6 research outputs found

    Uplink (Reverse Link) Capacity of An Air-Ground W-CDMA System

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    In this work, the uplink capacity and the interference statistics are given for an W-CDMA 3-D Airto- Ground (AG) cellular like network assuming imperfect power control and finite transmitted power. The free space model of propagation is used to calculate the intercellular interference. The uplink capacity has been studied for different frequencies and scenarios. It has been shown that, the effect of rain is to reduce the uplink capacity and the maximum allowable cell radius. Also it is shown that, the frequency of operation should be lower or equal to 2 GHz. For a frequency of operation of 2 GHz, the cell capacity can reach 70 voice users or 46 data users when the cell radius is 350km. The new contribution of the paper is the study of the effect of the imperfect power control and the finite transmitted power on the uplink capacity of the Air-Ground system for different values of outage

    3D Outside Cell Interference Factor for an Air-Ground CDMA ‘Cellular’ System

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    We compute the outside-cell interference factor of a code-division multiple-access (CDMA) system for a three-dimensional (3-D) air-to-ground (AG) cellular-like network consisting of a set of uniformly distributed ground base stations and airborne mobile users. The CDMA capacity is roughly inversely proportional to the outside-cell interference factor. It is shown that for the nearly free-space propagation environment of these systems, the outside-cell interference factor can be larger than that for terrestrial propagation models (as expected) and depends approximately logarithmically upon both the cell height and cell radius
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