Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 22, Issue 10, Pages 2590-2594Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2023.3298331
Keywords
Fast array imaging; Fresnel region; subareas
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This letter proposes a wideband millimeter wave imaging algorithm that can directly process echo signals in the spatial-frequency domain. The method corrects bulk range cell migration separately in each subareas and performs image processing in the pseudopolar coordinate system, reducing data size and computation load for sparse multiple-input-multiple-output arrays. It also offers superior image quality for large scenes, which is validated through three-dimensional experiments.
The letter proposes a wideband millimeter wave imaging algorithm in the mid-range (Fresnel region) and provides detailed derivations. The method corrects the bulk range cell migration separately in each subareas, and performs the image processing in the pseudopolar coordinate system. The proposed method is capable of directly processing echo signals in the spatial-frequency domain for sparse multiple-input-multiple-output array, thereby reducing data size and computation load. Moreover, it offers superior image quality for large scenes. Validation is conducted through three-dimensional experiments.
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