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Andrew Logothetis
and
Catharina Carlemalm
IEEE Transactions on Signal Processing,
vol. 48, no.11, Nov. 2000. © 2000 IEEE
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Abstract:
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Algorithms to estimate blindly the parameters
and input sequences for a multiuser asynchronous
CDMA system are proposed.
The communication system is modeled as a frequency
selective fading channel with multipath propagation where
the number of active propagation channels is unknown and highly
time-varying.
Estimates of input sequences and unknown parameters are jointly
computed via the SAGE algorithm.
The SAGE algorithm provides a unified approach in
combining jointly multiuser detection and parameter estimation in an
optimal way.
Depending on the realizations of the SAGE
algorithm well-known state and parameter
estimation schemes of various complexities are optimally combined.
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Related publications:
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Channel estimation in Asynchronous CDMA,
Eusipco 2000-paper.
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Source:
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Postscript, 401K
Pdf, 357K
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