Results 21 to 30 of about 940,971 (329)

Direct Antenna Modulation for High-Order Phase Shift Keying [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2020
An antenna capable of directly phase modulating a radio frequency carrier is discussed, designed, and measured as both an antenna and a modulator. Access point densification for the Internet of Things will be expensive in part due to the cost and inefficiency of amplifying waveforms with large peak-to-average power ratios for downlink transmission ...
Henthorn, S., Ford, K., O'Farrell, T.
openaire   +2 more sources

Controllable linear $\pi$-phase modulation in a thermal atom vapor without diffraction or absorption [PDF]

open access: yes, 2014
A scheme is proposed to achieve substantial controllable phase modulation for a probe field propagating through a thermal atomic vapor in double-$\Lambda$ configuration.
Evers, Jörg, Zhang, Lida
core   +3 more sources

Model Predictive Control With Triple Phase Shift Modulation for a Dual Active Bridge DC-DC Converter

open access: yesIEEE Access, 2021
A fast dynamic response is one of the key demands for the dual active bridge (DAB) dc-dc converter to achieve a well-regulated output voltage over a wide range of operating conditions.
Seema Mir Akbar   +3 more
semanticscholar   +1 more source

Realization of an all-optical zero to π cross-phase modulation jump [PDF]

open access: yes, 2009
We report on the experimental demonstration of an all-optical π cross-phase modulation jump. By performing a preselection, an optically induced unitary transformation, and then a postselection on the polarization degree of freedom, the phase of the ...
Camacho, Ryan M.   +4 more
core   +2 more sources

A Time Difference Method for Measurement of Phase Shift between Distributed Feedback Laser Diode (DFB-LD) Output Wavelength and Intensity

open access: yesSensors, 2015
A time difference method to conveniently measure the phase shift between output wavelength and intensity of distributed feedback laser diodes (DFB-LDs) was proposed.
Yongning Liu   +5 more
doaj   +1 more source

Degradation of modulation and noise characteristics of semiconductor lasers after propagation in optical fiber due to a phase-shift induced by stimulated Brillouin scattering [PDF]

open access: yes, 1999
Here we demonstrate theoretically that stimulated Brillouin scattering (SBS) can induce a phase shift of the optical carrier relative to its sidebands due to the waveguiding effect of the optical fiber on the acoustic wave.
Peral, Eva, Yariv, Amnon
core   +1 more source

Quantum key distribution based on a Sagnac loop interferometer and polarization-insensitive phase modulators [PDF]

open access: yes, 2006
We present a design for a quantum key distribution(QKD) system in a Sagnac loop configuration, employing a novel phase modulation scheme based on frequency shift, and demonstrate stable BB84 QKD operation with high interference visibility and low quantum
Huang, Lei-Lei   +3 more
core   +2 more sources

Perancangan Sistem Modulator Binary Phase Shift Keying [PDF]

open access: yesTechné : Jurnal Ilmiah Elektroteknika, 2016
Sistem yang dibangun adalah sebuah modul sistem modulator BPSK (Binary Phase Shift Keying). Perangkat yang dibahas adalah modulator BPSK dengan frekuensi 10kHz-48kHz dan untuk transmisi secara nirkabel ditambahkan pemancar FM yang akan mentranslasikan sinyal pembawa pada frekuensi radio sebesar 80MHz.
Susilo, Deddy   +2 more
openaire   +3 more sources

PHASE SHIFT INFLUENCE RESEARCH OF THE REFERENCE OSCILLATOR SIGNAL ON THE OUTPUT SIGNAL IN HOMODYNE DEMODULATION SCHEME [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2015
Subject of Research. Important feature of homodyne demodulation method based on the arctangent function approach is the phase shift between the reference oscillator signal and the interference signal.
A. V. Volkov   +4 more
doaj   +1 more source

A Deep Q-Network based optimized modulation scheme for Dual-Active-Bridge converter to reduce the RMS current

open access: yesEnergy Reports, 2020
In order to reduce the conduction losses of the Dual-Active-Bridge (DAB) converter, this paper proposes an optimized modulation scheme based on deep reinforcement learning (DRL).
Yuanhong Tang   +6 more
doaj   +1 more source

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