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This paper presents a newly invented multi-section auto-focus millimeter wave holography scheme by using a single frequency signal. Both simulation and demonstration results are provided and compared with conventional holography and wideband imaging. This new multi-section auto-focus holography scheme demonstrates much better imaging resolution than conventional holography, has the similar imaging...
A novel 2D imaging algorithm is presented for stepped-frequency radar imaging systems. By solving an optimization problem which enforces targets sparsity, a 2D image with better resolutions can be obtained by using the undersampled data through 2D — SL0 minimization algorithm. This method can greatly reduce the data amount at both frequencies and rotation angles. Imaging results from both simulated...
Millimeter-waves are nonionizing, readily penetrate common clothing material, and are reflected from the human body and any concealed items. In this paper, a 3-D imaging system is proposed. It works in W-band in order to achieve high resolution. The image reconstruction algorithm used to form a focused image at near field is based on spatial frequency domain, and process of algorithm is displayed...
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