Results 31 to 40 of about 238,600 (293)

Broadband Signalling Explained [PDF]

open access: yes, 2001
From the Publisher: Broadband Signalling Explained is a comprehensive handbook. It introduces the basics and evolution of ATM (Asynchronous Transfer Mode) and provides an overview of the concepts of protocols and signalling. It identifies the standards and describes the international bodies responsible for producing them, including the ITU ...
openaire   +1 more source

High Coherence Mid-Infrared Dual Comb Spectroscopy Spanning 2.6 to 5.2 microns

open access: yes, 2017
Mid-infrared dual-comb spectroscopy has the potential to supplant conventional high-resolution Fourier transform spectroscopy in applications that require high resolution, accuracy, signal-to-noise ratio, and speed.
Baumann, Esther   +6 more
core   +1 more source

Physical-Layer Security Analysis over M-Distributed Fading Channels

open access: yesEntropy, 2019
In this paper, the physical layer security over the M-distributed fading channel is investigated. Initially, an exact expression of secrecy outage probability (SOP) is derived, which has an integral term. To get a closed-form expression, a lower bound of
Sheng-Hong Lin   +4 more
doaj   +1 more source

The Design of a Multifunctional Coding Transmitarray with Independent Manipulation of the Polarization States

open access: yesMicromachines
Manipulating orthogonally polarized waves independently in a single metasurface is pivotal. However, independently controlling the phase shifts of orthogonally polarized waves is difficult, especially in the same frequency bands.
Shunlan Zhang   +4 more
doaj   +1 more source

Broadband angle of arrival estimation methods in a polynomial matrix decomposition framework [PDF]

open access: yes, 2013
A large family of broadband angle of arrival estimation algorithms are based on the coherent signal subspace (CSS) method, whereby focussing matrices appropriately align covariance matrices across narrowband frequency bins.
Alrmah, Mohamed   +4 more
core   +1 more source

Four-wave mixing wavelength conversion efficiency in semiconductor traveling-wave amplifiers measured to 65 nm of wavelength shift [PDF]

open access: yes, 1994
The efficiency of broadband optical wavelength conversion by four-wave mixing in semiconductor traveling-wave amplifiers is measured for wavelength shifts up to 65 nm using a tandem amplifier geometry.
Miller, Barry I.   +4 more
core   +1 more source

Evaluation of in vitro toxicity of common phytochemicals included in weight loss supplements using 1H NMR spectroscopy

open access: yesFEBS Open Bio, EarlyView.
We investigated the toxicity of 12 active compounds commonly found in herbal weight loss supplements (WLS) using human liver and colon cell models. Epigallocatechin‐3‐gallate was the only compound showing significant toxicity. Metabolic profiling revealed protein degradation, disrupted energy and lipid metabolism suggesting that the inclusion of EGCG ...
Emily C. Davies   +3 more
wiley   +1 more source

Classification and Identification Method of Communication Radiation Source Feature Based on Softmax Regression [PDF]

open access: yesJisuanji gongcheng, 2018
According to the characteristics of the current communication source identification method needs not only the higher number of samples,and identification efficiency is low,recognition rate drop,this paper proposes a Softmax regression was applied to ...
LIU Yachong,TANG Zhiling
doaj  

ORTHOGONAL NOISE-LIKE SIGNAL SYMBOLS FOR BROADBAND CHANNEL PROTECTION [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2019
The paper deals with development and analysis of particular case in a complex protection for a channel where radio messages are exchanged on the basis of mutually orthogonal signal broadband characters and alphabets based on them.
A. Y. Grishentsev   +3 more
doaj   +1 more source

Design of a Digital Array Signal Processing System with Full Array Element

open access: yesRemote Sensing, 2023
For the application of a digital array signal processing system with a high sampling rate and large bandwidth, and considering the constraints of limited resources (performance, volume, power consumption, weight, etc.), this paper proposes a design and ...
Guoyao Xiao   +4 more
doaj   +1 more source

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