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• W2575581645 abstract "Whenever we use devices to take measurements, calibration is indispensable. While the purpose of calibration is to reduce bias and uncertainty in the measurements, it can be quite difficult, expensive and sometimes even impossible to implement. We study a challenging problem called self-calibration, i.e., the task of designing an algorithm for devices so that the algorithm is able to perform calibration automatically. More precisely, we consider the setup $boldsymbol{y} = mathcal{A}(boldsymbol{d}) boldsymbol{x} + boldsymbol{epsilon}$ where only partial information about the sensing matrix $mathcal{A}(boldsymbol{d})$ is known and where $mathcal{A}(boldsymbol{d})$ linearly depends on $boldsymbol{d}$. The goal is to estimate the calibration parameter $boldsymbol{d}$ (resolve the uncertainty in the sensing process) and the signal/object of interests $boldsymbol{x}$ simultaneously. For three different models of practical relevance we show how such a bilinear inverse problem, including blind deconvolution as an important example, can be solved via a simple linear least squares approach. As a consequence, the proposed algorithms are numerically extremely efficient, thus allowing for real-time deployment. Explicit theoretical guarantees and stability theory are derived and the number of sampling complexity is nearly optimal (up to a poly-log factor). Applications in imaging sciences and signal processing are discussed and numerical simulations are presented to demonstrate the effectiveness and efficiency of our approach." @default.
• W2575581645 created "2017-01-26" @default.
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• W2575581645 date "2016-11-13" @default.
• W2575581645 modified "2023-09-27" @default.
• W2575581645 title "Self-Calibration via Linear Least Squares" @default.
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• W2575581645 hasPublicationYear "2016" @default.
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