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Analysis of soft handover margin in downlink WCDMA system

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2 Author(s)
Tamilselvan, S. ; Dept. of Electron. & Commun. Eng., Pondicherry Eng. Coll., Pondicherry ; Manivannan, K.

The focus of the paper is to analyze the downlink performance of a wideband code division multiple access (WCDMA) system with site selection diversity transmission (SSDT) power control during soft handover (SHO) mode and to find the optimum SHO margin (MSH) in terms of maximum system capacity under energy-per-bit to noise spectral density ratio (Eb/No) quality requirements. Analyzing the dependency of the connection probabilities, percentage of users connected to one, two, or three base stations (BSs) simultaneously as a function of the MSH. The result of this analysis shows an increase in user capacity of about 16% - 20% for the optimum MSH of 5-5.5 dB. Nevertheless, the resources required (number of scrambling codes) by the base station increases faster than the number of active users in terms of MSH.

Published in:

TENCON 2008 - 2008 IEEE Region 10 Conference

Date of Conference:

19-21 Nov. 2008