1. Coherent detection method for maneuvering target with complex motions
- Author
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Tianxian Zhang, Guolong Cui, Zhi Sun, Xiaolong Li, and Lingjiang Kong
- Subjects
coherent detection method ,Computer science ,Energy Engineering and Power Technology ,Motion (geometry) ,fourier transforms ,complex motions ,Compensation (engineering) ,first-order rcm ,symbols.namesake ,estimated defined velocity ,Range (statistics) ,Doppler spread ,transforms ,matched filters ,coherent integration process ,third-order rcm ,General Engineering ,Process (computing) ,jerk motion ,ci ,third-order keystone ,Function (mathematics) ,frequency-shifting cross-correlation function ,radar imaging ,Jerk ,Fourier transform ,lcsh:TA1-2040 ,symbols ,maneuvering target ,target tracking ,lcsh:Engineering (General). Civil engineering (General) ,Algorithm ,Software ,synthetic aperture radar ,velocity compensation function - Abstract
In this study, a coherent detection method is proposed to solve the problems during the coherent integration (CI) process, including the range cell migration (RCM) and Doppler spread (DS) effects which are caused by the complex motions of the maneuvering target. Particularly, this method applies the third-order keystone transform firstly, which could remove the third-order RCM induced by the jerk motion. Then target's defined velocity can be estimated by performing the frequency-shifting cross-correlation function and scaled Fourier transform. Thereafter, utilising the estimated defined velocity to construct a velocity compensation function, which could correct the first-order RCM (FRCM). Subsequently, the matched filtering process is performed to eliminate the second-order RCM and DS effects. Finally, applying the Fourier transform with respect to the slow time to realise the CI.
- Published
- 2019
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