Results 11 to 20 of about 32,700,272 (303)

Evaluating Information Retrieval and Access Tasks

open access: yes, 2021
This open access book summarizes the first two decades of the NII Testbeds and Community for Information access Research (NTCIR). NTCIR is a series of evaluation forums run by a global team of researchers and hosted by the National Institute of ...

core   +1 more source

Photo-Generation of Tunable Microwave Carriers at 2 µm Wavelengths Using Double Sideband with Carrier Suppression Modulation

open access: yesApplied Sciences, 2022
At 2 µm wavelengths (149.9 THz), hollow-core photonics band gap fibers have higher light power damage thresholds, stable polarization states, and lower losses of 0.1 dB/km.
Di Ji   +4 more
doaj   +1 more source

Experimental Demonstration of Bidirectional OFDM/OQAM-MIMO Signal Over a Multicore Fiber System

open access: yesIEEE Photonics Journal, 2016
A bidirectional transmission and massive multi-input multi-output (MIMO) enabled radio over a multicore fiber system with centralized optical carrier delivery is experimentally investigated in this paper.
Jiale He   +7 more
doaj   +1 more source

Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices

open access: yesIEEE Access, 2022
Wireless local area network (WLAN)-based localization is key for advanced indoor Internet-of-Things and embedded sensor applications. To further improve the accuracy of indoor localization, attention has been focused on WLAN-based indoor localization ...
Takeru Fukushima   +5 more
doaj   +1 more source

Three-Dimensional Adaptive Modulation and Coding for DDO-OFDM Transmission System

open access: yesIEEE Photonics Journal, 2017
We propose a 3-D adaptive loading algorithm (ALA), which can individually allocate proper modulation formats, power levels, and the forward error correction codes to each orthogonal frequency division multiplexing (OFDM) subcarrier according to the ...
Xi Chen   +6 more
doaj   +1 more source

Access to Information in Belgium [PDF]

open access: yes, 2018
Prior to the Second World War, freedom of expression and freedom of the press were mainly seen from the view point of being an active right of the press to provide information without interference from the government. Since then there has been an evolution where freedom of information is also seen from the point of view of the recipient as a passive ...
Keunen, Stef, Van Garsse, Steven
openaire   +3 more sources

Joint Carrier Frequency Offset and Phase Noise Estimation Based on Pseudo-Pilot in CO-FBMC/OQAM System

open access: yesIEEE Photonics Journal, 2019
A simple method based on a designed pseudo-pilot is proposed for both carrier frequency offset (CFO) and phase noise (PN) estimation for the coherent optical offset-quadratic-amplitude modulation (QAM) based filterbank multicarrier (CO-FBMC/OQAM ...
Biyu You   +6 more
doaj   +1 more source

Optimization with Access to Auxiliary Information

open access: yesCoRR, 2022
Published in Transactions on Machine Learning Research (02/2024)
El Mahdi Chayti   +1 more
openaire   +3 more sources

Resource and Resource Sharing in Intelligent Information Access [PDF]

open access: yes, 2008
This paper reports an exploratory study on resources and resource sharing among researchers in Intelligent Information Access (IIA)
Chen, Jiangping, Li, Fei
core   +2 more sources

Quasi-Distributed Dual-Parameter Optical Fiber Sensor Based on Cascaded Microfiber Fabry–Perot Interferometers

open access: yesIEEE Photonics Journal, 2018
We propose and demonstrate a quasi-distributed fiber sensor based on cascaded microfiber Fabry–Perot interferometers (MFPIs) for simultaneous refractive index (RI) and temperature measurement.
Yang Xiang   +6 more
doaj   +1 more source

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