Smooth Approximation l0-Norm Constrained Affine Projection Algorithm and Its Applications in Sparse Channel Estimation
Joint Authors
Li, Yingsong
Hamamura, Masanori
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-03-03
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
We propose a smooth approximation l0-norm constrained affine projectionalgorithm (SL0-APA) to improve the convergence speed and the steady-state error of affine projectionalgorithm (APA) for sparse channel estimation.
The proposed algorithm ensures improved performance interms of the convergence speed and the steady-state error via the combination of a smooth approximationl0-norm (SL0) penalty on the coefficients into the standard APA cost function, which gives rise to a zeroattractor that promotes the sparsity of the channel taps in the channel estimation and hence acceleratesthe convergence speed and reduces the steady-state error when the channel is sparse.
The simulationresults demonstrate that our proposed SL0-APA is superior to the standard APA and its sparsity-awarealgorithms in terms of both the convergence speed and the steady-state behavior in a designated sparsechannel.
Furthermore, SL0-APA is shown to have smaller steady-state error than the previously proposedsparsity-aware algorithms when the number of nonzero taps in the sparse channel increases.
American Psychological Association (APA)
Li, Yingsong& Hamamura, Masanori. 2014. Smooth Approximation l0-Norm Constrained Affine Projection Algorithm and Its Applications in Sparse Channel Estimation. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-1051666
Modern Language Association (MLA)
Li, Yingsong& Hamamura, Masanori. Smooth Approximation l0-Norm Constrained Affine Projection Algorithm and Its Applications in Sparse Channel Estimation. The Scientific World Journal No. 2014 (2014), pp.1-15.
https://search.emarefa.net/detail/BIM-1051666
American Medical Association (AMA)
Li, Yingsong& Hamamura, Masanori. Smooth Approximation l0-Norm Constrained Affine Projection Algorithm and Its Applications in Sparse Channel Estimation. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-1051666
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051666