Results 191 to 200 of about 5,844 (217)

Human Action Categorization Using Ultrasound Micro-Doppler Signatures

2011
The spectrotemporal representation of an ultrasonar wave reflected by an object contains frequency shifts corresponding to the velocity of the object's moving parts, also known as the micro-Doppler signature. The present study describes how the micro-Doppler signature of human subjects, collected in two experiments, can be used to categorize the action
Dura-Bernal, S., Garreau, G., Andreou, C., Andreou, A., Georgiou, J., Wennekers, T., Denham, S., Dura-Bernal, S., Garreau, G., Andreou, C., Andreou, A., Georgiou, J., Wennekers, T., Denham, S.   +13 more
openaire   +2 more sources

Empirical mode decomposition of micro-doppler signature

IEEE International Radar Conference, 2005., 2005
Micro-Doppler induced by mechanical vibration or rotation of structures in a radar target is potentially useful for target detection, classification and recognition. In order to exploit the time-varying micro-Doppler signature, time frequency analysis techniques are used. However, they can not represent this useful information clearly all the time.
null Chengjie Cai, null Weixian Liu, J.S. Fu, null Lilong Lu   +3 more
openaire   +1 more source

Target classification based on micro-doppler signatures

IEEE International Radar Conference, 2005., 2005
In this paper, we propose a Gabor filtering method to extract localized micro-Doppler signatures represented in the time-frequency domain. The dimensionality of the extracted Gabor features is further reduced by using the principal component analysis (PCA) method.
null Jiajin Lei, null Chao Lu
openaire   +1 more source

Simulation of Micro-Doppler Signatures of Drones

2023 IEEE International Conference on Acoustics, Speech, and Signal Processing Workshops (ICASSPW), 2023
Megha Kataria, Brejesh Lall
openaire   +1 more source

Investigating Radar Micro-Doppler Signatures for Drone Payload Detection

2025 25th International Conference on Digital Signal Processing (DSP)
25th International Conference on Digital Signal Processing (DSP 2025), June 25-27, 2025, Pylos (Messinia, Southwest Peloponnese ...
Pant, Shashank, Manning, Max, Laliberte, Jeremy, Sevigny, Pascale, Rajan, Sreeraman, Balaji, Bhashyam   +5 more
openaire   +2 more sources

Sonar Micro-Doppler Signatures: Principles and Applications

2014
In this chapter we introduce the theory behind sonar micro-Doppler signatures and highlight advantages and disadvantages with respect to their radar counterpart. We present the results of two experimental trials carried out at (1) the U.S. Army Research Laboratory and (2) University College London in which sonar micro-Doppler signatures of personnel ...
Alessio Balleri, Asif Mehmood
openaire   +1 more source

Phenomenology of Radar Micro-Doppler Signatures

2014
In this chapter, we introduce mathematics of the micro-Doppler effect in radar, derive basic formulas of micro-Doppler shifts due to vibration, rotation, tumbling and conning, and extract micro-Doppler signatures using time-frequency analysis.
openaire   +1 more source

Micro-Doppler signatures for sensing micro-motion

2019
The micro-Doppler signature is a distinctive characteristic of micro-motion represented by intricate time-varying Doppler frequency modulations. It can be used to extract motion kinematic features for identifying an object of interest. In this Chapter, we introduce the micro-Doppler signature in radar and its applications for sensing micro-motion.
Victor C. Chen, William J. Miceli
openaire   +1 more source

Effect of Frequency on Micro-Doppler Signatures of a Helicopter

2019 International Conference on Advances in Big Data, Computing and Data Communication Systems (icABCD), 2019
Helicopters usually fly at considerably lower speeds as compared with fixed wing aircraft and the distinguishing features of helicopters are their main and tail rotors. The main rotors, constant altitude and speed can be used by radar, both to identify a target as a helicopter, and further can be used to get information about the helicopter type with ...
Vikas Agnihotri, Munish Sabharwal, Vinay Goyal   +2 more
openaire   +1 more source

Micro-Doppler Signatures of Helicopter Rotor Blades

2014
The work presented in this chapter has shown how to take advantage of the microDoppler features of the rotary parts of a helicopter. Traditionally, analysis of the amplitude variations of the target echo returns have been used in order to separate fixed wing and rotary wing aircraft.
Karl Erik Olsen, Terje Johnsen, Øystein Lie-Svendsen, Børge Torvik   +3 more
openaire   +1 more source