ISAR Tomography for Full-Polarimetric 3-D Radar Cross-Section Measurements

Wang, X. Y.; Dallmann, Thomas; Moch, R.; Heberling, Dirk

doi:10.1109/tap.2019.2896446

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…From the 3-D point cloud in Fig. 8 and the scattering matrix decomposition [5], [41] result in Fig. 9, we can know that the first scattering center is generated by the combined effect of the single-and double-bounces of the gun barrel joint.…”

Section: Table II Height Estimation Error Of the Marked Scattering Ce...mentioning

confidence: 99%

“…I N RECENT years, there is an increasing concern in 3-D synthetic aperture radar (SAR) or inverse SAR (ISAR) imaging [1]- [4], which is considered to be an extension of the traditional 2-D SAR or ISAR imaging techniques. By using 3-D imagery, scattering mechanisms on a complex radar target can be clearly presented and studied in 3-D space for further applications, such as exact scattering diagnosis and automatic target recognition [5], [6]. In this way, problems in 2-D SAR/ISAR images could be fundamentally overcome [7].…”

Section: Introductionmentioning

confidence: 99%

“…More recently, the use of SR-based tomography with fully polarimetric data has been investigated in [5] and [7]. Compared with the single polarization case, the fully polarimetric tomography can not only provide 3-D scattering features of targets but also the polarimetric information of each scattering center [17].…”

Section: Introductionmentioning

confidence: 99%

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A Fast ISAR Tomography Technique for Fully Polarimetric 3-D Imaging of Man-Made Targets

2022

IEEE Trans. Geosci. Remote Sensing

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The 3-D inverse synthetic aperture radar (ISAR) tomography is an enabling technique for applications such as the exact diagnosis of scattering mechanisms for complex targets. Nevertheless, current ISAR tomography solutions still suffer from problems such as the great computational complexity and optimal utilization of the signatures acquired from limited baselines. In this work, we propose a fast ISAR tomography technique for fully polarimetric 3-D imaging of man-made targets. A stack of 2-D complex-valued images with different baselines and polarizations is first obtained through a phase error calibration (PEC) process and graphic processing unit accelerated polarimetric filtered backprojection. A polarimetric state-space decomposition (P-SSD) algorithm is then developed which could provide joint 3-D reconstruction results with low computational complexity. Examples from both numerical multibaseline data for the Sandia laboratories implementation of cylinders (SLICY) benchmark model and the outdoor range dataset collected by the Georgia Tech Research Institute (GTRI) are presented to demonstrate the superior performance and the usefulness of the proposed technique.

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Section: Table II Height Estimation Error Of the Marked Scattering Ce...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Fast ISAR Tomography Technique for Fully Polarimetric 3-D Imaging of Man-Made Targets

2022

IEEE Trans. Geosci. Remote Sensing

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“…OLARIMETRIC scattering matrix (PSM) provides an exquisite description of the interaction between electromagnetic (EM) wave and radar target, which plays important roles in scattering diagnosis and target identification [1]- [2]. In practice, antenna crosstalk and channel imbalance distort the received signal in polarimetric radar systems which have to be solved through fully polarimetric calibration.…”

Section: Introductionmentioning

confidence: 99%

A New Quarter Concave Cylinder Linked Dihedral Reflector for Fully Polarimetric Calibration of Wideband Nonreciprocal Radar Systems

Liu

2023

IEEE Trans. Antennas Propagat.

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Traditionally, fully polarimetric calibration of a nonreciprocal radar system requires measurements of at least two passive calibrators, such as a dihedral corner reflector plus a metal plate or sphere, etc. Interchanging measurements of multiple calibrators results in not only higher complexity but also degraded uncertainty. In this work, a new polarimetric passive calibrator is proposed, which is designed as quarter concave cylinder linked dihedral (QCCLD). The backscattering of a single QCCLD contains both depolarizing and nondepolarizing components when rotating along the radar line of sight (LOS). This unique characteristic makes it an excellent polarimetric calibrator which allows fully polarimetric calibration of a nonreciprocal radar system by measuring just a single QCCLD. The theoretical polarimetric scattering matrix (PSM) is derived based on physical optics (PO). Using complex exponential (CE) model based parametric representation, a novel polarimetric calibration procedure is developed to suppress undesirable scattering components which degrade the calibration accuracy. Experimental calibration results are presented with the polarization isolation improvement of more than 15dB over 6 to 18 GHz frequency band, demonstrating the usefulness of the proposed QCCLD calibrator for fully polarimetric calibration of a wideband nonreciprocal radar system.

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“…In the literature, a few studies have dealt with polarimetric ISAR (Pol-ISAR) signatures of radar targets [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Applying Polarimetric Target Decomposition to 2D Turntable ISAR Imagery of a Complex Vehicle

Demirci

2022

International Journal of Antennas and Propagation

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The capabilities of polarimetric target decomposition in SAR-based ATR applications are investigated by using 2D turntable ISAR imagery of a T-72 tank. To characterize target’s anisotropic scattering properties, wide-angle case is considered through the employment of a distinct polarimetric analysis procedure based on angular averaging of the covariance matrix. The results of the application of the three types of coherent decomposition, that is, Pauli, Krogager, and Cameron decomposition, and one incoherent decomposition, that is, eigenvector/eigenvalue decomposition, are analyzed and compared in terms of the identification of the physical scattering mechanisms. The usefulness of the various secondary parameters, including orientation, symmetry, and entropy, is also discussed. It is found that Pauli and Krogager decomposition can be readily applied for quick discrimination between the odd- and even-bounce reflectors. For a more detailed description of scattering mechanisms, either the Cameron or eigenvector/eigenvalue decomposition can be employed since their classification images are shown to be mostly consistent with each other. The results demonstrate that the decomposition features can be effectively utilized in subsequent ATR processes.

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ISAR Tomography for Full-Polarimetric 3-D Radar Cross-Section Measurements

Cited by 9 publications

References 13 publications

A Fast ISAR Tomography Technique for Fully Polarimetric 3-D Imaging of Man-Made Targets

A Fast ISAR Tomography Technique for Fully Polarimetric 3-D Imaging of Man-Made Targets

A New Quarter Concave Cylinder Linked Dihedral Reflector for Fully Polarimetric Calibration of Wideband Nonreciprocal Radar Systems

Applying Polarimetric Target Decomposition to 2D Turntable ISAR Imagery of a Complex Vehicle

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