Results 11 to 20 of about 15,290 (259)

Forensic Investigation of MP3 Audio Recordings

open access: yesТеория и практика судебной экспертизы, 2020
Special aspects of MP3-recordings technical investigation are addressed. The following features of formation and research of MP3 phonograms are explained: traces of MP3 coding in time and spectral domain, special aspects of MP3-files structure analysis ...
A. G. Boyarov, I. S. Siparov
doaj   +1 more source

Performance analysis of wavelength multiplexed SAC OCDMA codes in beat noise mitigation in SAC OCDMA systems [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2013
In this paper we investigate the use of wavelength multiplexed spectral amplitude coding (WM SAC) codes in beat noise mitigation in coherent source SAC OCDMA systems.
Alhassan A. M.   +3 more
doaj   +1 more source

Spectral-Coding-Based Compressive Single-Pixel NIR Spectroscopy in the Sub-Millisecond Regime

open access: yesSensors, 2021
In this contribution, we present a high-speed, multiplex, grating spectrometer based on a spectral coding approach that is founded on principles of compressive sensing.
Paul Gattinger   +3 more
doaj   +1 more source

Code for spectral amplitude coding optical CDMAsystems

open access: yesElectronics Letters, 2000
A new code structure for spectral amplitude coding optical code division multiple access (CDMA) is proposed and analysed. It is shown that such codes can effectively suppress the intensity noise and in turn increase the number of active users and improve the bit error rate performance.
Xiang Zhou   +3 more
openaire   +1 more source

Enhanced Spectral Amplitude Coding OCDMA System Utilizing a Single Photodiode Detection

open access: yesApplied Sciences, 2018
In this paper, the performance of a spectral amplitude coding-optical code division multiple access (SAC-OCDMA) system is investigated utilizing a single photodiode (SPD) detection technique. The proposed system uses enhanced double weight (EDW) codes as
Somia A. Abd El-Mottaleb   +4 more
doaj   +1 more source

Implicit Label Number for Optical Packets in Label Switching Networks Based on Spectral Amplitude Coding and OCDM Path

open access: yesIEEE Photonics Journal, 2022
This paper presents an implicit labeling scheme where stacked spectral-amplitude-coding (SAC) labels are inscribed in multiple payload bits in the packet front.
Kai-Sheng Chen
doaj   +1 more source

New code structure for spectral amplitude coding in OCDMA system

open access: yesIEICE Electronics Express, 2007
A new code structure for spectral amplitude coding optical code division multiple access system based on Double Weight (DW) code families is proposed. The DW code has a fixed weight of two. Modified Double Weight (MDW) code possesses ideal cross-correlation properties and the weight can be any even number, which is grater than two.
Feras N. Hasoon   +3 more
openaire   +3 more sources

Assessment of Myoelectric Manifestations of Muscle Fatigue During Repetitive Isometric Voluntary Contraction in Boys Aged 12-14

open access: yesPhysical Education Theory and Methodology, 2021
Aim: To study the peculiarity of electromyography signal characteristics alternation using different sEMG parameters during repetitive voluntary isometric fatiguing contraction in adolescent boys.  Materials and methods. 12 subjects with height 148.75
Abir Samanta, Sabyasachi Mukherjee
doaj   +1 more source

Reducing BER of spectral-amplitude coding optical code-division multiple-access systems by single photodiode detection technique [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2013
In this paper, we present a single photodiode detection (SPD) technique for spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems.
Al-Khafaji H. M. R.   +4 more
doaj   +1 more source

The Application Research of Atmospheric Optical Communication in Joint Modulation Transmission System

open access: yesGuangtongxin yanjiu, 2021
Aiming at the demand of high spectrum efficiency and low bit error rate of Wireless Optical Communication (WOC) technology, a joint modulation method of Pulse Amplitude Modulation (PAM) and Pulse Position Modulation (PPM) is proposed.
Le-kun DENG   +3 more
doaj   +1 more source

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