Results 21 to 30 of about 62,016 (304)

Homodyne coherent detection of ASK and PSK signals performed by a subcarrier optical phase-locked loop [PDF]

, 2005
Optical transmission systems based on homodyne coherent detection of 2-ASK and pilot carrier 2-PSK signals have been implemented. ASK data has been transmitted at 2.5 Gbps, while 2.5 Gbps and 10 Gbps PSK systems have been tested.
S. Camatel, Ferrero, Valter, CAMATEL S, V. Ferrero, Camatel, S.   +4 more
core   +1 more source

GPS Receiver VFLL-Assisted PLL High Dynamic Weak Signal Tracking Based on a Maximum Likelihood Estimation

Applied Sciences, 2022
This paper proposes a GPS receiver vector frequency-locked loop-assisted phase-locked loop (VFAPLL) structure based on the maximum likelihood estimation (MLE) method for highly dynamic weak-signal scenarios. In this structure, the loop structure does not
Na Li, Shufang Zhang, Yi Jiang
doaj   +1 more source

Enhanced Single-phase Phase Locked Loop based on Complex-Coefficient Filter [PDF]

, 2022
Complex coefficient filters (CCFs) are widely used for phase-locked loop (PLL) in three-phase power systems, while its usage is largely sparse in the single-phase domain.
Gautam, Samir, Xiao, Weidong, Lu, Dylan Dah-Chuan, Ahmed, Hafiz, Lu, DDC, Gautam, S, Ahmad, Hafiz, Ahmed, H, Xiao, W   +8 more
core   +1 more source

Fully Digital Grid Synchronization Under Harmonics and Unbalanced Conditions

IEEE Access, 2019
For the grid-connected system, the unbalanced and harmonic components of three-phase grid voltage have a significant impact on the accuracy of grid synchronization.
Yu Bai, Xiaoqiang Guo, Baocheng Wang, Yongjian Li   +3 more
doaj   +1 more source

Design of all-digital phase-locked loop based on pipeline technology

Dianzi Jishu Yingyong, 2019
In order to improve the system of full digital phase-locked loop speed, reduce the power consumption of the system, and at the same time improve the dynamic performance and steady-state performance of phase-locked system,this paper proposes a full ...
Tian Fan, Yang Mengwei, Shan Changhong
doaj   +1 more source

Optical phase-locked loop for coherent detection optical receiver [PDF]

, 2004
Lette
Ferrero, Valter, Gaudino, Roberto, Poggiolini, Pierluigi, S. CAMATEL, Camatel, S.   +4 more
core   +1 more source

Frequency‐to‐voltage converter based dual‐loop phase‐locked loop with variable phase locking capability

Electronics Letters, 2022
A novel frequency‐to‐voltage converter based phase‐locked loop (PLL) is proposed to overcome the inability of a frequency‐to‐voltage converter based frequency‐locked loop to lock phase.
Z. M. Saifullah, Paul M. Furth, SriHarsh Pakala, Alejandro Roman‐Loera   +3 more
doaj   +1 more source

Techniques for automatic on chip closed loop transfer function monitoring for embedded charge pump phase locked loops. [PDF]

, 2003
Charge Pump Phase locked loops are used in a variety of applications, including on chip clock synthesis, symbol timing recovery for serial data streams, and generation of frequency agile high frequency carrier signals.
Burbidge, Martin J., Tijou, Jim, M.J. Burbidge, A. Richardson, Richardson, Andrew M. D., J. Tijou   +5 more
core   +1 more source

Research on frequency adaptive of fans based on harmonicextraction technology

Journal of Hebei University of Science and Technology, 2021
In order to solve the problem of voltage distortion and frequency fluctuation caused by harmonic interference of wind turbines which affects the stable operation of wind turbines connected to the grid,a frequency adaptive phase lock methodwas proposed ...
Xueyou ZHANG, Shan HE, Wenlong LI
doaj   +1 more source

Robust optical injection locking to a 250 MHz frequency comb without narrow-band optical pre-filtering [PDF]

, 2011
A semiconductor laser was injection locked to a single optical frequency comb mode with a dither-free phase locked loop.
Wu, D.S., David J. Richardson, Slavík, R., Marra, G., Richardson, D.J., Radan Slavik, Giuseppe Marra, David S. Wu   +7 more
core   +1 more source