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An Investigation of Rotary Drone HERM Line Spectrum under Manoeuvering Conditions

An Investigation of Rotary Drone HERM Line Spectrum under Manoeuvering Conditions

Authors :
Peter Klaer
Bhashyam Balaji
Pascale Sévigny
Sreeraman Rajan
P. C. Patnaik
Andi Huang
Shashank Pant
Source :
Sensors, Vol 20, Iss 5940, p 5940 (2020), Sensors, Volume 20, Issue 20, Sensors (Basel, Switzerland)
Publication Year :
2020
Publisher :
MDPI AG, 2020.

Abstract

Detecting and identifying drones is of great interest due to the proliferation of highly manoeuverable drones with on-board sensors of increasing sensing capabilities. In this paper, we investigate the use of radars for tackling this problem. In particular, we focus on the problem of detecting rotary drones and distinguishing between single-propeller and multi-propeller drones using a micro-Doppler analysis. Two different radars were used, an ultra wideband (UWB) continuous wave (CW) C-band radar and an automotive frequency modulated continuous wave (FMCW) W-band radar, to collect micro-Doppler signatures of the drones. By taking a closer look at HElicopter Rotor Modulation (HERM) lines, the spool and chopping lines are identified for the first time in the context of drones to determine the number of propeller blades. Furthermore, a new multi-frequency analysis method using HERM lines is developed, which allows the detection of propeller rotation rates (spool and chopping frequencies) of single and multi-propeller drones. Therefore, the presented method is a promising technique to aid in the classification of drones.

Details

ISSN :
14248220
Volume :
20
Database :
OpenAIRE
Journal :
Sensors
Accession number :
edsair.doi.dedup.....77e883d77794bf5765ce63c48c3af10a
Full Text :
https://doi.org/10.3390/s20205940