NDLI: CLEAN-based coherent integration method for high-speed multi-targets detection

Content Provider	IET Digital Library
Author	Li, Xiaolong Kong, Lingjiang Cui, Guolong Yi, Wei
Abstract	Coherent integration for high-speed multi-targets detection is a challenging task in radar applications. First, range migration (RM) and Doppler frequency migration (DFM) induced by target's complex motions (i.e. high speed, acceleration, etc.) would result in serious integration performance loss. Second, if the scattering intensities of different targets differ significantly, the weak one would be shadowed by the strong target and makes it difficult to achieve the coherent accumulation for weak target. Existing methods either perform poorly or are too computationally expensive for coherent integration of high-speed manoeuvring targets. Two contributions are made towards addressing these limitations. First, a method based on keystone transform, fold factor phase term compensation and generalised dechirp process is proposed to remove the migrations (RM and DFM) and realise the coherent accumulation. Compared with the generalised Radon Fourier transform algorithm, the proposed method can avoid the blind speed sidelobe and has a much lower computational cost. Second, two CLEAN techniques based on sinc-like point spread function (PSF) and modified PSF are presented to eliminate the strong target's effect and highlight the weak ones. By this way, the coherent integration of strong target and weak ones can be achieved iteratively. Several simulations are provided to demonstrate the effectiveness.
Starting Page	1671
Ending Page	1682
Page Count	12
ISSN	17518784
Volume Number	10
e-ISSN	17518792
Issue Number	Issue 9, Dec (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/10/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2015.0653
Journal	IET Radar, Sonar & Navigation
Publisher Date	2016-04-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Blind Speed Sidelobe CLEAN-based Coherent Integration Method Doppler Frequency Migration Fold Factor Phase Term Compensation Generalised Dechirp Process High-speed Multitargets Detection Integral Transforms in Numerical Analysis Keystone Transform Object Detection Optical Transfer Function Optical, Image And Video Signal Processing Point Spread Function Radar Equipment Radar Signal Processing Radon Transforms Range Migration System And Application
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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