Intersystem Interference Reduction for Overlaid HAPS-Terrestrial CDMA System

Jeng-Ji HUANG  Wei-Ting WANG  Mingfu LI  David SHIUNG  Huei-Wen FERNG  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.1   pp.334-338
Publication Date: 2008/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.1.334
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
HAPS,  CDMA,  interference,  capacity,  

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In this letter, we propose that directional antennas, combined with power management, be incorporated to reduce intersystem interference in a shared band overlaid high altitude platform station (HAPS)-terrestrial code division multiple access (CDMA) system. To eliminate the HAPS to terrestrial interference, the HAPS is accessed only via directional antennas under the proposed scheme. By doing so, the uplink power to the HAPS can accordingly be increased, so that the terrestrial to HAPS interference is also effectively suppressed.