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• W1571570469 abstract "In this work, we obtain sufficient conditions for the stability of our recently proposed algorithms, Least Squares Compressive Sensing residual (LS-CS) and modified-CS, for recursively reconstructing sparse signal sequences from noisy measurements. By stability we mean that the number of misses from the current support estimate and the number of extras in it remain bounded by a time-invariant value at all times. We show that, for a signal model with fixed signal power and support set size; support set changes allowed at every time; and gradual coefficient magnitude increase/decrease, stability holds under mild assumptions -- bounded noise, high enough minimum nonzero coefficient magnitude increase rate, and large enough number of measurements at every time. A direct corollary is that the reconstruction error is also bounded by a time-invariant value at all times. If the support set of the sparse signal sequence changes slowly over time, our results hold under weaker assumptions than what simple compressive sensing (CS) needs for the same error bound. Also, our support error bounds are small compared to the support size. Our discussion is backed up by Monte Carlo simulation based comparisons." @default.
• W1571570469 created "2016-06-24" @default.
• W1571570469 creator A5005043504 @default.
• W1571570469 date "2011-04-12" @default.
• W1571570469 modified "2023-09-27" @default.
• W1571570469 title "Stability of Modified-CS and LS-CS for Recursive Reconstruction of Sparse Signal Sequences" @default.
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