In this paper, we considered the Forward mode as the frequency operational condition and analyzed the interference effect from a number of GSO satellites to HAPS ground station due to the I/N values, the latitude of HAPS and the satellite separation. In future, these results will be vital data to share between HAPS and GSO systems.

기존의 고정 위성 서비스(FSS: fixed satellite service)에 할당된 27.5 ∼ 28.35GHz 대역 및 31.0 ∼ 31.3GHz 대역이 WRC-2000에서 성층권 무선 중계 시스템에 할당됨에 따라 FSS/GSO 시스템과 FS/HAPS 시스템간의 간섭 영향 분석이 필요하다. 이러한 간섭 분석에 있어서는 주파수 운용 조건을 크게 Reverse mode와 Forward mode로 구분하여 간섭 분석 모델을 설정해야 한다. 이에 본 논문에서는 FSS/GSO 시스템과 FS/HAPS 시스템간의 간섭 영향을 Forward mode를 고려하여 다수의 GSO 위성들에 의한 HAPS 지상국에 미치는 간섭 영향으로서 I/N 기준 값, HAPS 커버리지 위도, 위성 간격 등에 따른 간섭 평가를 행하였다. 한편, 이러한 간섭의 영향을 줄이기 위해서는 주파수 운용 조건을 Reverse mode로 고려하거나 적절한 간섭 경감 기법을 도입해야 할 것으로 보인다.

Keywords

References

  1. B.S. Kim, J.M. Park, B.J. Ku, Y.H. Kang and D.S. Ahn, Analysis on the interference effects into the radio-relay station from the HAPS system , CIC 2001, Seoul, Korea, Oct. 30 - Nov. 2, 2001
  2. Masayuki OODO, Ryu MIURA, A study of frequency sharing and contribution to ITU for wireless communication systems using stratospheric platforms , Journal of the Communications Research Laboratory, VoL48 No.4, 2001
  3. Doc.4-9S/219-E, Interference from the down-link of the fixed service using high altitude platform stations to the uplink oh the fixed-satellite service in the band 27.5GHz ~ 28.35GHz, 28 March, 2002
  4. Rec. ITU-R F.1245-1, Mathematical model of average and related radiation patterns for link-of-sight point-to-point radio-relay system antennas for use in certain coordination studies and interference assessment in the frequency range fromIGHz to about 70GHz
  5. Rec. ITU-R F.1107, Probabilistic analysis for calculating interference into the fixed service from satellites occupying the geostationary orbit
  6. 박종민, 구본준, 안도섭, 김봉석, 강영흥, 주파수 공유를 위한 HAPS 시스템이 무선 중계국에 미치는 간섭 영향 분석 , 한국통신학회논문지, 제 27권 제 7B호, pp. 719 ~ 725, 2002년 7월