Analysis of radar microdoppler signatures from experimental. In this report, the md effect is introduced and the mathematics of microdoppler signatures, induced by simple sinusoidal vibrations or rotations, is developed. Fourier independent component analysis of radar microdoppler. Doppler effect school of physics university of sydney. The modulation due to this vibration or rotation is referred to as the microdoppler md phenomenon. Phenomenon, model, and simulation study article pdf available in ieee transactions on aerospace and electronic systems 421. When, in addition to the constant doppler frequency shift induced by the bulk motion of a radar target, the target or any structure on the target undergoes micromotion dynamics, such as mechanical vibrations or rotations, the micromotion dynamics induce doppler. The doppler effect is the change in frequency wavelength of a wave detected by an.
Importance ranking of features for human micro doppler. Radar microdoppler signatures of drones and birds at kband and wband. Principles of velocity measurement by the doppler effect. Moreover, the micromotion of the body parts has seemingly been merged or. The doppler effect or the doppler shift is the change in frequency of a wave in relation to an. Figure 4 can help illustrate how the radar can combine range and doppler returns. Mechanical vibration or rotation of a target or structures on the target may induce additional frequency modulations on the returned radar signal which generate sidebands about the targets doppler frequency, called the microdoppler effect.
Microdoppler effect in linear frequency modulation signal radar. Radar microdoppler signatures of drones and birds at k. The main idea is to combine the data gathered by the micro phone array with a. Chen naval research laboratory fayin li shenshyang ho harry wechsler, fellow, ieee george mason university when, in addition to the constant doppler frequency shift induced by the bulk motion of a radar target, the target or any. The doppler frequency shift is determined by the wavelength of the electromagnetic wave and the relative velocity between the radar and the target. Pulsed doppler radar systems use pulse compression waveforms such as pseudonoise. This example introduces the basic concept of a microdoppler effect in the radar return of a target due to the rotation of that target.
To attempt to combine the advantages of the matched filter and. Microdoppler radar signatures for intelligent target. Microdoppler characteristics of radar targets 1st edition elsevier. The doppler effect is used in some types of radar, to measure the velocity of detected. The doppler frequency shift can be calculated as follows. Purchase microdoppler characteristics of radar targets 1st edition. Radar echo, doppler effect and radar detection in the.
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