NDLI: On Wigner-based sparse time-frequency distributions

Content Provider	IEEE Xplore Digital Library
Author	Flandrin, P. Pustelnik, N. Borgnat, P.
Copyright Year	2015
Description	Author affiliation: ENS de Lyon, Lyon, France (Flandrin, P.; Pustelnik, N.; Borgnat, P.)
Abstract	Signals made of the superimposition of a reduced number of AM-FM components can be characterized by a time-frequency signature which consists of weighted trajectories in the plane, thus ending up with an ideal representation of their energy distribution that is intrinsically sparse. Elaborating on first studies that pioneered a compressed sensing solution to the question of approaching such an ideally localized distribution by selecting samples in the ambiguity domain and imposing sparsity in the time-frequency domain, the present paper discusses new advances aimed at achieving better performance in the construction of “cross-term-free” Wigner-type distributions. Improved optimization schemes are first proposed, that both speed up the computation and prove more versatile to accommodate for side constraints such as positivity. A special attention is then paid to the choice of the necessary measurements in the ambiguity plane (in fixed or adapted geometries), emphasizing the key role played by the Heisenberg minimum area, regardless of the signal complexity.
Starting Page	65
Ending Page	68
File Size	579659
Page Count	4
File Format	PDF
e-ISBN	9781479919635
DOI	10.1109/CAMSAP.2015.7383737
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-12-13
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time-frequency analysis Adaptation models Fourier transforms Conferences Kernel Spectrogram Compressed sensing
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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