Results 1 to 10 of about 33,478 (266)

Analysis of Signal Processing Methods to Reject the DC Offset Contribution of Static Reflectors in FMCW Radar-Based Vital Signs Monitoring [PDF]

Sensors, 2022
Frequency-modulated continuous wave (FMCW) radars are currently being investigated for remote vital signs monitoring (measure of respiration and heart rates) as an innovative wireless solution for healthcare and ambient assisted living.
Marco Mercuri, Tom Torfs, Maxim Rykunov, Stefano Laureti, Marco Ricci, Felice Crupi   +5 more
doaj   +2 more sources

An AC voltage sensorless predictive current control method for grid-tied inverter with enhanced robustness against current DC offset [PDF]

Scientific Reports
Conventional AC voltage sensorless predictive current control methods for grid-tied inverter are often sensitive to current DC offset errors, resulting in worse control performance.
Guolin Zhang, Weidong Dong, Lingfeng Meng, Jinyuan Li, Jiqiang Wang   +4 more
doaj   +2 more sources

Quadrature Signal Generator with Improved Dc Offset Compensation

Advances in Electrical and Computer Engineering, 2021
In this paper a second order generalized integrator (SOGI) based quadrature signal generator (QSG) is proposed with the improved DC offset compensation parameter tuning procedure.
STOJIC, D.
doaj   +2 more sources

An Improved Delayed Signal Cancelation for Three-Phase Grid Synchronization with DC Offset Immunity

Energies, 2023
The presence of the DC components in the grid voltage adversely affects the performance of the synchronization unit, causing oscillatory and offset errors in the estimated grid information.
Issam A. Smadi, Ibrahem E. Atawi, Ammar A. Ibrahim   +2 more
doaj   +1 more source

Grid integration of multiple PV inverters with reduced number of interfacing transformers— A dedicated controller for elimination of DC current injection

Energy Reports, 2023
The injection of dc current offset into ac networks may impacted the lifespan of the distribution system equipment including isolation transformers and measurement devices and in serious event may cause equipment’s malfunction.
S.A. Azmi, G.P. Adam, B.W. Williams, N.A. Rahim, S.R.A. Rahim   +4 more
doaj   +1 more source

Suppression of dc‐offset current in ac‐link of dual‐active‐bridge dc‐dc converter based on triple‐phase‐shift optimal control

IET Power Electronics, 2023
When dual‐active‐bridge dc‐dc converter (DAB) with energy storage load operates in a wide voltage range and high dynamic condition, the mismatch of primary and secondary side voltages will lead to high current stress and loss, and the dc‐offset current ...
Qiang Ren, Sheng Ai, Wei Kang, Yapeng Jiang   +3 more
doaj   +1 more source

Modified Extended Complex Kalman Filter for DC Offset and Distortion Rejection in Grid-Tie Transformerless Converters

Applied Sciences, 2023
Proper operation of the grid-tie transformerless converters under unbalanced and distorted conditions entails a precise detection of the frequency and fundamental component of the grid voltage.
Mohammed El-Nagar, Khaled Ahmed, Eman Hamdan, Ayman S. Abdel-Khalik, Mostafa S. Hamad, Shehab Ahmed   +5 more
doaj   +1 more source

Adaptive Phasor Estimation Algorithm Based on a Least Squares Method

Energies, 2019
This paper proposes an adaptive phasor estimation algorithm based on a least square method that can suppress the adverse effect of an exponentially decreasing DC offset component in a phasor estimation process. The proposed algorithm is composed of three
Woo-Joong Kim, Soon-Ryul Nam, Sang-Hee Kang   +2 more
doaj   +1 more source

Complex-Valued Pipelined Chebyshev Functional Link Recurrent Neural Network for Joint Compensation of Wideband Transmitter Distortions and Impairments

IEEE Access, 2020
In this article, a novel digital predistortion (DPD) model based on complex-valued pipelined Chebyshev functional link recurrent neural network (CPCFLRNN) for joint compensation of wideband transmitter distortions and impairments is proposed.
Mingyu Li, Zhendong Cai, Yao Yao, Changzhi Xu, Yi Jin, Xuguang Wang   +5 more
doaj   +1 more source

Analgesia induced by anodal tDCS and high-frequency tRNS over the motor cortex: Immediate and sustained effects on pain perception

Brain Stimulation, 2021
Background: Many studies have shown effects of anodal transcranial direct current stimulation (a-tDCS) and high-frequency transcranial random noise stimulation (tRNS) on elevating cortical excitability. Moreover, tRNS with a direct current (DC)-offset is
Junjie Yao, Xiaoyun Li, Wenyun Zhang, Xinxin Lin, Xiaohan Lyu, Wutao Lou, Weiwei Peng   +6 more
doaj   +1 more source