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Blind fractionally spaced equalization of noisy FIR channels: direct and adaptive solutions

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2 Author(s)
Giannakis, G.B. ; Dept. of Electr. Eng., Virginia Univ., Charlottesville, VA, USA ; Halford, S.D.

Blind fractionally spaced equalizers reduce intersymbol interference using second-order statistics without the need for training sequences. Methods for finding FIR zero-forcing blind equalizers directly from the observations are described, and adaptive versions are developed. In contrast, most current methods require channel estimation as a first step to estimating the equalizer. The direct methods can be zero-forcing, minimum mean-square error, or even minimum mean square error (MMSE) within the class of zero-forcing equalizers. Performance of the proposed methods and comparisons with existing approaches are shown for a variety of channels, including an empirically measured digital microwave channel

Published in:

Signal Processing, IEEE Transactions on  (Volume:45 ,  Issue: 9 )

Date of Publication:

Sep 1997

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