Results 21 to 30 of about 69,939 (249)

Analysis of Non-Idealities in the Generation of Reconfigurable Sinc-Shaped Optical Nyquist Pulses

open access: yesIEEE Access, 2021
Optical sinc-shaped Nyquist pulses are widely used in microwave photonics, optical signal processing, and optical telecommunications due to their numerous advantages, like rectangular shape in the frequency domain, the orthogonality and the consequential
Souvaraj De   +4 more
doaj   +1 more source

A QoS monitoring system in a heterogeneous multi-domain DVB-H platform [PDF]

open access: yes, 2009
The MobileTV, IPTV, and DVB standards (DVB-H/T) have been defined to offer mobile users interactive multimedia services with quality of service (QoS) consistency analogous to TV services.
Centonza, A   +4 more
core   +1 more source

A Novel Combined System of Direction Estimation and Sound Zooming of Multiple Speakers [PDF]

open access: yes, 2015
This article presents a new system for estimation the direction of multiple speakers and zooming the sound of one of them at a time. The proposed system is a combination of two levels; namely, sound source direction estimation, and acoustic zooming.
Khaddour, H., Rund, F., Schimmel, J.
core   +2 more sources

Increasing Reliability on UAV Fading Scenarios

open access: yesIEEE Access, 2022
Unmanned aerial vehicles (UAVs) are the next technology to be incorporated into a telecommunications network to improve command and control on a large scale in both line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. However, there is still room
Joseanne Viana   +6 more
doaj   +1 more source

Energy-Efficient Massive MIMO Network

open access: yesTikrit Journal of Engineering Sciences, 2023
Massive Multiple-Input Multiple-Output (Massive MIMO) is widely regarded as a highly promising technology for the forthcoming generation of wireless systems.
Israa Hilme, Ayad Atiyah Abdulkafi
doaj   +1 more source

Analysis of cyclic delay diversity on DVB-H systems over spatially correlated channel [PDF]

open access: yes, 2007
The objective of this work is to research and analyze the performance of Cyclic Delay Diversity (CDD) with two transmit antenna on DVB-H systems operating in spatially correlated channel. It is shown in this paper that CDD can achieve desirable transmit
Bard, M   +4 more
core   +1 more source

Pilot-aided carrier synchronization using an approximate DCT-based phase noise model [PDF]

open access: yes, 2007
This contribution deals with phase noise estimation from pilot symbols. The phase noise process is approximated by an expansion of DCT basis functions containing only a few terms.
Bhatti, Jabran, Moeneclaey, Marc
core   +2 more sources

Data-derived iterative channel estimation with channel tracking for a mobile fourth generation wide area OFDM system [PDF]

open access: yes, 2003
In this paper an iterative channel estimation technique for a mobile fourth generation coherent orthogonal frequency division multiplexing (OFDM) system is proposed. Coherent detection dictates that a per-subband estimate of the frequency response of the
Dowler, ASH, McGeehan, JP, Nix, AR
core   +2 more sources

Optical interconnection networks based on microring resonators [PDF]

open access: yes, 2012
Optical microring resonators can be integrated on a chip to perform switching operations directly in the optical domain. Thus they become a building block to create switching elements in on-chip optical interconnection networks, which promise to overcome
Andrea Bianco   +17 more
core   +1 more source

Mobile Audiovisual Terminal: System Design and Subjective Testing in DECT and UMTS networks [PDF]

open access: yes, 2000
It is anticipated that there will shortly be a requirement for multimedia terminals that operate via mobile communications systems. This paper presents a functional specification for such a terminal operating at 32 kb/s in a digital European cordless
Cosmas, J, Gill, D, Pearmain, A
core   +1 more source

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