The Use of Delay-Locked Loop Signals in DS/CDMA Receiver for Multiple-Access Interference Reduction

Thayaparan, Subramaniam and Ng, Tung-Sang and Wang, Jiangzhou (2006) The Use of Delay-Locked Loop Signals in DS/CDMA Receiver for Multiple-Access Interference Reduction. IEEE Transactions on Vehicular Technology, 55 (3). pp. 980-989. ISSN 0018-9545. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1109/TVT.2006.874575

Abstract

This paper presents a coherent demodulation scheme that reduces the multiple-access interference (MAI) considerably in a band-limited direct-sequence code-division multiple-access system. The despreading signal is obtained from a combination of the conventional despreading signal and its weighted early and late versions that are used in the delay-locked loop (DLL). It is shown that with appropriate choice of the weighting parameter of the early-late signals of the DLL, the signal-to-interference-plus-noise ratio of the decision variable is increased, which leads to improvement in the bit-error performance and hence the potential increase in the system capacity by about 25%. The analyses are performed in the frequency domain. The effect of imperfect synchronization on the system performance is also analyzed.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunications
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Yiqing Liang
Date Deposited: 12 Sep 2008 20:19
Last Modified: 11 Jun 2014 08:55
Resource URI: http://kar.kent.ac.uk/id/eprint/10048 (The current URI for this page, for reference purposes)
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