Performance of Multiple High Altitude Platforms using Directive HAP and User Antennas
Wireless Personal Communications: An International Journal
An evaluation of interference mitigation schemes for HAPS systems
EURASIP Journal on Wireless Communications and Networking - Advanced Communication Techniques and Applications for High-Altitude Platforms
WCDMA uplink interference assessment from multiple high altitude platform configurations
EURASIP Journal on Wireless Communications and Networking - Advanced Communication Techniques and Applications for High-Altitude Platforms
Penetration loss measurement and modeling for HAP mobile systems in urban environment
EURASIP Journal on Wireless Communications and Networking - Advanced Communication Techniques and Applications for High-Altitude Platforms
EURASIP Journal on Wireless Communications and Networking - Advanced Communication Techniques and Applications for High-Altitude Platforms
IEEE Transactions on Wireless Communications
Performance of a Multiple HAP System Employing Multiple Polarization
Wireless Personal Communications: An International Journal
Modeling cooperation and coordination in opportunistic spectrum access as a turn-taking dilemma
WOCN'09 Proceedings of the Sixth international conference on Wireless and Optical Communications Networks
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A method of significantly improving the capacity of high-altitude platform (HAP) communications networks operating in the millimeter-wave bands is presented. It is shown how constellations of HAPs can share a common frequency allocation by exploiting the directionality of the user antenna. The system capacity of such constellations is critically affected by the minimum angular separation of the HAPs and the sidelobe level of the user antenna. For typical antenna beamwidths of approximately 5° an inter-HAP spacing of 4 km is sufficient to deliver optimum performance. The aggregate bandwidth efficiency is evaluated, both theoretically using the Shannon equation, and using practical modulation and coding schemes, for multiple HAP configurations delivering either single or multiple cells. For the user antenna beamwidths used, it is shown that capacity increases are commensurate with the increase in the number of platforms, up to 10 HAPs. For increases beyond this the choice of constellation strategy becomes increasingly important.