Implementation of the Phase Shift Migration in MIMO-Sidelooking Imaging at Terahertz Band

Gao, Hang; Li, Chao; Zheng, Shuilin; Wu, Shiyou; Fang, Guangyou

doi:10.1109/jsen.2019.2925461

Cited by 25 publications

(20 citation statements)

References 30 publications

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“…The fundamental theory is based on the exploding reflector model [31], [32] in geophysics, in which all the targets are assumed to 'explode' at the time 0 t  and the 'exploded fields' propagate with velocity 2 c toward the receiver. The literature [30] pointed out that the explosion field of the 2-D imaging problem can be expressed as (1), (2), (3):…”

Section: A Exploding Reflector Model For Image Reconstructionmentioning

confidence: 99%

“…The traditional PSM algorithm records the exploded field in a monostatic array, which cannot be directly applied to the bistatic MIMO radar. In our previous work [30], based on the bistatic echo data, a reorganization method in the wavenumber domain was developed to derive the explode fields in the "equivalent frequencies" at time 0 t  . Finally, the PSM algorithm was successfully applied to imaging reconstruction in the bistatic MIMO array.…”

Section: A Exploding Reflector Model For Image Reconstructionmentioning

confidence: 99%

“…The 'exploding fields' derived from the bistatic imaging topology have the extrapolation property in r-coordinate [30]. That means, the 'exploding fields' at different distances jk r is the extrapolated phase shift factor of the PSM algorithm along the propagation direction of the electromagnetic wave.…”

Section: B Derivation Of the Enhanced Psm Algorithmmentioning

confidence: 99%

“…The detailed computation cost is shown in Table. I. In our previous work [30], the computational cost of the MIMO-PSM algorithm had been compared with the BP algorithm. In order to show the computational efficiency of the proposed algorithm, we compare it with the MIMO-PSM algorithm.…”

Section: E Computational Costmentioning

confidence: 99%

“…Considering the limitations of the RMA, in our previous work [3] [30], the phase shift migration algorithm originated from reflection seismology was firstly extended for the MIMO imaging scheme. MIMO-PSM algorithm based on the explosion reflection model was proposed for 2-D imaging and achieved imaging quality comparable to BP algorithm with imaging efficiency far faster than BP algorithm.…”

Section: Introductionmentioning

confidence: 99%

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Phase Shift Migration With SIMO Superposition for MIMO-Sidelooking Imaging at Terahertz Band

Yang

Gao

et al. 2020

IEEE Access

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In this paper, the enhanced phase shift migration (PSM) algorithm for multi-input-multioutput (MIMO) side-looking (SL) scheme was proposed for the 2-dimension (2D) fast image reconstruction in the terahertz (THz) band. By decomposing the MIMO imaging problem into a superposition of several single-input-multiple-output (SIMO) sub-arrays, the proposed algorithm can be applied to systems with randomly distributed transmitting array. By deriving and applying the modified phase shift factor and necessary phase compensation, zero-padding in the transmitting array and data reorganization in the spatialfrequency domain of the conventional wavenumber domain MIMO algorithm can be totally avoided, which will hopefully further reduce the amount of calculation. A comprehensive MIMO-SL-EPSM algorithm was established in the wavenumber domain. Proof-of-principle experiments in the 0.1-THz band were performed based on a MIMO-SL prototype system. The reconstructed images for different targets with high efficiency and quality demonstrate the theoretical results and the effectiveness of the proposed algorithm. INDEX TERMS multiple-input-multiple-output (MIMO), phase shift migration (PSM), terahertz (THz), image reconstruction algorithm.

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Section: A Exploding Reflector Model For Image Reconstructionmentioning

confidence: 99%

Section: A Exploding Reflector Model For Image Reconstructionmentioning

confidence: 99%

Section: B Derivation Of the Enhanced Psm Algorithmmentioning

confidence: 99%

Section: E Computational Costmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phase Shift Migration With SIMO Superposition for MIMO-Sidelooking Imaging at Terahertz Band

Yang

Gao

et al. 2020

IEEE Access

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A FFT-Based Millimeter-Wave Imaging Algorithm with Range Compensation for Near-Field MIMO-SAR

Chen

Yang

Deng

et al. 2021

J Infrared Milli Terahz Waves

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Study of the Extended Phase Shift Migration for Three-Dimensional MIMO-SAR Imaging in Terahertz Band

Gao

et al. 2020

IEEE Access

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In this paper, the extended phase shift migration (PSM) for three-dimensional (3-D) multiinput-multi-output synthetic aperture radar (MIMO-SAR) imaging in terahertz (THz) band was studied. Based on one-dimensional MIMO arrays combined with synthetic aperture scan along another dimension, MIMO-SAR imaging scheme allows the number of array elements to be greatly reduced compared with the two-dimensional (2-D) MIMO arrays. By analyzing the derived analytical expression of the scattered waves in the frequency-wavenumber domain, the MIMO-SAR data in a certain frequency is mapped to another frequency of the 'explode fields' of the monostatic form in accordance with a newly defined 3-D dispersion relations. By multiplying the modified phase shift terms in each frequency of 'explode fields', the 'explode fields' at different range planes can be reconstructed. Finally, the 'explode fields' at time t = 0 can be successfully derived to realize fast imaging reconstruction for MIMO-SAR, with great reduction on the time consuming as compared with the BP algorithm and better accuracy compared with the Stolt migration. Additionally, due to its iterative nature in the range direction, the proposed algorithm is more flexible in treating more complicated scenarios, such as the image reconstruction in the multi-layer medium. A bistatic prototype imager was designed for the proof-of-principle experiments in THz band. The 3-D imaging results of different targets and computational complexity were also given to demonstrate the good performance of the proposed algorithm for THz MIMO-SAR imaging. INDEX TERMS Terahertz (THz), three-dimensional imaging, multi-input-multi-output synthetic aperture radar (MIMO-SAR), phase shift.

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Implementation of the Phase Shift Migration in MIMO-Sidelooking Imaging at Terahertz Band

Cited by 25 publications

References 30 publications

Phase Shift Migration With SIMO Superposition for MIMO-Sidelooking Imaging at Terahertz Band

Phase Shift Migration With SIMO Superposition for MIMO-Sidelooking Imaging at Terahertz Band

A FFT-Based Millimeter-Wave Imaging Algorithm with Range Compensation for Near-Field MIMO-SAR

Study of the Extended Phase Shift Migration for Three-Dimensional MIMO-SAR Imaging in Terahertz Band

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