HAPS 지상국에서 P-MP FWA 시스템으로의 간섭 영향 분석 = Analysis on the Effects of Interference from HAPS Ground Stations to P-MP FWA System

국문 초록 (Abstract)

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.

다국어 초록 (Multilingual 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.

참고문헌 (Reference)

1 "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.

2 "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.

3 "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" 2002

4 "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" 2002

5 "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" 2002

6 "Analysis on the Interference effects into the radio-relay station from the HAPS system" 2001

7 "A study of frequency sharing and contribution to ITU for wireless communication systems using stratospheric platforms" 2001