The impact of frequency-flat fading on the spectral efficiency of CDMA

The capacity of the randomly spread synchronous code-division multiple-access (CDMA) channel subject to frequency-flat fading is studied in the wide-band limit of large number of users. We find the spectral efficiency as a function of the number of users per chip, the distribution of the flat fading...

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Bibliographic Details
Published inIEEE transactions on information theory Vol. 47; no. 4; pp. 1302 - 1327
Main Authors Shamai, S., Verdu, S.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2001
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Channels
Code division multiaccess
Code Division Multiple Access
Communication channels
Fading
Frequencies
Impact analysis
Information theory
Matched filters
Power control
Receivers
Spread spectrum
Spreads
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Summary:The capacity of the randomly spread synchronous code-division multiple-access (CDMA) channel subject to frequency-flat fading is studied in the wide-band limit of large number of users. We find the spectral efficiency as a function of the number of users per chip, the distribution of the flat fading, and the signal-to-noise ratio (SNR), for the optimum receiver as well as linear receivers (single-user matched filter, decorrelator, and minimum mean-square error (MMSE)). The potential improvements due to both decentralized transmitter power control and multi-antenna receivers are also analyzed.
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ISSN:0018-9448
1557-9654
DOI:10.1109/18.923717