Xin Sun

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In through-the-wall imaging, the three-dimensional (3D)imaging results are much more efficient in detecting and identifying targets than two-dimensional imaging results. To getting the high-quality imaging results, the 3-D BP imaging method is adapted and the crucial problem about the signal propagation delay is rigorously derived. Based on the derivation(More)
In through-the-wall imaging, the clutter, because of its great energy, has great effect on the detection of the targets. For the purpose of clutter suppression, factor analysis method has been studied and applied to TWI data. Besides, a new evaluation criterion, image contrast, for demonstrating the suppression performance is introduced. Compared to the(More)
A medium Mn steel has been designed to achieve an excellent combination of strength and ductility based on the TRIP (Transformation Induced Plasticity) concept for automotive applications. Following six passes of hot rolling at 850 °C, the Fe-7.9Mn-0.14Si-0.05Al-0.07C (wt.%) steel was warm-rolled at 630 °C for seven passes and subsequently air cooled to(More)
—In through-the-wall radar imaging (TWRI), wall returns are often stronger than target returns, which make the targets behind walls invisible in the radar image. Spatial filtering that relies on the removal of the spatial zero-frequency components is a useful way for wall-clutter mitigation. Unfortunately, it applies to through-the-wall radar (TWR) with(More)
AD-MUSIC is introduced to near-field to investigate the bearing and range estimation for the mixed source localization of sinusoidal signal and LFM signal. Firstly, a near-field two-dimensional MUSIC method based on ambiguity function distribution is put forward. Further, a novel Root-MUSIC method which constructs two ambiguity function distribution(More)
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