On the Capacity of an Uplink Synchronised DS-CDMA System in a Multiple Cell Environment

Duk-Kyung KIM  Seung-Hoon HWANG  Dong-Hahk LEE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E87-B   No.6   pp.1697-1701
Publication Date: 2004/06/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
Keyword: 
uplink synchronous transmission,  code shortage,  soft handover,  

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Summary: 
Uplink synchronous transmission has been proposed to improve the uplink capacity of DS-CDMA systems by means of canceling interference from the main paths of other intra-cell users. A significant capacity gain has been reported in a single cell environment. This Letter further investigates the uplink capacity in a multiple cell environment, where two crucial factors are taken into account, namely code shortage problem and soft handover. The impacts of the target Eb/Io and the other-to-own cell interference ratio, together with the number of channelisation codes, are discussed mathematically and then, confirmed through system level simulations with more realistic parameters.