Thayaparan, S. and Ng, T.S. and Wang, J. (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.
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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.
|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:||14 Jan 2010 14:38|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/10048 (The current URI for this page, for reference purposes)|
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