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High cross-range resolution of forward-looking region is the key problem of radar imaging. This paper presents a multi-beam system to extend high resolution imaging domain based on the digital beamforming (DBF) technique. The Doppler bandwidth is increased in forward-looking direction while the symmetrical Doppler domain could be significant reduced. Then matched filter technique is employed to deal...
The low angular resolution of scanning radar limits the application in the forward-looking imaging field. This paper proposes the mixed method of truncated singular value decomposition (TSVD) with regularization l1 norm to achieve the angular super-resolution. First, the TSVD technique is applied to suppress the noise amplification and keep the main information of targets. Then the angular super-resolution...
This paper proposes a Doppler beam sharpening (DBS) imaging method to achieve the high azimuth resolution in the forward-squint region based on fast iterative adaptive approach (F-IAA). In conventional DBS imaging, fast Fourier transform (FFT) method is adopted to obtain the estimation of Doppler center frequencies of targets, but it suffers from the low resolution and high sidelobes. Though a weighted...
The deconvolution methods are the effective approaches to realize high cross-range resolution of real-beam scanning radar. However, the computational time of these algorithms cannot meet the real-time requirements of radar imaging, which is a key limitation to apply this technology into engineering application. In order to overcome this problem, we propose a parallel processing plan based on Graphics...
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