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Kassam, "Synthetic aperture pulse-echo imaging with rectangular boundary arrays (acoustic imaging)," IEEE Transactions on Image Processing, vol. Rappaport, "3D whole body imaging for detecting explosive-related threats," IEEE Transactions on Antennas and Propagation, vol. Hall, "Three-dimensional millimeter-wave imaging for concealed weapon detection," IEEE Transactions on Microwave Theory and Techniques, vol.
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Guard, "Millimeter wave holographic imaging of concealed weapons," Proceedings of the IEEE, vol. Moreover, it is superior to the MIMO-range migration algorithm (MIMO-RMA) in compensating propagation loss and other performance indexes in the image reconstruction results. As demonstrated with numerical theoretical analysis and experimental results, the proposed method greatly reduces the computational load but ensures the quality of image reconstruction compared to the back-projection (BP) algorithm. During the image reconstruction process, the amplitude factor is considered for the compensation of signal propagation loss, and the final target image can be obtained by FFT/IFFT and coherent accumulation steps. The frequency-domain interpolation is avoided and only one-step spherical-wave decomposition is employed in this algorithm. In this article, an improved fast Fourier transform (FFT)–based millimeter-wave imaging algorithm with range compensation is presented, which can be used to reconstruct 3D images for near-field multiple-input multiple-output synthetic aperture radar (MIMO-SAR).