Results 171 to 180 of about 24,730 (232)
Some of the next articles are maybe not open access.
2016 International Conference on Circuit, Power and Computing Technologies (ICCPCT), 2016
This paper is written to convey the digital signal processing (DSP) issues experienced by wireless communication systems which are the limiting factors for enhanced spectral efficiency, link reliability and data rate, with respect to physical (PHY) layer and network throughput, latency and propagation delay pertaining to network layer for future ...
M. PremKumar +3 more
openaire +2 more sources
This paper is written to convey the digital signal processing (DSP) issues experienced by wireless communication systems which are the limiting factors for enhanced spectral efficiency, link reliability and data rate, with respect to physical (PHY) layer and network throughput, latency and propagation delay pertaining to network layer for future ...
M. PremKumar +3 more
openaire +2 more sources
A cooperative multi-hop location verification for Non Line Of Sight (NLOS) in VANET
2011 IEEE Wireless Communications and Networking Conference, 2011Localization and exchanged position information plays a big role in Vehicular Ad-Hoc Networks (VANET). Several network services and applications, such as safety messages, require location information. The data are exchanged between vehicles within their radio communication range.
Osama Abumansoor, Azzedine Boukerche
openaire +2 more sources
Mobile phone Camera Based Visible Light Communication Using Non-Line-of-Sight (NLOS) Link
2018 International Conference on Network Infrastructure and Digital Content (IC-NIDC), 2018Traditional mobile phone camera based visible light communication (VLC) mainly uses line-of-sight (LOS) link, whose performance will be seriously affected by the blooming effect of complementary metal-oxide-semiconductor (CMOS) camera. In this paper, we introduce a mobile phone camera based VLC using non-line-of-sight (NLOS) link. By using our proposed
Zhenshan Zhang +4 more
openaire +2 more sources
Characterization of non-line-of-sight (NLOS) bias via analysis of clutter topology
Proceedings of the 2012 IEEE/ION Position, Location and Navigation Symposium, 2012Clutter-prone environments are challenging for range-based localization, where distances between anchors and the unlocalised node are estimated using wireless technologies like radio, ultrasound, etc. This is so due to the incidence of Non-Line-Of-Sight (NLOS) distance measurements as the direct path between the two is occluded by the presence of ...
Muzammil Hussain +3 more
openaire +2 more sources
Novel Approach of Spoofing Attack in VANET Location Verification for Non-Line-of-Sight (NLOS)
2017Location verification of a vehicle in VANET under non-line-of-sight (NLOS) condition requires the questioned vehicle to be cooperatively located by questioner via another vehicle that has direct link with the vehicle in a state of NLOS condition. One of the challenges is to prove that the vehicle is physically located in a claimed position, and MHLVP ...
Babangida Zubairu
openaire +2 more sources
The Effects of Non-line of Sight (NLOS) Channel on a User with Varying Device Orientations
International ICST Conference on Ad Hoc Networks, 2019Recently, there has been a growing interest in visible light communications (VLC) for indoor communication to meet the ever-increasing data demands. Most of the studies have considered the line-of-sight (LOS) channel for VLC communication. However, the LOS gain is constrained as the user moves away from the transmitter (Tx) or his device experiences ...
Shakir Ullah +2 more
openaire +2 more sources
Simulation of NLOS (non-line-of-sight) 3D imaging system
AOPC 2017: Laser Components, Systems, and Applications, 2017This passage studies on theory and scene simulation of NLOS imaging. Based on math and physical properties, a simulation platform is built for a NLOS imaging system, including a femtosecond laser, a scanning galvo system, a lambertian surface, several hidden scenes, an ultrafast photodetector to transfer the intensity of laser echo signal to voltage ...
Jingjing Tan +3 more
openaire +1 more source
An evaluation of UWB localization under non line-of-sight (NLOS) propagation
2008 3rd International Symposium on Wireless Pervasive Computing, 2008In this paper we evaluate the statistical performances of the association of a low-complexity of the time of arrival (TOA) estimation algorithm and the location estimation algorithm in a non line-of-sight (NLOS) indoor environment. For that, we choose the time hopping (TH) code and pulse amplitude modulation (PAM) for ultra wideband (UWB) symbols and ...
Maali, Abdelmadjid +4 more
openaire +1 more source