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On the equivalence of three reduced rank linear estimators with applications to DS-CDMA

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3 Author(s)
Wanshi Chen ; Ericsson Wireless Commun., San Diego, CA, USA ; Mitra, U. ; Schniter, P.

This correspondence shows the equivalence of three previously proposed reduced-rank detection schemes for direct-sequence code-division multiple-access (DS-CDMA) communication systems. The auxiliary vector filtering (AVF) algorithm is simplified through a key observation on the construction of the auxiliary vectors. After simplification, it is shown that the AVF algorithm is equivalent to the multistage Wiener filtering (MWF) algorithm of Honig and Goldstein (2002). Furthermore, these schemes can be shown to be equivalent to the multistage linear receiver scheme based on the Cayley-Hamilton (CH) theorem when the minimum mean-square error (MMSE) criterion is applied to the reduced dimensional space of the received signal.

Published in:

Information Theory, IEEE Transactions on  (Volume:48 ,  Issue: 9 )

Date of Publication:

Sep 2002

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