Orthogonal multiuser detection

Authors:
Yonina C. Eldar;Alan V. Oppenheim
Affiliations:
Research Laboratory of Electronics, Massachusetts Institute of Technology, Room 36-615, Cambridge, MA;Research Laboratory of Electronics, Massachusetts Institute of Technology, Room 36-615, Cambridge, MA
Venue:
Signal Processing
Year:
2002

Citing 4
Cited 1

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Orthogonal and projected orthogonal matched filter detection

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Orthogonal matched filter detection

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On quantum detection and the square-root measurement

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Orthogonal and projected orthogonal matched filter detection

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Abstract

In this paper we propose a new linear multiuser detector for synchronous CDMA systems. Specifically, the received signal is demodulated using an orthogonal multiuser (OMU) receiver that is matched to a set of orthogonal vectors that are closest in a least-squares sense to the signature vectors. We show that this approach is equivalent to optimally whitening the noise component in the output of the decorrelator prior to detection. We provide simulation results suggesting that in many cases the OMU detector outperforms the matched filter detector and the decorrelator.