Results 21 to 30 of about 2,253,810 (318)

Optoelectronic transversal filter

open access: yesElectronics Letters, 1991
The development of a 1 GHz bandwidth, 15 tap transversal filter with optical fibre delays and controllable bipolar weights set with variable sensitivity GaAs metal–semiconductor–metal photodetectors is reported. The performance of the filter is demonstrated by configuring it as tunable bandpass filter.
B.E. Swekla, R.I. MacDonald
openaire   +1 more source

Stop Band Continuous Profile Filter in Empty Substrate Integrated Coaxial Line

open access: yesApplied Sciences, 2018
Substrate integrated waveguides reduce the losses and increase the quality factor of resonators in communication filters when compared with traditional planar technologies, while maintaining their low-cost and low-profile characteristics. Empty substrate
Darío Gómez   +4 more
doaj   +1 more source

UWB microstrip filter design using a time-domain technique [PDF]

open access: yes, 2005
A time-domain technique is proposed for ultra-wideband (UWB) microstrip-filter design. The design technique uses the reflection coefficient (S11) specified in the frequency domain. When the frequency response of the UWB filter is given, the response will
Bennett   +10 more
core   +1 more source

Research on filtering of electromagnetic measurement while drilling signal in underground coal mine

open access: yesGong-kuang zidonghua, 2019
In view of problems of slow convergence speed and long computation time existed in electromagnetic wireless measurement while drilling (EM-MWD) signals extracted by adaptive filtering least mean square algorithm and recursive least squares algorithm, a ...
KANG Houqing
doaj   +1 more source

High-order Radio Frequency Differentiation via Photonic Signal Processing with an Integrated Micro-resonator Kerr Optical Frequency Comb Source

open access: yes, 2017
We demonstrate the use of integrated micro-resonator based optical frequency comb sources as the basis for transversal filtering functions for microwave and radio frequency photonic filtering and advanced functions.Comment: 8 pages, 7 figures, 46 ...
Chu, Sai T.   +7 more
core   +1 more source

Asymmetric Turbo Code for Coded-Cooperative Wireless Communication Based on Matched Interleaver with Channel Estimation and Multi-Receive Antennas at the Destination [PDF]

open access: yesRadioengineering, 2017
This paper investigates the multiple relay coded-cooperation scheme based on asymmetric turbo code (ATC) with multiple receive antennas over Rayleigh block fading channels.
S. Mughal   +4 more
doaj  

Integrated Transversal Equalizers in High-Speed Fiber-Optic Systems [PDF]

open access: yes, 2003
Intersymbol interference (ISI) caused by intermodal dispersion in multimode fibers is the major limiting factor in the achievable data rate or transmission distance in high-speed multimode fiber-optic links for local area networks applications.
Gowda, Sudhir   +6 more
core  

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

open access: yesFEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo   +2 more
wiley   +1 more source

Tri-/Quad-/Quint-Band Bandpass Filters Based on Transversal Embedded Asymmetrical Square-Ring Resonator

open access: yesIEEE Access
This paper presents a series design method for tri-/quad-/and quint band bandpass filter (BPF) with multiple transmission zeros (TZs) based on an embedded asymmetrical square-ring resonator (ASRR).
Xiaohan Wan   +6 more
doaj   +1 more source

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