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http://dx.doi.org/10.6109/jkiice.2007.11.3.459

A Proposal of the Maximum Allowable Off-axis e.i.r.p. Level of HAPS Ground Station for Frequency Sharing with 47/48GHz FSS system  

Kang, Young-Heung (군산 대학교)
Choi, Mun-Hwan (군산 대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.11, no.3, 2007 , pp. 459-464 More about this Journal
Abstract
Resolution 122 requires to study power limitation applicable for HAPS ground stations to facilitate sharing with space station receivers in 47/48GHz bands. ITU-R Recommendation 1481-1 recommends to improve the side lobe characteristics of HAPS ground station antenna for frequency sharing between FSS system and HAPS system. In this paper, we propose the maximum allowable off-axis e.i.r.p. level of HAPS ground station antennas by considering power limitation to HAPS ground station in Resolution 122, and by improving the side lobe characteristics of HAPS ground station antennas in Recommendation SF.1481-1. The simulation results show that the unfeasible sharing distance between HAPS ground station and FSS earth station can be reduced remarkably, and give the possibility of frequency sharing between two above systems.
Keywords
HAPS; FSS; Frequency sharing; Off-axis level;
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  • Reference
1 ITU-R Recommendation F.1500, Preferred characteristics of systems in the fixed service using high altitude platforms operating in the bands 47.2-47.5GHz and 47.9-48.2GHz
2 Resolution 122, Use of the bands 47.2-47.5GHz and 47.9-48.2GHz by high altitude platform stations(HAPS) in the fixed service and by other services, ITU-R
3 ITU-R Recommendation SF. 1481-1, Frequency sharing between systems in the fixed service using high-altitude platform stations and satellite systems in the geostationary orbit in the fixed-satellite service in the bands 47.2-47.5 and 47.9-48.2GHz
4 ITU-R Recommendation F.699-6, Reference radiation patterns for line-of-sight radio-relay system antennas for use in coordination studies and interference assessment in the frequency range from 1 GHz to about 70 GHz
5 ITU-R Recommendation S.524-8, Maximum permissible levels of off-axis e.i.r.p. density from earth station in geostationary-satellite orbit networks operating in the fixed-satellite service transmitting in the 6GHz, 14GHz and 30GHz frequency bands
6 ITU-R Recommendation S.672-4, Satellite antenna radiation pattern for use as a design objective in the fixed-satellite service employing geostationary satellites