Results 11 to 20 of about 46,146,015 (283)

Modulation techniques for data superposition on amplitude-modulated signals [PDF]

open access: yes, 1983
Double-sideband amplitude-modulation is widely used because of its simplicity in transmission and reception, but in a number of applications the inclusion of a data channel has become an additional requirement.
Al-Jalili, Yazan Othman Ahmad
core   +7 more sources

A Simple Carrier-Based Modulation for the SVM of the Matrix Converter [PDF]

open access: yes, 2013
Today, industry has not fully embraced the matrix converter solution. One important reason is its high control complexity. It is therefore relevant to propose a simpler but efficient modulation scheme, similar as three phase voltage source inverter ...
ARPILLIERE, Michel   +5 more
core   +1 more source

High-resolution digital holography utilized by the subpixel sampling method [PDF]

open access: yes, 2011
A novel (to our knowledge) approach for resolution improvement in digital holography is presented in this paper. The proposed method is based on recording the incoming interference field on a complementary metal-oxide semiconductor (CMOS) camera with ...
Fritzsche, Marco   +9 more
core   +1 more source

Spectral characterisation of shortened pulse position modulation format [PDF]

open access: yes, 2010
Shortened pulse position modulation (SPPM) is a new modulation format that has recently been proposed for underwater wireless optical communications. A full spectral characterisation of SPPM is considered and original expressions are presented, which ...
Cryan, R.A.
core   +1 more source

Spectral characterisation of nk pulse position modulation format [PDF]

open access: yes, 2005
nk pulse position modulation (PPM) is a new modulation format that has recently been proposed for the optical wireless channel. This Letter considers, for the first time, a full spectral characterisation of -PPM and presents original expressions, which
Cryan, R.A., Menon, M.
core   +1 more source

Experimental Investigation of Time-Stretch-Based Reservoir Computing with an Optical Input Mask [PDF]

open access: yesEPJ Web of Conferences, 2023
In this paper, we experimentally demonstrated a novel all-optical reservoir computer with an all optical input mask. The combination of the binary random masks and the time-stretched ultrashort pulses has increased the system’s classification performance.
Yue Yuanli   +3 more
doaj   +1 more source

Signal Modulation Recognition System Based on Different Signal Noise Rate Using Artificial Intelligent Approach

open access: yesJournal of Studies in Science and Engineering, 2022
Everyone has paid much attention to modulation-type recognition in the past few years. There are many ways to find the modulation type, but only a few good ways to deal with signals with a lot of noise.
Rasool F. Jader   +2 more
doaj   +1 more source

Digital modulation recognition based on discriminative restricted Boltzmann machine

open access: yesTongxin xuebao, 2021
In order to improve the performance of digital modulation recognition under high dynamic signal-to-noise ratio, a joint modulation recognition method based on high-order cumulant and discriminative restricted Boltzmann machine was proposed, which ...
Zhengquan LI   +5 more
doaj   +2 more sources

Research and Implementation of Natural Sampling SPWM Digital Method for Three-Level Inverter of Photovoltaic Power Generation System Based on FPGA

open access: yesIEEE Access, 2019
The digital method of natural sampling sinusoidal pulse width modulation (SPWM) is studied based on the characteristics of neutral point clamped three-level inverters of Photovoltaic power generation system. Based on field programmable gate array (FPGA),
Zhaoyan Zhang, Peiguang Wang
doaj   +1 more source

Generic approach for hierarchical modulation performance analysis: application to DVB-SH [PDF]

open access: yes, 2011
Broadcasting systems have to deal with channel diversity in order to offer the best rate to the users. Hierarchical modulation is a practical solution to provide several rates in function of the channel quality.
Amiot-Bazile, Caroline   +9 more
core   +1 more source

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