NDLI: Performance of synchronous multirate CDMA via statistical physics

Content Provider	IEEE Xplore Digital Library
Author	Dongning Guo
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Northwestern Univ., Evanston, IL (Dongning Guo)
Abstract	New results are reported on the performance of synchronous multirate code-division multiple access (CDMA) systems. It has been shown using a statistical physics approach that, under arbitrary inputs and signal-to-noise ratios (SNRs), a CDMA channel followed by a generic multiuser detection front end can be decoupled into a bank of Gaussian single-user channels in the large-system limit. This work extends the analysis to multirate CDMA where users may employ a combination of adaptive modulation, variable spreading factor, and multicode schemes to transmit at different data rates. It is found that the decoupling principle still holds, i.e., each user experiences an equivalent single-user Gaussian channel, where the degradation in the SNR, known as the multiuser efficiency, is obtained analytically by solving some fixed-point equations. This result applies to optimal multiuser detectors as well as many well-know suboptimal detectors. The simple large-system characterization of multirate CDMA encompasses many previous results as special cases
Starting Page	199
Ending Page	203
File Size	151804
Page Count	5
File Format	PDF
ISBN	0780391519
DOI	10.1109/ISIT.2005.1523322
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-04
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Detectors Multiuser detection Degradation Signal to noise ratio Gaussian channels Physics computing Equations Wireless communication Multimedia systems
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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