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Multistatic Radar Imaging Algorithm Based on Nonuniform Fast Fourier Transform Method


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Multistatic Radar Imaging Algorithm Based on Nonuniform Fast Fourier Transform Method
WU HaoSU WeiminGU HongBO Chao
School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China
nonuniform fast Fourier transformpassive multistatic radarsimagingdirect Fourier reconstruction method
To solve the problem of the passive radar imaging based on narrowband external illuminators that can’t achieve an ideal resolution,this paper increases multiple external illuminators with different emission frequencies to achieve larger synthetic bandwidth.The relationship of Fourier transform between the scatter function and the collected data of receiving stations is deduced.A passive radar imaging algorithm based on the nonuniform fast Fourier transform is presented due to the fact that the collected data are nonuniform and sparse in the frequency domain.Numerical simulations show that compared with the direct Fourier reconstruction method,this algorithm has better imaging performances at the instant of small rotating angle in the area with dense civil illumination sources.


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Last Update: 2012-12-29