Results 11 to 20 of about 716,764 (308)

Nonlinearity-compensation-free optical frequency domain reflectometry based on electrically-controlled optical frequency sweep

open access: yesJournal of Electronic Science and Technology, 2021
A nonlinearity-compensation-free optical frequency domain reflectometry (OFDR) scheme is proposed and experimentally demonstrated based on the electrically-controlled optical frequency sweep.
Fan Yang   +4 more
doaj   +1 more source

Efficient enhancements in spectral domain method to speed up open planar circuit analysis [PDF]

open access: yes, 1998
The spectral domain method is a very fast and powerful technique to analyse planar microwave circuits. Available techniques for simulating the excitation of open planar microwave circuits are not very effective at relatively low frequencies.
Balik, HH, Railton, CJ
core   +2 more sources

A Sinusoidal Current Driver With an Extended Frequency Range and Multifrequency Operation for Bioimpedance Applications [PDF]

open access: yes, 2014
This paper describes an alternative sinusoidal current driver suitable for bioimpedance applications where high frequency operation is required. The circuit is based on a transconductor and provides current outputs with low phase error for frequencies ...
Demosthenous, A   +2 more
core   +1 more source

Frequency-Domain Q-Compensated Reverse Time Migration Using a Stabilization Scheme

open access: yesRemote Sensing, 2022
Seismic attenuation occurs during seismic wave propagation in a viscous medium, which will result in a poor image of subsurface structures. The attenuation compensation by directly amplifying the extrapolated wavefields may suffer from numerical ...
Xiong Ma   +4 more
doaj   +1 more source

Phase-coherent lightwave communications with frequency combs [PDF]

open access: yes, 2019
Fiber-optical networks are a crucial telecommunication infrastructure in society. Wavelength division multiplexing allows for transmitting parallel data streams over the fiber bandwidth, and coherent detection enables the use of sophisticated modulation ...
Andrekson, Peter A.   +7 more
core   +2 more sources

Single Miller frequency compensation: Three stage CMOS

open access: yesMemories - Materials, Devices, Circuits and Systems, 2023
A simple and efficient frequency compensation network is exploited for a three-stage amplifier. Single Miller capacitor at the output of a differential stage forms compensation network.
Ilghar Rezaei   +3 more
doaj   +1 more source

Universal fractional-order design of linear phase lead compensation multirate repetitive control for PWM inverters [PDF]

open access: yes, 2017
Repetitive control (RC) with linear phase lead compensation provides a simple but very effective control solution for any periodic signal with a known period.
Liu, Zhichao, Zhang, Bin, Zhou, Keliang
core   +1 more source

Voltage and frequency instability in large PV systems connected to weak power grid

open access: yesFrontiers in Energy Research, 2023
The voltage and frequency control of photovoltaic (PV) systems are influenced by coupled nonlinear factors. It has been discovered that frequency control stability is threatened by voltage regulation methods in PV systems.
Qianjin Zhang   +5 more
doaj   +1 more source

Hearing Characteristics and Doppler Shift Compensation in South Indian CF-FM Bats [PDF]

open access: yes, 1980
1. Echolocation pulses, Doppler shift compensation behaviour under laboratory conditions and frequency response characteristics of hearing were recorded inRhinolophus rouxi, Hipposideros speoris andHipposideros bicolor. 2.
A. Brosset   +13 more
core   +1 more source

A frequency offset compensation method based on all phase FFT amplitude

open access: yes物联网学报, 2022
Distance measurement is an important part of the wireless location technology.The ranging accuracy of millimeter wave based distance measurement depends on the frequency estimation accuracy of beat signals from the targets, but the existing frequency ...
Yingjie ZHU   +3 more
doaj   +2 more sources

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