Yongjun Zhao

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With the ability of multiresolution analysis and image decomposition, the wavelet transform has been employed to remote sensing image fusion. The multiresolution analysis of the discrete wavelet transform does not preserve the translation invariance, and the undecimated discrete wavelet transform can resolve the nonstationarity through suppressing the(More)
Satellite Tool Kit (abbr. STK) is a professional space-analysis software widely used in all phases of a space system’s life cycle. The simulation of STK is efficient and accurate relatively. Sometimes STK can not run efficiently. Maybe some other software can be used to make up. The problem of how to integrate applications with STK is faced during(More)
Polarimetric synthetic aperture radar (SAR) interferometry has been developed for the estimation of accurate terrain elevation and vegetation parameter. One of the important process steps is to estimate the interferometric phases of effective scattering centers which located in different height positions and represented different scattering mechanisms. The(More)
A reduced-rank (RR) space-time adaptive processing (STAP) method for simultaneous clutter plus jamming suppression in airborne multiple-input multiple-output (MIMO) radar is proposed. Firstly, the system parameters of MIMO radar STAP are utilized to construct the clutter subspace offline. Next, an auxiliary channel allocated with the matched filter(More)
With the increasing amount of car equipped with collision avoidance radar, the mutual interference is becoming a problem when the cars run in the roads. The mutual interference cancellation techniques are getting more and more important to preserve the reliability of the automotive radar. Considering conventional radar with frequency agile, this paper(More)
The target detection performance decreases in airborne multiple-input multiple-output (MIMO) radar space-time adaptive processing (STAP) when the training samples contaminated by interference-targets (outliers) signals are used to estimate the covariance matrix. To address this problem, a knowledge-aided (KA) generalized inner product non-homogeneity(More)
A cascaded reduced-dimension (RD) space-time adaptive processing (STAP) method for airborne multipleinput multiple-output (MIMO) radar in the presence of jammers is proposed in this paper. The proposed MIMOSTAP method for clutter plus jamming suppression proceeds in two steps. Firstly, the jamming is suppressed by its orthogonal complementary subspace(More)
Piecewise linear transformation is usually used to increase the contrast of image efficiently. It is most important to select division points during the processing course of piecewise linear transformation because these division points can decide the quality and efficiency of image enhancement. But the proper division points are usually selected after(More)