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• W2954338002 abstract "We address the problem of signal denoising and pattern recognition in processing batch-mode time-series data by combining linear time-invariant filters, orthogonal multiresolution representations, and sparsity-based methods. We propose a novel approach to designing higher-order zero-phase low-pass, high-pass, and band-pass infinite impulse response filters as matrices, using spectral transformation of the state-space representation of digital filters. We also propose a proximal gradient-based technique to factorize a special class of zero-phase high-pass and band-pass digital filters so that the factorization product preserves the zero-phase property of the filter and also incorporates a sparse-derivative component of the input in the signal model. To demonstrate applications of our novel filter designs, we validate and propose new signal models to simultaneously denoise and identify patterns of interest. We begin by using our proposed filter design to test an existing signal model that simultaneously combines linear time invariant (LTI) filters and sparsity-based methods. We develop a new signal model called sparsity-assisted signal denoising (SASD) by combining our proposed filter designs with the existing signal model. Thereafter, we propose and derive a new signal model called sparsity-assisted pattern recognition (SAPR). In SAPR, we combine LTI band-pass filters and sparsity-based methods with orthogonal multiresolution representations, such as wavelets, to detect specific patterns in the input signal. Finally, we combine the signal denoising and pattern recognition tasks, and derive a new signal model called the sparsity-assisted signal denoising and pattern recognition (SASDPR). We illustrate the capabilities of the SAPR and SASDPR frameworks using sleep-electroencephalography data to detect K-complexes and sleep spindles, respectively." @default.
• W2954338002 created "2019-07-12" @default.
• W2954338002 creator A5031212309 @default.
• W2954338002 creator A5063691089 @default.
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• W2954338002 date "2019-06-26" @default.
• W2954338002 modified "2023-10-16" @default.
• W2954338002 title "Sparsity-Assisted Signal Denoising and Pattern Recognition in Time-Series Data" @default.
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• W2954338002 doi "https://doi.org/10.48550/arxiv.1906.11330" @default.
• W2954338002 hasPublicationYear "2019" @default.
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