Results 91 to 100 of about 5,323,059 (392)
Modal Theory of Phase‐Modulated and Frequency‐Shifting Ring Cavities
Advanced Photonics Research, EarlyView.We present a theoretical and experimental characterization of the optical modes of dispersionless ring cavities with phase modulators or frequency shifters. Their response to arbitrary modulation acts as a filter for phase‐modulated modes that determine the optical output of passive resonators and lasers. This provides a general framework for analyzing
Miguel Cuenca +2 more
wiley +1 more source
A Novel Waveform Design Method for Shift-Frequency Jamming Confirmation
International Journal of Antennas and Propagation, 2018 Shift-frequency jamming is generally used to form range false targets for ground-based early-warning radar systems; the frequency shift value of such interference is larger than the Doppler shift value of the moving target, and the key element to ...
Chang Zhou, Zhen-Bo Zhu, Zi-Yue Tang
doaj +1 more source
Versatile LDV burst simulator [PDF]
, 1978 A device for generating burst signals is reported that can be used to determine whether or not a laser Doppler velocimeter is operating properly. A high frequency signal which corresponds to the information frequency of the laser Doppler velocimeter is ...
Youngbluth, O., Jr.
core +1 more source
Advanced Photonics Research, EarlyView.Self‐mixing interferometry is a powerful technique that brings together the exceptional sensitivity of phase measurements with the unequalled simplicity of the self‐mix configuration based on modulation of the cavity field induced by the return from the target. According to the selected measurand, displacement or vibration, and to the analog of digital
Silvano Donati
wiley +1 more source
Научный вестник МГТУ ГА, 2016 Performance features of the frequency-locked loop in the close range zone used as a narrow-band filter, keeping track of the Doppler frequency, are analyzed.
V. A. Kovrigin
doaj
Advanced Robotics Research, EarlyView.Combining a biomimetic soft‐robot with deep‐learning data analytics sheds light on a unique peripheral dynamics seen in the biosonar system of bats: Bats modulate their ultrasonic biosonar signals upon emission as well as reception with variable, yet highly coordinated motion patterns of their noseleaves and pinnae.
Shuxin Zhang +4 more
wiley +1 more source
Електроніка та інформаційні технологіїBackground. The paper presented a method for estimating the Doppler factor of a received broadband pulse signal distorted by multiplicative interference with an a priori uncertain probability distribution.
Pavlo Kostenko +4 more
doaj +1 more source
A Quadruped Piezoelectric Ultrasonic Actuating Robot with Foot‐Leg‐Trunk‐Integrated Structure
Advanced Robotics Research, EarlyView.This study proposes a novel foot‐leg‐trunk‐integrated quadruped piezoelectric ultrasonic actuating robot with small size and lightweight. A hybrid vibration mode combining the first‐order out‐of‐plane bending vibration of the trunk and the first‐order horizontal bending vibration of driving legs is designed to generate elliptical trajectories at foot ...
Jie Deng +5 more
wiley +1 more source
Laser Doppler holographic microscopy in transmission: application to fish embryo imaging
, 2014 We have extended Laser Doppler holographic microscopy to transmission geometry. The technique is validated with living fish embryos imaged by a modified upright bio-microcope.
Alexandre, Daniel +2 more
core +3 more sources
Estimation of DOA and Doppler Frequency on Nonideal UCA
Chinese Journal of Aeronautics, 2004 AbstractThe problem of estimating direction of arrivals (DOA) and Doppler frequency for many sources is considered in the presence of general array errors (such as amplitude and phase error of sensors, setting position error of sensors). Adopting direct array manifold in a uniform circular array (UCA), the estimation of Doppler frequency can be ...
Yao-wu Shi +3 more
openaire +2 more sources