1. Declipping and the recovery of vectors from saturated measurements
- Author
-
Alharbi, Wedad, Freeman, Daniel, Ghoreishi, Dorsa, Johnson, Brody, and Randrianarivony, N. Lovasoa
- Subjects
Mathematics - Functional Analysis ,Mathematics - Metric Geometry ,Mathematics - Numerical Analysis ,42C15, 46T20, 51F30, 94A12 - Abstract
A frame $(x_j)_{j\in J}$ for a Hilbert space $H$ allows for a linear and stable reconstruction of any vector $x\in H$ from the linear measurements $(\langle x,x_j\rangle)_{j\in J}$. However, there are many situations where some information in the frame coefficients is lost. In applications where one is using sensors with a fixed dynamic range, any measurement above that range is registered as the maximum, and any measurement below that range is registered as the minimum. Depending on the context, recovering a vector from such measurements is called either declipping or saturation recovery. We initiate a frame theoretic approach to saturation recovery in a similar way to what [BCE06] did for phase retrieval. We characterize when saturation recovery is possible, show optimal frames for use with saturation recovery correspond to minimal multi-fold packings in projective space, and prove that the classical frame algorithm may be adapted to this non-linear problem to provide a reconstruction algorithm., Comment: 20 pages
- Published
- 2024