Results 11 to 20 of about 160,254 (245)

Method of calibrating modulation meter MI 2305

open access: yesVojnotehnički Glasnik, 2000
In this article an original way of calibrating the MI 2305 modulation meter is described. AM traceability is achieved using tree secondary etalons. FM traceability calibrating is achieved by using the Bessel zero method.
Milovan Unković
doaj   +1 more source

Reconfigurable Mach–Zehnder interferometer for dynamic modulations of spoof surface plasmon polaritons

open access: yesNanophotonics, 2021
We propose an ultrathin reconfigurable Mach–Zehnder interferometer (MZI) for realizing dynamic frequency and amplitude modulations of spoof surface plasmon (SSP) signal.
Cui Wen Yi   +3 more
doaj   +1 more source

Autodyne Sensor Signals with Amplitude-Frequency Modulation of Radiation

open access: yesSensors, 2020
A mathematical model of an autodyne oscillator with a combined amplitude-frequency modulation, which is under the influence of its own radiation reflected from the target, is developed.
Vladislav Noskov   +4 more
doaj   +1 more source

Amplify–Quantize–Forward Relay Channel With Quadrature Amplitude Modulation

open access: yesIEEE Access, 2022
This paper considers an amplify–quantize–forward (AQF) relay channel with $M$ -ary quadrature amplitude modulation, where the relay implements a uniform quantization for the amplified received signal and forwards it to the destination. Two
Xianglan Jin
doaj   +1 more source

Modulator-free quadrature amplitude modulation signal synthesis [PDF]

open access: yesNature Communications, 2014
AbstractThe ability to generate high-speed on–off-keyed telecommunication signals by directly modulating a semiconductor laser’s drive current was one of the most exciting prospective applications of the nascent field of laser technology throughout the 1960s.
Liu, Zhixin   +6 more
openaire   +6 more sources

Coherent amplitude modulation of electron-beam-driven Langmuir waves [PDF]

open access: yesAnnales Geophysicae, 2013
A linear approach to the phenomenon of irregular amplitude modulation of beam-driven Langmuir waves, developed in a previous paper, is extended to explain periodic modulation as well.
K. Baumgärtel
doaj   +1 more source

Amplitude Modulation to Phase Modulation Conversion in Photonic Bandpass Sampling Link

open access: yesIEEE Photonics Journal, 2021
The photonic bandpass sampling has been proved to be potential in multi-carrier communication, frequency-agile coherent radar, compressive sensing, etc.
Shanhong Guan   +4 more
doaj   +1 more source

Amplitude Control Method of Magnetic Flux Vertical Modulation Structure for TMR Magnetic Sensor Based on Harmonic Component of Modulated Signal

open access: yesMicromachines, 2021
Magnetic flux vertical modulation method based on piezoelectric resonance can reduce the 1/f noise of tunnel magnetoresistance (TMR) magnetic sensor and significantly improves the low-frequency magnetic field detectivity. However, the amplitude variation
Junsheng Zhang   +7 more
doaj   +1 more source

Method for assessing the amplitude modulation of the stationary planetary waves [PDF]

open access: yesAnnales Geophysicae, 2009
This short-communication presents a new method for assessing the amplitude modulation of the stationary planetary waves (SPWs). The suggested procedure allows estimating the contribution of the amplitude modulated SPWs to the field of the zonally ...
P. Mukhtarov, D. Pancheva, B. Andonov
doaj   +1 more source

Amplitude modulation of radiation by coupled resonators

open access: yesДоклады Белорусского государственного университета информатики и радиоэлектроники, 2020
In this paper, we describe a method that allows one to realize highly efficient amplitude modulation of radiation at the output of electro-optical laser switches with two coupled resonators, in which electro-optical elements are located both in two split
A. I. Kanojka
doaj   +1 more source

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