Comparison of micro‐Doppler signatures registered using RBM of helicopters and WSM of vehicles. Issue 11 (1st November 2019)

• Record Type: Journal Article
• Authors: Gong, Jiangkun; Yan, Jun; Li, Deren
• Is Part Of: IET radar, sonar & navigation. Volume 13:Issue 11(2019)
• Page Start: 1951
• Page End: 1955
• Publication Date: 2019-11-01
• Subjects: helicopters -- wheels -- Doppler radar -- radar signal processing -- blades -- jet engines -- search radar -- radar cross‐sections -- electromagnetic wave scattering -- rotors (mechanical); microDoppler signatures -- WSM -- jet engine modulation -- microDoppler features -- jet aircraft -- aerial targets -- rotating wheel spokes -- ground vehicles -- rotating rotor blades -- helicopter rotor blades -- mathematical model -- radar signal -- Ku‐band Doppler radar system -- radar echoes -- wheeled vehicle -- theoretical results -- experimental results -- rotor blade modulation phenomena -- JEM features -- surface surveillance radar -- JEM spectra -- recognition features; Signal processing -- Periodicals; Radar -- Periodicals; Sonar -- Periodicals; Electronics in navigation -- Periodicals; Navigation -- Periodicals; 621.3848
• DOI: 10.1049/iet-rsn.2019.0210
• Languages: English
• ISSNs: 1751-8784

Abstract

Abstract : Jet engine modulation (JEM) are micro‐Doppler features obtained from the radar data of aircraft, including jet aircraft and helicopters, and generally viewed as unique phenomenon suitable for identifying aerial targets. The authors demonstrate however, that JEM are not unique, and that the rotating wheel spokes on the wheels of ground vehicles produce a modulation similar to the rotating rotor blades of jet engines and helicopter rotor blades. They also develop a mathematical model to analyse the radar signal scattering mechanism of wheel spokes, and also employ a Ku‐band Doppler radar system to collect radar echoes from a wheeled vehicle and a helicopter. Both the theoretical and experimental results verify the existence of rotor blade modulation (RBM) phenomena from helicopters and wheel spoke modulation (WSM) phenomena from vehicles. Both RBM and WSM are similar to JEM features. This fact indicates that JEM is a necessary but insufficient condition for the identification of aerial targets, and additional recognition features inherent in surface surveillance radar are needed to distinguish the JEM spectra arising from aerial targets and ground vehicles.