NDLI: Angle-and-time-domain gating technique for time-reversal MUSIC imaging

Content Provider	IEEE Xplore Digital Library
Author	Heedong Choi Ogawa, Y. Nishimura, T. Ohgane, T.
Copyright Year	2012
Description	Author affiliation: Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan (Heedong Choi; Ogawa, Y.; Nishimura, T.; Ohgane, T.)
Abstract	Time-reversal multiple signal classification (TR-MUSIC) [1] has been a topic of recent interest in a variety of disciplines, including acoustics, communication and industrial applications [2]. Among the developed TR-MUSIC methodology, the TR-MUSIC imaging with the time-domain gating technique not only provides noise reduction by filtering in the time domain, but also relaxes the transceiver restriction by reducing the number of targets (scatterers) to be detected at one time [3]. Because the developed TR-MUSIC algorithm based on the time-domain gating technique extracts target response(s) in the time domain, it has a one-dimensional (time-domain) filtering effect in the scattering scenario. Unfortunately, this image is subject to focusing errors which are caused by many targets in the gated region. It also requires non-trivial conditions, that is, target response(s) or sidelobes (skirts) of the responses must be separated with one another to extract desired response(s) [3]. However, it may be difficult for this condition to be satisfied because targets are irregularly and/or randomly spread out over the scattering scenario. In this study, we propose a two-dimensional (angle-and-time-domain) gating technique accompanied with the fast Fourier transform (FFT) and spatial FFT processing. The concept of the spatial FFT has been proposed and considered as a beamforming technique [4]. By utilizing the weight adaptation, the beamforming technique can estimate coarse directions of arrival. Therefore, if we suppress unwanted signal(s) in the angle domain, we can overcome the above obstacle in the same scattering configuration. That is, since the proposed gating technique extracts targets in the two-dimensional region, we can expect the improvement of imaging function.
Starting Page	86
Ending Page	89
File Size	409673
Page Count	4
File Format	PDF
ISBN	9781467310017
e-ISBN	9784885522703
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-29
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electronics, Information and Communication Engineers (IEICE)
Subject Keyword	Noise Imaging Logic gates Time domain analysis Vectors Arrays Antennas
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
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