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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/28195

Title: Multi-Rate De-spreading Code
Authors: Jia-Chyi Wu;Chi-Min Li;Han-Way Chou
Contributors: NTOU:Department of Communications Navigation and Control Engineering
國立臺灣海洋大學:通訊與導航工程學系
Keywords: DS-CDMA;Walsh Code;Gold Code;Multiple Access Interference (MAI);Sub-Spreading Code
Date: 2007-07-02
Issue Date: 2011-10-21T02:36:10Z
Publisher: Wireless and Optical Communications Networks, 2007. WOCN '07. IFIP International Conference on
Abstract: Abstract:An efficient methodology to construct direct sequence Code Division Multiple Access (DS-CDMA) de-coding scheme has been investigated. System correlation performance is provided and analyzed. Since the perfect orthogonal codes, such as Walsh code, are difficult to obtain massively in conventional DS-CDMA system. To increase the number of spreading code utilized in system, we usually adopt sub-orthogonal codes, such as Gold sequences. Although the number of codes is extensively increased, the Multiple Access Interference (MAI) problem has to be treated more carefully. Especially while lots of users access the DS-CDMA system at the same time. In this study, we proposed a CDMA de-spreading scheme worked in receiver part. The MAI can be treated efficiently in the proposed multi-rate de-spreading scheme.
Relation: pp.1-5
URI: http://ntour.ntou.edu.tw/handle/987654321/28195
Appears in Collections:[通訊與導航工程學系] 演講及研討會

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