First experimental results on multi-angle DVB-S based passive ISAR exploiting multipolar data

Santi, Fabrizio; Pisciottano, Iole; Pastina, Debora; Cristallini, Diego

doi:10.1109/radarconf2147009.2021.9455209

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Previous investigations using BPA for passive ISAR assumed an exact knowledge of the target motion, [9], [19], [20]. Although the obtained results showed its potentials for passive ISAR imaging, the assumption of perfect knowledge of the target motion was clearly unrealistic.…”

Section: Introductionmentioning

confidence: 81%

“…Indeed, DVB-S spectrum is densely populated by multiple channels with little gaps, which can be combined to enhance the range resolution [8]. Moreover, signals with both horizontal and vertical polarizations states are available, thus providing further degrees-of-freedom to enrich the image's information space [9], [19].…”

Section: B Dvb-s Based Passive Isarmentioning

confidence: 99%

“…However, the RD algorithm provides its output in an image projection plane (IPP) which depends on the particular illumination and motion conditions. Therefore, RD is not suitable for the direct combination of images taken from a variety of bistatic geometries, which is a fruitful mean to overcome the inherent limitations of passive ISAR [14]- [16], [19].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, BPA is particularly suitable when comparing information acquired by different systems. This is the case when direct fusion/comparison of passive images taken from different aspect angles, [19], and/or exploiting multiple illuminators of opportunity, e.g., Digital Video Broadcasting-Terrestrial (DVB-T) and DVB-S [20], is conducted.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Rotational Motion Estimation Errors on Passive Bistatic ISAR Imaging via Backprojection Algorithm

Santi,

Pisciottano,

Cristallini

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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This work investigates the impact of motion estimation errors on passive inverse synthetic aperture radar (ISAR) images of rotating targets when back-projection algorithm (BPA) is employed to focus the data. Accurate target motion estimation can be quite challenging, especially in non-cooperative target scenarios. In these cases, BPA is applied under erroneous target kinematics information, entailing defocusing and distortions of the final image product. Starting from the evaluation of the image point spread function (PSF) and the resolution properties of the BPA image under ideally known target motion, it will be analytically shown as, at first order, the PSF under motion estimation errors is approximately a scaled and rotated version of the nominal one. Then, theoretical solutions to predict the location of the scatterers in the image will be provided to characterize in closed-form the distortion of the BPA plane. Numerical results under different use cases of practical interest are provided to analyze the level of accuracy required by the motion estimation task for a reliable focusing in the challenging passive radar scenario. Experimental results using both terrestrial and satellite signals of opportunity are also provided, showing the general validity of the approach in different passive ISAR systems. The present analysis is not limited to passive radars and it can be also applied to active bistatic radars having limited transmitted bandwidth.

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Section: Introductionmentioning

confidence: 81%

Section: B Dvb-s Based Passive Isarmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of Rotational Motion Estimation Errors on Passive Bistatic ISAR Imaging via Backprojection Algorithm

Santi,

Pisciottano,

Cristallini

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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“…In addition to the multiangle illumination with spatial diversity, these novel illuminators of opportunity also allow the application of polarimetric methods. Both the multiangle illumination and polarisation information may improve the target classification performance of the system [30].…”

Section: Capabilities and Challengesmentioning

confidence: 99%

Capabilities and challenges of passive radar systems based on broadband low‐Earth orbit communication satellites

Blazquez-Garcia

Cristallini

Ummenhofer

et al. 2023

IET Radar Sonar & Navi

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Recently, several constellations of broadband low‐Earth orbit communication satellites, such as Starlink or OneWeb, have started to be deployed to provide global internet access. Based on performed analyses, these emerging constellations are considered promising candidates as space‐based transmitters of opportunity for passive radar applications due to their advantageous characteristics in terms of global coverage, high bandwidth (i.e. better resolution), high received power on Earth surface (i.e. increased maximum range), predictable trajectory, and network density and robustness. However, they also pose certain challenges for the development of passive radar systems due to the necessity to track the satellites with a narrow beam reference antenna, their fast‐relative dynamics which induce range and Doppler migration, and the use of non‐standardised signals with little publicly available information, which in addition are not optimised for radar usage. In this article, these capabilities and challenges are analysed, putting a special focus on the estimation of the achievable performance and on the experimental characterisation of the transmitted signals. To this end, the proposed passive radar architectures and the first developed prototypes are also presented. Showing the potential capabilities of these emerging illuminators of opportunity, the authors aim to promote further development of this technology for multiple applications.

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Passive Radar: Past, Present, and Future Challenges

Colone

Filippini

Pastina

2023

IEEE Aerosp. Electron. Syst. Mag.

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First experimental results on multi-angle DVB-S based passive ISAR exploiting multipolar data

Cited by 6 publications

References 14 publications

Impact of Rotational Motion Estimation Errors on Passive Bistatic ISAR Imaging via Backprojection Algorithm

Impact of Rotational Motion Estimation Errors on Passive Bistatic ISAR Imaging via Backprojection Algorithm

Capabilities and challenges of passive radar systems based on broadband low‐Earth orbit communication satellites

Passive Radar: Past, Present, and Future Challenges

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