Results 51 to 60 of about 518,836 (208)

DDS-PLL Phase Shifter Architectures for Phased Arrays: Theory and Techniques

IEEE Access, 2019
The main purpose of this paper is to review the framework behind direct digital synthesizer phase-locked loops (DDS-PLLs), as well as to provide a set of novel techniques that can be used during the development and the deployment of phased arrays based ...
Giulio D'Amato, Gianfranco Avitabile, Giuseppe Coviello, Claudio Talarico   +3 more
doaj   +1 more source

Power System Stability Improvement through the Coordination of TCPS-based Damping Controller and Power System Stabilizer

Advances in Electrical and Computer Engineering, 2017
To guarantee the secure and reliable operations of power systems through the rapid damping of low-frequency electromechanical oscillations (LFEOs) is the ultimate objective of this study. This paper presents a coordination of a flexible AC transmission
ALI, M. A. S., MEHMOOD, K. K., KIM, C.-H.   +2 more
doaj   +1 more source

A Dynamic Hybrid Precoding Structure for mmWave Massive MIMO Systems [PDF]

International Journal of Information and Communication Technology Research
Due to the high-power consumption and complexity of fully digital baseband precoding, its implementation in massive millimeter-wave multiple-input multiple-output (MIMO) systems is not cost-efficient and practical; for this reason, hybrid precoding has ...
Amirreza Moradi, Kamal Mohamed-pour, Nasim Jafari Farsani   +2 more
doaj  

Design, Analysis, and Implementation of the Subdivision Interpolation Technique for the Grating Interferometric Micro-Displacement Sensor

Photonics
A high-resolution grating interferometric micro-displacement sensor utilizing the subdivision interpolation technique is proposed and experimentally demonstrated.
Jiuhui Tang, Haifeng Peng, Peng Yang, Shangzhou Guo, Wenqiang Sun, Li Jin, Kunyang Xie, Mengwei Li   +7 more
doaj   +1 more source

Fully Adaptive Clutter Suppression for Airborne Multichannel Phase Array Radar Using a Single A/D Converter

EURASIP Journal on Advances in Signal Processing, 2010
This study considers an airborne multichannel phase array radar consisting of an analog phase shifter on each channel, where the sum channel (output) is digitised using a single A/D converter.
Madurasinghe Dan, Shaw AndrewP
doaj  

A mmWave Transmitting Time Modulated Array Using Bespoke GaAs Integrated Circuits—Prototype Design and Laboratory Trials at 73 GHz

IEEE Open Journal of Antennas and Propagation
The prototype design and testing of an E band mmWave Time Modulated Array (TMA) is presented. The PCB based array has a 3 dB RF bandwidth of 71-73 GHz and a peak gain of −2 dBi on the first harmonic steered beam.
Edward A. Ball, Sumin David Joseph
doaj   +1 more source

Low-resolution phase shifter-based hybrid precoding for mmWave massive MIMO

EURASIP Journal on Wireless Communications and Networking
As the demand for high-capacity and energy-efficient wireless communications grows, the exploration of cost-effective and power-optimized hybrid digital-analog beamforming techniques for millimeter-wave massive MIMO systems has gained substantial ...
Yipu Yuan, Jung-Lang Yu, Yuzhuo Pan, Shiyan Zheng   +3 more
doaj   +1 more source

In-situ physical adjoint computing in multiple-scattering electromagnetic environments for wave control. [PDF]

Nat Commun
Guillamon J, Wang CZ, Lin Z, Kottos T.
europepmc   +1 more source

Amplitude- and Phase-Programmable Dual-Color Photonic Chip for High-Contrast Structured Illumination Microscopy. [PDF]

ACS Photonics
Maran P, Rajan A, Ceccarelli F, Osellame R, Paiè P, Candeo A, Bragheri F, Bassi A.   +7 more
europepmc   +1 more source

NEO-PGA: Nonvolatile electro-optically programmable gate array. [PDF]

Sci Adv
Chen R, Tang A, Dutta J, Tara V, Ye J, Fang Z, Majumdar A.   +6 more
europepmc   +1 more source