LMS estimation via structural detection

We consider the LMS estimation of a channel that may be well approximated by an FIR model with only a few nonzero tap coefficients within a given delay horizon or tap length n. When the number of nonzero tap coefficients m is small compared with the delay horizon n, the performance of the LMS estima...

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Bibliographic Details
Published in:IEEE transactions on signal processing 1998-10, Vol.46 (10), p.2651-2663
Main Authors: Homer, J., Mareels, I., Bitmead, R.R., Wahlberg, B., Gustafsson, A.
Format: Article
Language:English
Subjects:
Acoustic applications
Adaptive estimation
Adaptive filters
Adaptive signal detection
Applied sciences
Automatic control
Circuit simulation
Cyclic redundancy check
Delay estimation
Delays
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Filtering theory
Finite impulse response filter
FIR filters
Information technology
Information, signal and communications theory
Informationsteknik
Land mobile radio
Least mean squares methods
Least squares approximation
Least squares methods
Reglerteknik
Signal and communications theory
Signal, noise
TECHNOLOGY
TEKNIKVETENSKAP
Telecommunication channels
Telecommunications and information theory
Telephony
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Summary:We consider the LMS estimation of a channel that may be well approximated by an FIR model with only a few nonzero tap coefficients within a given delay horizon or tap length n. When the number of nonzero tap coefficients m is small compared with the delay horizon n, the performance of the LMS estimator is greatly enhanced when this specific structure is exploited. We propose a consistent algorithm that performs identification of nonzero taps only. The results are illustrated via a simulation study.
ISSN:1053-587X
1941-0476
1941-0476
DOI:10.1109/78.720368