Results 21 to 30 of about 48,854 (319)

Performance analysis of dedicated short range communications technology and overview of the practicability for developing countries

open access: yesThe Journal of Engineering, 2015
Vehicular communication is a widely researched field and aims at developing technologies that may complement systems such as the advanced driver assistance systems.
Vandana Bassoo   +2 more
doaj   +1 more source

Joint Modulations of Electromagnetic Waves and Digital Signals on a Single Metasurface Platform to Reach Programmable Wireless Communications

open access: yesEngineering, 2022
In current wireless communication and electronic systems, digital signals and electromagnetic (EM) radiation are processed by different modules. Here, we propose a mechanism to fuse the modulation of digital signals and the manipulation of EM radiation ...
Xiang Wan   +12 more
doaj   +1 more source

Polynomial Manifold Interpolation for Direction Finding in the Presence of Mutual Coupling

open access: yesIEEE Access, 2019
Direction-of-arrival (DOA) estimation in the presence of mutual coupling among the antennas is an important problem in direction finding systems. To address the mutual coupling issue, a polynomial manifold interpolation approach is proposed in this paper.
Hongtao Duan   +4 more
doaj   +1 more source

Compact, Slotted, Printed Antennas for Dual-Band Communication in Future Wireless Sensor Networks

open access: yesInternational Journal of Antennas and Propagation, 2013
Inverted-F antennas (IFAs) are a primary choice to implement the radiating system of portable devices. A tried and tested idea can remain topical if proven useful in modern applications.
Constantine G. Kakoyiannis   +1 more
doaj   +1 more source

A Simulation Framework for Multiple-Antenna Terminals in 5G Massive MIMO Systems

open access: yesIEEE Access, 2017
The recent interest in massive multiple in multiple out (MIMO) has spurred intensive work on massive MIMO channel modeling in the contemporary literature. However, current models fail to take the characteristics of terminal antennas into account.
Erik L. Bengtsson   +5 more
doaj   +1 more source

Compact Printed Arrays with Embedded Coupling Mitigation for Energy-Efficient Wireless Sensor Networking

open access: yesInternational Journal of Antennas and Propagation, 2010
Wireless sensors emerged as narrowband, resource-constrained devices to provide monitoring services over a wide life span. Future applications of sensor networks are multimedia-driven and include sensor mobility.
Constantine G. Kakoyiannis   +1 more
doaj   +1 more source

A Framework for Automatic Web Service Discovery Based on Semantics and NLP Techniques

open access: yesAdvances in Multimedia, 2011
As a greater number of Web Services are made available today, automatic discovery is recognized as an important task. To promote the automation of service discovery, different semantic languages have been created that allow describing the functionality ...
Asma Adala, Nabil Tabbane, Sami Tabbane
doaj   +1 more source

Uporedni pregled standarda za digitalne tranking sisteme funkcionalnih mobilnih radio-veza / Comparative analysis of the standards for digital trunked mobile radio systems [PDF]

open access: yesVojnotehnički Glasnik, 2002
Za izgradnju funkcionalnih sistema mobilnih radio-veza danas se koriste tranking sistemi analognih i digitalnih mobilnih radio-veza. Zbog niza prednosti, tranking sistemi digitalnih mobilnih radio-veza sve vise potiskuju analogne tranking sisteme ...
Slađan Svrzić , Dragan Ćosović
doaj   +1 more source

Transparent settlement model between mobile network operator and mobile voice over Internet protocol operator

open access: yesThe Journal of Engineering, 2014
Advances in technology have enabled network-less mobile voice over internet protocol operator (MVoIPO) to offer data services (i.e. voice, text and video) to mobile network operator's (MNO's) subscribers through an application enabled on subscriber's ...
Luzango Pangani Mfupe   +2 more
doaj   +1 more source

Experimental Evaluations of TDD-Based Massive MIMO Deployment for Mobile Network Operators

open access: yesIEEE Access, 2020
Massive Multiple Input Multiple Output (MIMO) is an essential component for future wireless cellular networks. One of its biggest advantages is to use the 5G spectrum more intelligently by extending both coverage (via high gain adaptive beamforming) and ...
Engin Zeydan, Omer Dedeoglu, Yekta Turk
doaj   +1 more source

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