Turkish Journal of Electrical Engineering and Computer Sciences




In this paper, the performance of HAPs (High Altitudes Platforms) UMTS HSDPA (High Speed Downlink Packet Access) is studied for different HAPs height h, different cells radius R and two directions (0° and 30°) within the cell. The network under study is assumed to have 61 ground cells. It is noticed that, for urban zone users, the effective range is lower than the effective range for users in rural zones for a given modulation scheme. Also it is noticed that in rural zone, the HSDPA can support higher modulation schemes. It is noticed that, when 80% of the base station total power is assigned to the HSDPA service, then, for rural zones three HSDPA users can be supported with the highest modulation scheme (3/4 16QAM). Also it is noticed that, in urban zones, only one HSDPA user can be supported with the highest modulation scheme.


HAPs, W-CDMA, UMTS, HSDPA, Carrier-to-interference ratio

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