Results 1 to 10 of about 281,646 (345)

Human Micro-Doppler Frequency Estimation Approach for Doppler Radar

IEEE Access, 2018
Micro-Doppler frequency estimation is an important issue for radar target recognition. In this paper, a novel approach is proposed to accurately estimate the micro-Doppler frequencies of specific target scattering parts, which can be very promising in ...
Yipeng Ding, Chengxi Lei, Xuemei Xu, Kehui Sun, Ling Wang   +4 more
doaj   +3 more sources

Multi-Frequency Doppler Velocimetry Based on a Mode-Locked Distributed Bragg Reflector Laser [PDF]

Photonics, 2023
A differential multi-frequency laser Doppler velocimetry is demonstrated, utilizing the synchronized multimode of a mode-locked distributed Bragg reflector laser.
Hao Song, Dan Lu, Zhihao Zhang, Fei Guo, Daibing Zhou, Lingjuan Zhao   +5 more
doaj   +2 more sources

Analysis of Radar Doppler Signature from Human Data [PDF]

Radioengineering, 2014
This paper presents the results of time (autocorrelation) and time-frequency (spectrogram) analyses of radar signals returned from the moving human targets.
M. ANDRIĆ, D. BUJAKOVIĆ, B. BONDZULIĆ, S. SIMIĆ, B. ZRNIĆ   +4 more
doaj   +2 more sources

Enhancing the correlation between azimuth and Doppler frequency for speed estimation of nearby tangential targets [PDF]

Scientific Reports
With the development of intelligent transportation systems, traffic supervision radar with wide coverage plays a crucial role in traffic management and vehicle-road coordination.
Wenjie Li, Yuchen Luan, Zicheng Chai, Longyong Chen   +3 more
doaj   +2 more sources

High-frequency Doppler ultrasound flowmeter

Archives of Acoustics, 2014
This paper discusses a new Doppler device for measuring blood flow in small vessels. The ultrasound frequency applied is 20M Hz. Two different ultrasound probes were designed with transducer diameters of 0.9 mm and 1.6 mm. The transducers were located at
A. NOWICKI, W. SECOMSKI, P. KARŁOWICZ, G. ŁYPACEWICZ   +3 more
doaj   +1 more source

Sea Clutter Covariance Matrix Estimation and Its Application to Whitening Filter [PDF]

Journal of Electromagnetic Engineering and Science, 2021
The accurate estimation of clutter covariance matrix (CCM) is essential in designing a radar detector/filter to suppress sea clutter. This estimation might not be easily accomplished because of the scarcity of valid training vectors adjacent to the range
Sanghyun Choi, Hoongee Yang, Jimin Song, Hyeonmu Jeon, Jongmann Kim, Yongseek Chung   +5 more
doaj   +1 more source

Machine Learning Based Object Classification and Identification Scheme Using an Embedded Millimeter-Wave Radar Sensor

Sensors, 2021
A target’s movements and radar cross sections are the key parameters to consider when designing a radar sensor for a given application. This paper shows the feasibility and effectiveness of using 24 GHz radar built-in low-noise microwave amplifiers for ...
Homa Arab, Iman Ghaffari, Lydia Chioukh, Serioja Tatu, Steven Dufour   +4 more
doaj   +1 more source

3D Target Localization by Using Particle Filter with Passive Radar Having one Non-cooperative Transmitter and one Receiver

Journal of Communications Software and Systems, 2021
In a passive radar system, localizing a target in Cartesian space is achieved by using one of the following bistatic geometries: multiple non-cooperative transmitters with one receiver, one non-cooperative transmitter with multiple receivers, or one non ...
Anas Mahmoud Almanofi, Adnan Malki, Ali Kazem   +2 more
doaj   +1 more source

All-Optical Pulsed Signal Doppler Frequency Shift Measurement System

IEEE Photonics Journal, 2021
A simple and all-optical Doppler frequency shift (DFS) measurement system is presented. It is based on a dual-drive Mach Zehnder modulator (DDMZM) driven by a transmitted signal and an echo signal received by an antenna.
Chongjia Huang, Erwin H. W. Chan
doaj   +1 more source

A Radar Detection Method of Plasma-Sheath-Covered Target Based on the Improved Keystone Algorithm

Remote Sensing, 2022
The aerodynamic thermal ionization affects the re-entry target, and the surface will form a ‘plasma sheath (PSh).’ The PSh with fluid characteristics will produce relative motion with the re-entry target.
Bowen Bai, Yi Ding, Xiaoping Li, Yanming Liu   +3 more
doaj   +1 more source