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Blind multiuser MMSE detector for CDMA signals in ISI channels

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4 Author(s)
Gesbert, D. ; Gigabit Wireless Inc., Mountain View, CA, USA ; Sorelius, J. ; Stoica, Petre ; Paulraj, A.

A technique is introduced that allows the blind and direct estimation of an optimal, in the minimum mean-squared error sense, linear multiuser receiver for direct-sequence code-division multiple-access signals. We consider the case of an asynchronous multiple access channel in the presence of possibly large intersymbol-interference. Our approach does not require channel estimation and uses the knowledge of the code for the user of interest only, Unlike other comparable techniques, this method converges to the true optimum receiver as the sample size increases, regardless of signal-to-noise ratio.

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Communications Letters, IEEE  (Volume:3 ,  Issue: 8 )