Back in the US-SR: unlimited sampling and sparse super-resolution with Its hardware validation
File(s)SPL-32939-2022 Report.pdf (2.11 MB)
Accepted version
Author(s)
Bhandari, Ayush
Type
Journal Article
Abstract
The Unlimited Sensing Framework (USF) is a digital acquisition protocol that allows for sampling and reconstruction of high dynamic range signals. By acquiring modulo samples, the USF circumvents the clipping or saturation problem that is a fundamental bottleneck in conventional analog-to-digital converters (ADCs). In the context of the USF, several works have focused on bandlimited function classes and recently, a hardware validation of the modulo sampling approach has been presented. In a different direction, in this paper we focus on non-bandlimited function classes and consider the well-known super-resolution problem; we study the recovery of sparse signals (Dirac impulses) from low-pass filtered, modulo samples. Taking an end-to-end approach to USF based super-resolution, we present a novel recovery algorithm (US-SR) that leverages a doubly sparse structure of the modulo samples. We derive a sampling criterion for the US-SR method. A hardware experiment with the modulo ADC demonstrates the empirical robustness of our method in a realistic, noisy setting, thus validating its practical utility.
Date Issued
2022-03-23
Date Acceptance
2022-03-17
Citation
IEEE Signal Processing Letters, 2022, 29, pp.1047-1051
ISSN
1070-9908
Publisher
Institute of Electrical and Electronics Engineers
Start Page
1047
End Page
1051
Journal / Book Title
IEEE Signal Processing Letters
Volume
29
Copyright Statement
© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor
UK Research and Innovation council
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000790810400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
Future Leaders Fellowship
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Engineering
Hardware
Imaging
Superresolution
Signal resolution
Sensors
Kernel
Heuristic algorithms
Analog-to-digital
modulo sampling
Prony's method
Shannon sampling
spectral estimation
super-resolution
DECONVOLUTION
Publication Status
Published
Date Publish Online
2022-03-23