Proceedings of the 1999 IEEE Information Theory and Communications Workshop (Cat. No. 99EX253)
DOI: 10.1109/itcom.1999.781441
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Abstract: It is shown that t h e Kalman filter implements t h e exact linear MMSE filter i n an asynchronous multiuser CDMA system, given a n y detection delay. T h e Kalman filter is a finite-order recursive filter as opposed to the well-known tapped-delay line (TDL) MMSE filter, which must grow in length with increasing time a n d is therefore not practically implementable. Our result is useful as a baseline for comparison with o t h e r linear detectors, and m a y lead to adaptive detectors with (soft) feedback.

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