IEEE Transactions on Signal Processing,
vol. 48, no.11, Nov. 2000.
© 2000 IEEE
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
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
Depending on the realizations of the SAGE
algorithm well-known state and parameter
estimation schemes of various complexities are optimally combined.
Channel estimation in Asynchronous CDMA,
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