Results 11 to 20 of about 197,921 (309)

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   +7 more sources

Spectral Transmission Characteristics of Andvanced Amplitude Modulation Formats

open access: yesCommunications, 2013
In this paper we focus our attention on numerical investigation of high-order amplitude modulation format in single-channel transmission systems utilizing different kinds of optical fibers.
Daniel Benedikovic   +3 more
doaj   +2 more sources

Study on Amplitude Modulation Principle of Chaotic System

open access: yesComplexity, 2020
Exploring the amplitude modulation phenomenon of chaotic signal has become a subject of great concern in recent years. This paper mainly concentrates on the preliminary study on amplitude modulation principle of a chaotic system.
Jian-Rong Du   +4 more
doaj   +1 more source

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

Temporal modulation transfer functions in the European Starling (Sturnus vulgaris): II. Responses of auditory-nerve fibres [PDF]

open access: yes, 1995
The temporal resolution of cochlear-nerve fibres in the European starling was determined with sinusoidally amplitude-modulated noise stimuli similar to those previously used in a psychoacoustic study in this species (Klump and Okanoya, 1991).
Klump, Georg M.   +3 more
core   +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

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

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

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

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