A UAV Airborne Passive Digital Radar for Aerial Surveillance

Gabard, B.; Casadebaig, L.; Deloues, Thierry; Amiez, Alexandre; Escalas, Pierre; Poullin, Dominique; Rabaste, Olivier; Jeuland, H.

doi:10.23919/eurad.2018.8546568

Cited by 5 publications

(6 citation statements)

References 4 publications

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“…Often, drone radars are specifically designed for UAVs, which are small enough and use little energy, as they receive it from batteries [22]. In some cases, only passive radars are used, which receive signals using FM broadcasting [23], VHF [24] or UHF [25] frequency bands. In order to use low-frequency bands (mostly FM bands) for passive radars, softwaredefined radio equipment or custom digital receivers combining a front-end digitizer and FPGA-based real-time data signal processing software are usually used.…”

Section: Introductionmentioning

confidence: 99%

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Hostile UAV Detection and Neutralization Using a UAV System

Rudys

Laučys

Ragulis

et al. 2022

Drones

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The technologies of Unmanned Aerial Vehicles (UAVs) have seen extremely rapid development in recent years. UAV technologies are being developed much faster than the means of their legislation. There have been many means of UAV detection and neutralization proposed in recent research; nonetheless, all of them have serious disadvantages. The essential problems in the detection of UAVs is the small size of UAVs, weak radio wave reflection, weak radio signal, and sound emitting. The main problem of conventional UAV countermeasures is the short detection and neutralization range. The authors propose the concept of the airborne counter-UAV platform (consisting of several vehicles) with radar. We use a low-cost marine radar with a high resolution 2 m wide antenna, embedded into the wing. Radar scanning is implemented by changing the heading of the aircraft. For the countermeasures, the authors suggest using a small rotorcraft UAV carried by a bigger fixed-wing one. A mathematical model that allows the calculation of the coordinates of the detected drone while scanning the environment in a moving UAV with radar was created. Furthermore, the results of integrated radar performance with a detected drone and the results of successful neutralization experiments of different UAVs were achieved.

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Section: Introductionmentioning

confidence: 99%

“…Our proposed idea is to integrate a radar into a UAV and turn the unmanned aircraft into a radar itself. A similar concept is more widely studied in [23]. However, our proposed case will scan the area in a 360-degree rotation like a conventional ground-based radar, thus leaving no blind spots.…”

Section: Introductionmentioning

confidence: 99%

Hostile UAV Detection and Neutralization Using a UAV System

Rudys

Laučys

Ragulis

et al. 2022

Drones

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“…In a previous paper [5] we described in details the technical design of the payloads, which is based on direct RF sampling and FPGA-based real time data signal processing. This approach has been selected to reduce size and energy consumption while guarantying a flexible and modular architecture.…”

Section: Introductionmentioning

confidence: 99%

“…The experiments described in [5] were based on the use of a fixed wing UAV with one embedded radar payload. Back then, the use of this type of carrier led to several difficulties.…”

Section: Introductionmentioning

confidence: 99%

Airborne Targets Detection by UAV-Embedded Passive Radar

Gabard

Wasik

Rabaste

et al. 2021

2020 17th European Radar Conference (EuRAD)

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“…This, together with the fact that the bandwidth of approximately 8 MHz provides a fair equivalent monostatic range resolution of approximately 20 m, makes DVB-T one of the most used illuminators for passive radar. As the passive radar system does not need to maintain a transmitter (thus being low-power) and due to the progress in hardware, which leads to miniaturization and more powerful systems, it becomes possible to mount the passive radar receivers on moving platforms, for example small boats or even unmanned aerial vehicles [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

A Three-Stage Inter-Channel Calibration Approach for Passive Radar on Moving Platforms Exploiting the Minimum Variance Power Spectrum

Wojaczek

Cristallini

O’Hagan

et al. 2020

Sensors

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Research in passive radar has moved its focus towards passive radar on moving platforms in recent years with the purpose of moving target indication and ground imaging via synthetic aperture radar. This is also fostered by the progress in hardware miniaturization, which alleviates the installation of the required hardware on moving platforms. Terrestrial transmitters, commonly known as illuminators of opportunity in the passive radar community, usually emit the signals in the Very High Frequency (VHF) or Ultra High Frequency (UHF) band. Due to the long wavelengths of the VHF/UHF band, there are constraints on the size of the used antenna elements, and therefore, the number of antenna elements to be employed is limited, especially as the platform carrying the passive radar system is intended to be small, potentially even an unmanned aerial vehicle. In order to detect moving targets hidden by Doppler shifted clutter returns, one common approach is to suppress the clutter returns by applying clutter suppression techniques that rely on spatial and temporal degrees of freedom, such as Displaced Phase Center Antenna (DPCA) or Space-Time Adaptive Processing. It has been shown that the DPCA approach is a meaningful technique to suppress the clutter if two antenna elements are employed. However, if the employed receiving channels are not carefully calibrated, the clutter suppression is shown to be not effective. Here, we suggest a three-stage calibration technique in order to perform the calibration of two receiving channels, which involves the exploitation of the direct signal, a data-adaptive amplitude calibration, and finally, a data-adaptive calibration of phase mismatches between both receiving channels by the estimation of the Minimum Variance Power Spectrum of the clutter. The validity of the proposed approach is shown with simulated data and demonstrated on real data from a fast ground moving platform, showing improved clutter cancellation capabilities.

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A UAV Airborne Passive Digital Radar for Aerial Surveillance

Cited by 5 publications

References 4 publications

Hostile UAV Detection and Neutralization Using a UAV System

Hostile UAV Detection and Neutralization Using a UAV System

Airborne Targets Detection by UAV-Embedded Passive Radar

A Three-Stage Inter-Channel Calibration Approach for Passive Radar on Moving Platforms Exploiting the Minimum Variance Power Spectrum

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