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Open AccessArticle

A Method of Fast and Simultaneous Calibration of Many Mobile FMCW Radars Operating in a Network Anti-Drone System

1
Faculty of Civil and Environmental Engineering, Department of Geodesy, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
2
Faculty of Navigation and Naval Weapons, Polish Naval Academy, Smidowicza 69, 81-103 Gdynia, Poland
3
Faculty of Electrical Engineering, Mathematics & Computer Science, Department of Circuits and Systems, TU Delft, Mekelweg 4, 2628 CD Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(22), 2617; https://doi.org/10.3390/rs11222617
Received: 30 September 2019 / Revised: 2 November 2019 / Accepted: 7 November 2019 / Published: 8 November 2019
(This article belongs to the Special Issue Radar and Sonar Imaging and Processing)
A market for small drones is developing very fast. They are used for leisure activities and exploited in commercial applications. However, there is a growing concern for accidental or even criminal misuses of these platforms. Dangerous incidents with drones are appearing more often, and have caused many institutions to start thinking about anti-drone solutions. There are many cases when building stationary systems seems to be aimless since the high cost does not correspond with, for example, threat frequency. In such cases, mobile drone countermeasure systems seem to perfectly meet demands. In modern mobile solutions, frequency modulated continuous wave (FMCW) radars are frequently used as detectors. Proper cooperation of many radars demands their measurements to be brought to a common coordinate system—azimuths must be measured in the same direction (preferably the north). It requires calibration, understood as determining constant corrections to measured angles. The article presents the author's method of fast, simultaneous calibration of many mobile FMCW radars operating in a network. It was validated using 95,000 numerical tests. The results show that the proposed method significantly improves the north orientation of the radars throughout the whole range of the initial errors. Therefore, it can be successfully used in practical applications.
Keywords: Anti-drone systems; FMCW radars; drones detection; radars calibration Anti-drone systems; FMCW radars; drones detection; radars calibration
MDPI and ACS Style

Nowak, A.; Naus, K.; Maksimiuk, D. A Method of Fast and Simultaneous Calibration of Many Mobile FMCW Radars Operating in a Network Anti-Drone System. Remote Sens. 2019, 11, 2617.

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