Proportionate Adaptive Filtering for Block-Sparse System Identification

In this paper, a new family of proportionate normalized least mean square (PNLMS) adaptive algorithms that improve the performance of identifying block-sparse systems is proposed. The main proposed algorithm, called block-sparse PNLMS (BS-PNLMS), is based on the optimization of a mixed l2,1 norm of...

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Veröffentlicht in:IEEE/ACM transactions on audio, speech, and language processing speech, and language processing, 2016-04, Vol.24 (4), p.623-630
Hauptverfasser: Jianming Liu, Grant, Steven L.
Format: Artikel
Sprache:eng
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Zusammenfassung:In this paper, a new family of proportionate normalized least mean square (PNLMS) adaptive algorithms that improve the performance of identifying block-sparse systems is proposed. The main proposed algorithm, called block-sparse PNLMS (BS-PNLMS), is based on the optimization of a mixed l2,1 norm of the adaptive filter's coefficients. It is demonstrated that both the NLMS and the traditional PNLMS are special cases of BS-PNLMS. Meanwhile, a block-sparse improved PNLMS (BS-IPNLMS) is also derived for both sparse and dispersive impulse responses. Simulation results demonstrate that the proposed BS-PNLMS and BS-IPNLMS algorithms outperformed the NLMS, PNLMS and IPNLMS algorithms with only a modest increase in computational complexity.
ISSN:2329-9290
2329-9304
DOI:10.1109/TASLP.2015.2499602