Please wait, while we are loading the content...
Please wait, while we are loading the content...
Content Provider | IET Digital Library |
---|---|
Author | Garry, Joseph Landon Smith, Graeme Edward Baker, Christopher John |
Abstract | Doppler imaging is a technique that can generate fine two-dimensional (2D) imagery in the absence of large bandwidths. Radar imaging has traditionally consisted of combining wide bandwidth waveforms with aperture synthesis. Wide bandwidth waveforms provide high resolution in down-range (line-of-sight), whereas aperture synthesis enables high resolution in the orthogonal direction. However, in today’s increasingly congested spectral environment, using wide bandwidths waveforms is becoming less and less attractive. Consequently, imaging techniques that require only narrow bandwidth waveforms offer very attractive and practical advantages. An approach, examined here, is to use phase in conjunction with aperture synthesis to achieve high resolution in down-range while using narrowband waveforms. This method has the added benefit of using the same collection geometry as traditional stripmap synthetic aperture radar imaging. Therefore Doppler imaging is compatible with use in spectrally congested environments where wide bandwidth waveforms might be prohibited. In this study, the basic Doppler imaging concept is explained, a simple framework for its operation is introduced and resolution limits are examined. Results are presented from both simulations and full-scale experiments, which demonstrate range resolutions as fine as 23 cm using an 8.9 GHz CW waveform and 2 m long synthetic aperture. |
Starting Page | 974 |
Ending Page | 983 |
Page Count | 10 |
ISSN | 17518784 |
Volume Number | 9 |
e-ISSN | 17518792 |
Issue Number | Issue 8, Oct (2015) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rsn/9/8 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2014.0417 |
Journal | IET Radar, Sonar & Navigation |
Publisher Date | 2015-04-27 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | 2D Imagery Aperture Synthesis Bandwidth Waveforms Bandwidths Waveforms Collection Geometry Congested Environments Doppler Radar Narrowband Waveform Optical, Image And Video Signal Processing Orthogonal Direction Radar Equipment Radar Imaging Spatial Resolution Imagery Spectral Environment Stripmap Doppler Imaging Stripmap Synthetic Aperture Radar Imaging Synthetic Aperture Radar System And Application |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
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 |
8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
Loading...
|