Unlimited sampling with local averages
File(s)ICASSP_2022_Average_Sampling.pdf (1.27 MB)
Accepted version
Author(s)
Florescu, Dorian
Bhandari, Ayush
Type
Conference Paper
Abstract
Signal saturation or clipping is a fundamental bottleneck that limits the capability of analog-to-digital converters (ADCs). The problem arises when the input signal dynamic range is larger than ADC’s dynamic range. To overcome this issue, an alternative acquisition protocol called the Unlimited Sensing Framework (USF) was recently proposed. This non-linear sensing scheme incorporates signal folding (via modulo non-linearity) before sampling. Reconstruction then entails "unfolding" of the high dynamic range input. Taking an end-to-end approach to the USF, a hardware validation called US-ADC was recently presented. US-ADC experiments show that, in some scenarios, the samples can be more accurately modelled as local averages than ideal, pointwise measurements. In particular, this happens when the input signal frequency is much larger than the operational bandwidth of the US-ADC. Pushing such hardware limits using computational approaches motivates the study of modulo sampling and reconstruction via local averages. By incorporating a modulo-hysteresis model, both in theory and in hardware, we present a guaranteed recovery algorithm for input reconstruction. We also explore a practical method suited for low sampling rates. Our approach is validated via simulations and experiments on hardware, thus enabling a step closer to practice.
Date Issued
2022-04-27
Date Acceptance
2022-05-01
Citation
ICASSP 2022 - 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2022, pp.5742-5746
ISSN
1520-6149
Publisher
IEEE
Start Page
5742
End Page
5746
Journal / Book Title
ICASSP 2022 - 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Copyright Statement
Copyright © 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.
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000864187906008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Source
47th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Subjects
Acoustics
Analog-to-digital conversion (ADC)
average sampling
Computer Science
Computer Science, Artificial Intelligence
Engineering
Engineering, Electrical & Electronic
harmonic analysis
modulo samples
RECONSTRUCTION
sampling theory
Science & Technology
Technology
Publication Status
Published
Start Date
2022-05-22
Finish Date
2022-05-27
Coverage Spatial
Singapore