Mid-Range Two-Dimensional Fast Imaging in Pseudopolar Coordinate Format for Wideband Array

Article Engineering, Electrical & Electronic

A Grating-Lobes Suppression Method for Wideband MIMO Millimeter-Wave Imaging Arrays

Wenrui Zhang et al.

Summary: This article proposes a new method to eliminate the first grating-lobe of wideband MIMO millimeter-wave imaging array. By utilizing the position shift phenomenon, the method achieves grating-lobe suppression without additional calculation. The proposed multiapodization (MA) method cuts off the shifted grating-lobes while maintaining resolution. The article also introduces a pixel search (PS) method to remove residual grating-lobes and verifies the effectiveness through simulations and experiments.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2023)

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Article Engineering, Electrical & Electronic

Terahertz 3-D Imaging for Non-Cooperative On-the-Move Whole Body by Scanning MIMO-Array-Based Gaussian Fan-Beam

Shiyou Wu et al.

Summary: This research proposes a novel terahertz 3-D imaging system that combines Gaussian-fan-beam scanning and multiple-input-multiple-output array to create real-time high-resolution radar images for personnel security screening. The effectiveness of the proposed imaging algorithm is validated through simulation and experimental results.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2022)

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Article Engineering, Electrical & Electronic

Cylindrical MIMO Array-Based Near-Field Microwave Imaging

Shiyong Li et al.

Summary: The paper presents a novel cylindrical sparse MIMO array topology for microwave/millimeter-wave imaging for concealed weapons detection, achieving fast sampling and providing more angular observations. Phase calibration and transformation are used for fast image reconstruction. Numerical simulations demonstrate performance improvement of the proposed technique.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2021)

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Article Engineering, Electrical & Electronic

MIMO-SAR 3-D Imaging Based on Range Wavenumber Decomposing

Guan Yang et al.

Summary: MIMO-SAR technology enables three-dimensional imaging in millimeter wave and terahertz band, and the proposed PSM algorithm achieves efficient image reconstruction in the wavenumber domain. Experimental results demonstrate high reconstruction accuracy of the algorithm.

IEEE SENSORS JOURNAL (2021)

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Article Geochemistry & Geophysics

A Fast Omega-K Algorithm for Near-Field 3-D Imaging of MIMO Synthetic Aperture Radar Data

Kai Tan

Summary: MIMO-SAR is increasingly studied and applied in sensing applications, but real-time operation with large-size data remains challenging. A fast imaging algorithm with low computational complexity and easy implementation has been developed to address this issue, achieving 3D near-range imaging.

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS (2021)

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Article Engineering, Electrical & Electronic

Efficient Phase Shift Migration for MIMO 2-D Imaging in Millimeter-Wave Band

Guan Yang et al.

Summary: A high-efficiency phase shift migration (PSM) image reconstruction algorithm was proposed to improve the imaging efficiency of MIMO systems. By reducing computational costs, high-precision real-time imaging can be achieved.

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS (2021)

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Article Engineering, Electrical & Electronic