Efficient Near-Field Imaging Using Cylindrical MIMO Arrays

Li, Shiyong; Wang, Shuoguang; Amin, Moeness G.; Zhao, Guoqiang

doi:10.1109/taes.2021.3079555

Cited by 20 publications

(7 citation statements)

References 39 publications

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“…The proposed muti-plane MIMO array can offer a similar focusing performance to that of the cylindrical MIMO array according to the analysis in Section III.A. However, the cylindrical RMA [38] takes much time to process the data acquired by cylindrical MIMO array. In this subsection, we provide more comparisons of the proposed imaging algorithm with the approach presented in [38] in terms of resolution, peak-to-sidelobe level ratio (PSLR), and computation time.…”

Section: B Comparison Of the Proposed Array Scheme And The Cylindrica...mentioning

confidence: 97%

“…However, the cylindrical RMA [38] takes much time to process the data acquired by cylindrical MIMO array. In this subsection, we provide more comparisons of the proposed imaging algorithm with the approach presented in [38] in terms of resolution, peak-to-sidelobe level ratio (PSLR), and computation time. First, we discuss the computation efficiency of the both algorithms using the floating-point operations (FLOPs) [45].…”

Section: B Comparison Of the Proposed Array Scheme And The Cylindrica...mentioning

confidence: 99%

“…The most computationally intensive part of multiplane MIMO hybrid time-wavenumber domain algorithm is the time-domain coherent accumulation. The higher computation complexity of the cylindrical RMA is due to the matched filtering and interpolations [38]. Thus, the computational load of the proposed algorithm and the cylindrical RMA can be approximately estimated by their highest order of computational complexity.…”

Section: Operationsmentioning

confidence: 99%

“…However, this scheme takes a lot of time to acquire the data by moving the scanner manually. A cylindrical MIMO array topology without mechanical scanning was presented in [37], [38], which can offer large observation angles with respect to the target and save much time for data acquisition. However, the fabrication of a cylindrical MIMO array is more complicated than that of a planar one.…”

Section: Introductionmentioning

confidence: 99%

“…However, the fabrication of a cylindrical MIMO array is more complicated than that of a planar one. On the other hand, the proposed imaging algorithm in [38] for cylindrical MIMO array, named cylindrical range migration algorithm (cylindrical RMA), requires large memory usage and heavy computation burden due to the higher dimensional processing. Therefore, a novel more efficient imaging technique is in great demand to reconstruct the high resolution images of the target in the near-field.…”

Section: Introductionmentioning

confidence: 99%

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Near-Field Millimeter-Wave Imaging via Multi-Plane MIMO Arrays

Xing

Hoorfar

et al. 2023

IEEE Access

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Multiple-input multiple-output (MIMO) array-based millimeter-wave (MMW) imaging has broad application prospects in concealed weapons detection due to its capability of high resolution at a reasonable cost. This paper presents a novel multi-plane MIMO array topology for near-field MMW imaging. The multi-plane MIMO arrays can offer wider angular observations of the target under test than the traditional planar MIMO arrays. Although the cylindrical MIMO array can achieve similar focusing performance as the multi-plane one, the multi-plane MIMO arrays are much easier to fabricate since each subarray has the same structure as a planar one. In addition, to speed up the image reconstruction process, we propose a corresponding three-dimensional (3-D) imaging algorithm with hybrid processing in the time-domain and wavenumber-domain. The proposed algorithm is even more efficient than the wavenumber-domain algorithm for the cylindrical MIMO array that has the same scale as the proposed multi-plane array scheme, which clearly shows that the hybrid time-wavenumber domain processing can avoid the enormous computation burdens of higher dimensional processing of the wavenumber-domain MIMO imaging algorithms. Numerical simulations and experimental results are provided to demonstrate the superiority of the proposed multi-plane MIMO array imaging technique in comparison with the most commonly used arrays and algorithms.INDEX TERMS Multiple-input multiple-output (MIMO), multi-plane array, hybrid processing, timedomain, wavenumber-domain.

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Section: B Comparison Of the Proposed Array Scheme And The Cylindrica...mentioning

confidence: 97%

Section: B Comparison Of the Proposed Array Scheme And The Cylindrica...mentioning

confidence: 99%

Section: Operationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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