NDLI: Fractional Fourier transform-based detection and delay time estimation of moving target in strong reverberation environment

Content Provider	IET Digital Library
Author	Yu, Ge Piao, Sheng chun Han, Xiao
Abstract	In ocean environments, reverberation is an inevitable interference for active sonar system. The reverberation has many characteristics quite similar to target echo, thus resulting in high false probability during active sonar detection. In this study, a novel method is proposed for both target detection and delay time estimation in environments experiencing strong reverberation. By utilising the focus characteristics of linear frequency modulated signal in fractional Fourier domain and Doppler shift of moving target, optimal transform angle of received signal is applied to detect targets based on fractional Fourier transform (FrFT). The authors have deduced a relationship among delay time, Doppler shift, and transform angle as the energy distribution in fraction Fourier domain is related with the delay time and Doppler shift of target echo. Simulation results have shown that the proposed method can achieve better performance with higher detection probability and lower root-mean-square errors in terms of delay time estimation under low signal-to-reverberation ratio environments as compared with match filter (MF). The experimental results have shown that multiple targets can be detected successfully. In addition, the accuracy of estimated delay time is even higher than MF in severe reverberant environment. It is pertinent to mention that reverberation may be suppressed by setting velocity threshold.
Starting Page	1367
Ending Page	1372
Page Count	6
ISSN	17518784
Volume Number	11
e-ISSN	17518792
Issue Number	Issue 9, Sep (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/11/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2016.0601
Journal	IET Radar, Sonar & Navigation
Publisher Date	2017-05-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acoustic Signal Processing Active Sonar Detection Delay Time Estimation Doppler Shift Electromagnetic Compatibility Fourier Transforms Fractional Fourier Transform-based Detection FrFT Function Theory And Analysis Integral Transforms Interference Interpolation And Function Approximation Linear Frequency Modulated Signal Match Filter Mean Square Error Method Numerical Analysis Radio Frequency Interference Reverberation Root-mean-square Error Signal Detection Sonar Detection Target Detection
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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

Target detection method using multipath information in an underwater waveguide environment

Robust direction of arrival estimation approach for unmanned aerial vehicles at low signal-to-noise ratios

Real-time parameter estimation for SAR moving target based on WVD slice and FrFT

TDOA/FDOA estimation method based on dechirp

Detection of high-speed and accelerated target based on the linear frequency modulation radar

Target Doppler estimation using wideband frequency modulated signals

Application of linear canonical transform correlation for detection of linear frequency modulated signals

Multi-frame fractional Fourier transform technique for moving target detection with space-based passive radar

Smart noise jamming suppression method based on fast fractional filtering

Fractional Fourier transform-based detection and delay time estimation of moving target in strong reverberation environment

Similar Documents

Target detection method using multipath information in an underwater waveguide environment

Robust direction of arrival estimation approach for unmanned aerial vehicles at low signal-to-noise ratios

Real-time parameter estimation for SAR moving target based on WVD slice and FrFT

TDOA/FDOA estimation method based on dechirp

Detection of high-speed and accelerated target based on the linear frequency modulation radar

Target Doppler estimation using wideband frequency modulated signals

Application of linear canonical transform correlation for detection of linear frequency modulated signals

Multi-frame fractional Fourier transform technique for moving target detection with space-based passive radar

Smart noise jamming suppression method based on fast fractional filtering

Fractional Fourier transform-based detection and delay time estimation of moving target in strong reverberation environment