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In this paper, the power allocation strategy in the downlink of a W-CDMA system is investigated, with the aim of assessing the network capacity. It is known that the downlink capacity for a base is limited by the maximum transmit power, which is a common resource to be shared by all users; if one user requires a large fraction of the allowed transmit power, the overall capacity could be decreased: in the work herein we analyse the impact on the capacity of a power allocation strategy which limits the maximum fraction of transmit power per link. A semi-analytical model is developed, considering a classical propagation model and taking soft handover and a multi-service scenario into account. The results show cell capacity as a function of some interesting parameters, such as the cell radius and the number of bases included in the active set. Both the cases of omni and sectorised cells are considered.
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on (Volume:1 )
Date of Conference: 15-18 Sept. 2002