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An Overview of Code-Spread CDMA
| Content Provider | CiteSeerX |
|---|---|
| Author | Svensson, Arne |
| Abstract | Code-division multiple-access (CDMA) has gained a lot of attention recently when the third generation mobile communication systems are developed. In this paper we discuss how using low-rate channel coding instead of direct sequence spreading can more efficiently use the available spectrum. This leads to large capacity improvements. 1 Introduction Spread spectrum systems have been used for decades as a way of achieving robustness against interference and jamming [1]. The spread spectrum technique is now also becoming popular in commercial systems because of its inherent robustness in multipath fading channels, and as a promising multiple access technique. As a multiple access method, most interest has been given to direct-sequence code-division multiple-access (DS-CDMA), where spreading is achieved by multiplication of the signal by a pseudo-random spreading sequence. A number of multi-user detection schemes have been proposed for reducing the multiple-access interference (MAI) and ob... |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Commercial System Introduction Spread Spectrum System Promising Multiple Access Technique Multipath Fading Channel Direct-sequence Code-division Multiple-access Direct Sequence Spreading Inherent Robustness Code-spread Cdma Large Capacity Improvement Code-division Multiple-access Third Generation Mobile Communication System Pseudo-random Spreading Sequence Multiple-access Interference Multi-user Detection Scheme Low-rate Channel Available Spectrum Multiple Access Method Spread Spectrum Technique |
| Content Type | Text |
| Resource Type | Article |
