NDLI: Effective capacity of advanced wireless cellular networks

Content Provider	IEEE Xplore Digital Library
Author	Glisic, S. Nikolic, Z. Milosevic, N. Pirinnen, P.
Copyright Year	2005
Description	Author affiliation: Telecommun. Lab., Oulu Univ. (Glisic, S.; Nikolic, Z.; Milosevic, N.; Pirinnen, P.)
Abstract	In this paper we analyze capacity losses in advanced code division multiple access (CDMA) network due to imperfections in the operation of the system components. In addition to the standard WCDMA technology both, base stations and mobile units use antenna beam forming and self steering to track the incoming (and transmitted) signal direction. By using high directivity antennas and antenna pointer tracking the level of multiple access interference (MAI) and the required transmitted power are reduced. In order to exploit the available propagation diversity signals arriving from different directions (azimuth psi elevation phi) and delay tau, are combined in 3D (psi phi, tau) RAKE receiver. This is expected to significantly improve the system performance. The main result of this work is a systematic mathematical framework for capacity evaluation of such CDMA network in the presence of implementation imperfections and fading channel. The theory is general and some examples of practical set of channel and system parameters are used as illustration. As an example, it was shown that in the case of voice applications and 2D (4 antennastimes4 multipaths) RAKE receive, up to 90% of the system capacity can be lost due to the system imperfections. Further elaboration of these results, including extensive numerical analysis based on the offered analytical framework, would provide enough background for understanding of possible evolution of advanced W-CDMA and MC-CDMA towards the fourth generation of mobile cellular communication networks
Starting Page	2771
Ending Page	2780
File Size	2167357
Page Count	10
File Format	PDF
ISBN	9783800729098
DOI	10.1109/PIMRC.2005.1651947
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-11
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Land mobile radio cellular systems Multiaccess communication Transmitting antennas Antennas and propagation Multiple access interference Fading Base stations Directive antennas Mobile antennas Azimuth
Content Type	Text
Resource Type	Article

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