Sampling without time: Recovering echoes of light via temporal phase retrieval
Name
1701.08222.pdf
Description
Submitted version
Size
2.87 MB
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Unknown
Checksum (MD5)
9407e450fb6826adb67bdc7d8a8a2395
Author(s)
Bhandari, Ayush
Bourquard, Aurelien
Raskar, Ramesh
Date Issued
March 2017
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Bhandari, Ayush, Bourquard, Aurélien and Raskar, Ramesh. 2017. "Sampling without time: Recovering echoes of light via temporal phase retrieval."
Version
Original manuscript
Abstract
© 2017 IEEE. This paper considers the problem of sampling and reconstruction of a continuous-time sparse signal without assuming the knowledge of the sampling instants or the sampling rate. This topic has its roots in the problem of recovering multiple echoes of light from its low-pass filtered and auto-correlated, time-domain measurements. Our work is closely related to the topic of sparse phase retrieval and in this context, we discuss the advantage of phase-free measurements. While this problem is ill-posed, cues based on physical constraints allow for its appropriate regularization. We validate our theory with experiments based on customized, optical time-of-flight imaging sensors. What singles out our approach is that our sensing method allows for temporal phase retrieval as opposed to the usual case of spatial phase retrieval. Preliminary experiments and results demonstrate a compelling capability of our phaseretrieval based imaging device.
MIT Department
Massachusetts Institute of Technology. Media Laboratory
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1109/ICASSP.2017.7952873
