NDLI: OFDM chirp radar for adaptive target detection in low grazing angle

Content Provider	IET Digital Library
Author	Nusenu, Shaddrack Yaw Chen, Hui Wang, Wen Qin
Abstract	Low-altitude target detection is of great importance in radar applications, especially for military radar to counter the targets penetrated from low grazing angles. However, it is a challenge to detect the targets in low grazing angle area due to severe multipath reflection effects. In this study, the authors propose orthogonal frequency division multiplexing (OFDM) chirp waveform for target detection in low grazing angle region. The OFDM chirp waveform has better peak-to-average-power ratio level and provides larger time–bandwidth product than that of conventional OFDM waveform, which is beneficial for target detection. Two different radar schemes, namely, OFDM chirp radar and OFDM chirp multiple-input multiple-output (MIMO) radar, are studied under the Earth's curvature geometry model with the consideration of realistic multipath reflection effects. The generalised likelihood ratio test algorithm is developed by jointly exploiting the advantages of OFDM chirp waveform and MIMO configuration in increased degrees of freedom. In addition, an adaptive algorithm is further applied to enhance the target detection performance. All proposed schemes are verified by numerical results.
Starting Page	613
Ending Page	619
Page Count	7
ISSN	17519675
Volume Number	12
e-ISSN	17519683
Issue Number	Issue 5, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/12/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2017.0329
Journal	IET Signal Processing
Publisher Date	2018-01-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Algorithm Adaptive Signal Detection Adaptive Target Detection Earth Curvature Geometry Model Generalised Likelihood Ratio Test Algorithm Low-altitude Target Detection Low-grazing Angle Area Military Radar MIMO Configuration MIMO Radar Multipath Reflection Effect OFDM Chirp MIMO Radar OFDM Chirp Multiple-input Multiple-output Radar OFDM Chirp Waveform OFDM Modulation Orthogonal Frequency Division Multiplexing Chirp Waveform Peak-to-average-power Ratio Level Radar Detection Radar Equipment Realistic Multipath Reflection Effect Signal Detection System And Application Time-bandwidth Product
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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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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