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However, its convergence slows down when the input signal is colored. To address this issue, this paper firstly introduces the normalized subband adaptive filter (NSAF) into the constrained filtering problem and derives a constrained NSAF (CNSAF) algorithm using the Lagrange multiplier method. Benefiting from the good decorrelation capability of the NSAF, the proposed CNSAF algorithm significantly improves the convergence performance of the CLMS algorithm under colored inputs. Then, the mean and mean-square stability of the CNSAF algorithm is analyzed, and the theoretical models to characterize the transient and steady-state mean square deviation (MSD) behaviors of the CNSAF algorithm are derived utilizing the Kronecker product property and vectorization method. Further to extend the CNSAF algorithm to the problem of sparse system identification, a sparse version of the CNSAF algorithm (S-CNSAF) is derived. Finally, the validity of the derived theoretical MSD prediction models and the superiority of the proposed algorithms are confirmed by extensive computer simulations on system identification with colored inputs.<\/jats:p>","DOI":"10.1007\/s00034-024-02685-3","type":"journal-article","created":{"date-parts":[[2024,4,27]],"date-time":"2024-04-27T18:01:59Z","timestamp":1714240919000},"page":"4605-4623","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Constrained Normalized Subband Adaptive Filter Algorithm and Its Performance Analysis"],"prefix":"10.1007","volume":"43","author":[{"given":"Wenjing","family":"Xu","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4756-771X","authenticated-orcid":false,"given":"Haiquan","family":"Zhao","sequence":"additional","affiliation":[]},{"given":"Shaohui","family":"Lv","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2024,4,27]]},"reference":[{"key":"2685_CR1","doi-asserted-by":"publisher","first-page":"125","DOI":"10.1109\/LSP.2023.3242123","volume":"30","author":"OM Abdelrhman","year":"2023","unstructured":"O.M. 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