The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지

Analysis on the Effects of Interference from HAPS Ground Stations to P-MP FWA System

HAPS 지상국에서 P-MP FWA 시스템으로의 간섭 영향 분석

  • Ham Hyung-Il (School of Electrical & Information Engineering, Kunsan National University) ;
  • Kang Young-Heung (School of Electrical & Information Engineering, Kunsan National University)
  • 함형일 (군산대학교 전자정보공학부) ;
  • 강영흥 (군산대학교 전자정보공학부)
  • Published : 2006.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we have analyzed the effects of interference from HAPS ground stations to P-MP FWA base station and to P-MP FWA terminal station using more detail parameters such as a new interference model, a realistic HAPS scenario, practical antenna patterns for both the HAPS system and FWA systems. The analysis results show that, in the case of interference from HAPS GSs into a P-MP BS, compatibility of the two systems can be obtained by using a sectored BS antenna with the boresight directed away from the nadir. However, in the case of interference from HAPS GSs into a P-MP TS, the two systems cannot operate effectively in the same band unless the separation distance is guranteed and/or some form of interference mitigation technique is employed such as dynamic channel allocation.

본 논문에서는 새로운 간섭 모델, 실제적인 HAPS(High Altitude Platform Station) 간섭 시나리오, HAPS 시스템과 FWA(Fixed Wireless Access) 시스템에 대한 안테나 패턴, 송신 전력 등과 같은 파라미터들을 이용하여 HAPS 시스템의 지상국(GS: Ground Station)으로부터 P-MP(Point-to-Multipoint) FWA 기지국(BS: Base Station)로의 간섭 및 HAPS 시스템의 GS로부터 FWA 단말국(TS: Terminal Station)으로의 간섭 영향에 대하여 분석하였다. 분석 결과를 보게 되면, HAPS GS로부터 P-MP FWA BS로의 간섭의 경우, 섹터화된 안테나를 사용하는 BS국이 nadir (HAPS 커버리지 중심)의 반대편을 바라보고 있을 때에 두 시스템은 효율적으로 운용될 수가 있다. 그러나 HAPS GS로부터 P-MP FWA TS로의 간섭의 경우에서는 충분한 이격거리가 보장되지 않거나, 간섭 경감 기법을 사용하지 않는다면 이 대역에서 두 시스템은 효율적인 스펙트럼 공유가 불가능하다.

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.-Nov. 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 Communication Research Laboratory, vol, 48, no. 4, 2001
  3. Doc.4-9S/219-E, 'Interference from the downlink of fixed service using high altitude platform stations to the uplink of the fixed satellite service in the band 27.5 GHz-28.35 GHz', Mar. 2002
  4. ITU-R Recommendation F.1245, 'Mathemetical model of average and related radiation patterns for ling-of-sight point-to-point radio-realy system antennas for use in certain coordination studies and interference assessment in the frequency range from 1 GHz to about 70 GHz', 2000
  5. ITU-R Recommendation F.1569, 'Technical and operational characteristics for the fixed services using high altitude platform stations in the bands 27.5-28.35 GHz and 31.0-31.3 GHz', 2002
  6. ETSI EN 301 215-2 v 1.3.1, 'Fixed radio systems; point-to-multipoint antenna; antennas for point-to-multipoint fixed radio systems in the 11 GHz to 60 GHz band; Part 2: 24 GHz to 30 GHz', Jun. 2002