Analysis of a CDMA downlink with non-orthogonal spreading sequences for fading channels

被引：0

作者：

Schotten, HD ^{[1
]}

Hadinejad-Mahram, H ^{[1
]}

机构：

[1] Ericsson Eurolab Deutschland GMBH, D-90411 Nurnberg, Germany

来源：

2000 IEEE 51ST VEHICULAR TECHNOLOGY CONFERENCE, PROCEEDINGS, VOLS 1-3 | 2000年

关键词：

D O I：

暂无

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Since the transmitted signals in the downlink of a CDMA system can be time synchronized, orthogonal spreading codes are often used to separate the users' signals. In systems supporting different data-rates, sets of orthogonal codes of different periods can be applied. An important example are the Orthogonal Variable Spreading Factor (OVSF) codes in the 3GPP-WCDMA (UTRA) standard. Since the number of orthogonal codes is limited and a capacity restriction in a CDMA downlink due to code shortage should be avoided, additional (non-orthogonal) spreading codes must be available. In recent years, several construction methods for these codes have been discussed in connection with the development of CDMA-based mobile communication systems. In this paper, the resulting performance when nonorthogonal spreading codes are used is discussed for an AWGN and a fading scenario.

引用

页码：1782 / 1786

页数：5

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