Radar multipath scattering from the composite model: Specular image modified model and ISAR imaging analysis

Chen, Bin; Tong, Chuangming

doi:10.1002/mmce.21956

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…At each instant, the position of the satellite and the user are considered, and the multi-ray propagation is computed based on the geometry and characteristics of the surfaces. The scattering model is based on radar cross sections [56] while the ground reflections are simulated through Snell's law [57]. The resulting propagation environment is a multi-ray model with short-lifespan reflections in an urban scenario.…”

Section: A Performance Under Challenging Multipath Conditionsmentioning

confidence: 99%

Flexible Metasignal Tracking: Architecture Robustness in Challenging PNT Scenarios

Nardin,

Dovis,

Zanier

et al. 2024

IEEE Trans. Aerosp. Electron. Syst.

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The idea of multichannel tracking is generally found in the Global Navigation Satellite System (GNSS) literature with a wideband approach. We further developed the concept to separately process two narrowband channels that are later combined in a dedicated delay-locked loop (DLL) in a virtual wideband fashion. To suit prospect evolution of positioning, navigation, and timing (PNT) technologies and GNSSs, we generalized the so-called meta-signal construction to the combination of components transmitted over the same bandwidth, thus expanding the range of candidate multichannel components and fostering efficient bandwidth exploitation and increased resiliency to harsh Doppler. These improvements are sustained by additional complexity at the receiver, whose robustness must be carefully assessed. The resulting architecture performance in presence of multipath and tracking noise is therefore characterized under the challenging conditions of modern GNSSs, focusing on a low earth orbit (LEO) PNT scenario. The technique can successfully bear the representative Doppler profiles and C/N 0 levels of the addressed scenarios achieving a large estimation noise reduction, even under challenging multipath conditions.

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Section: A Performance Under Challenging Multipath Conditionsmentioning

confidence: 99%

Flexible Metasignal Tracking: Architecture Robustness in Challenging PNT Scenarios

Nardin,

Dovis,

Zanier

et al. 2024

IEEE Trans. Aerosp. Electron. Syst.

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“…15,16 The facet-based weighted FPM (FWFPM) has the capability to analyze the multipath scattering from super-low altitude target above the environmental surface with larger roughness. In our research group, based on the WFPM, Peng et al have developed an extended source imaging method, 17 and Chen et al 18 have analyzed the effect of multipath scattering on inverse synthetic aperture radar. However, in actual detection process, the seeker's antenna beam would have a certain width.…”

Section: Introductionmentioning

confidence: 99%

Brewster effect of super‐low altitude target above terrestrial environments using modified facet‐based weighted four‐path model

Zou

Tong

Sun

et al. 2021

Int J RF Mic Comp-Aid Eng

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A modified facet‐based weighted four‐path model is presented to analyze the Brewster effect of super‐low altitude target above terrestrial environments. In this approach, the facet‐based weighted four‐path model (FWFPM) is established to simulate the mutual interactions between the super‐low altitude target and terrestrial environment. Gauss antenna radiation pattern is introduced to modify the FWFPM. The hybrid PO‐MEC method is applied, where the physical optics (PO) is utilized to calculate the scattering field from each facet, and the method of equivalent currents (MEC) is used to compute the scattering field from the edge structure. The validation of the proposed method is verified by the example of a super‐low altitude missile model above a rough surface. The Brewster effect of a super‐low altitude aircraft above diverse terrestrial environments is studied. Moreover, the influences of relative permittivity, the roughness of environment, and the target's height on Brewster angle have been analyzed in detail to provide some useful conclusions.

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Composite Electromagnetic Scattering and High-Resolution SAR Imaging of Multiple Targets above Rough Surface

Wang

Tong

et al. 2022

Remote Sensing

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Aiming at the high efficiency of composite electromagnetic scattering analysis and radar target detection and recognition utilizing high-range resolution profile (HRRP) characteristics and high-resolution synthetic aperture radar (SAR) images, a near-field modified iterative physical optics and facet-based two-scale model for analysis of composite electromagnetic scattering from multiple targets above rough surface have been presented. In this method, the coupling scattering of multiple targets is calculated by near-field iterative physical optics and the far-field scattering is calculated by the physical optics method. For the evaluation of the scattering of an electrically large sea surface, a slope cutoff probability distribution function is introduced in the two-scale model. Moreover, a fast imaging method is introduced based on the proposed hybrid electromagnetic scattering method. The numerical results show the effectiveness of the proposed method, which can generate backscattering data accurately and obtain high-resolution SAR images. It is concluded that the proposed method has the advantages of accurate computation and good recognition performance.

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Radar multipath scattering from the composite model: Specular image modified model and ISAR imaging analysis

Cited by 3 publications

References 13 publications

Flexible Metasignal Tracking: Architecture Robustness in Challenging PNT Scenarios

Flexible Metasignal Tracking: Architecture Robustness in Challenging PNT Scenarios

Brewster effect of super‐low altitude target above terrestrial environments using modified facet‐based weighted four‐path model

Composite Electromagnetic Scattering and High-Resolution SAR Imaging of Multiple Targets above Rough Surface

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