Results 211 to 220 of about 9,424 (256)
A new approach to diffraction modelling for line-of-sight (LOS) paths [PDF]
2015 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), 2015 In this paper, we present a new knife-edge diffraction method based on Bullington method for the terrestrial line-of-sight (LOS) paths. The diffraction loss of our new knife-edge diffraction method is compared with the results obtained from the Delta-Bullington method and the measurement data existing in the literature for sample fixed terrestrial ...
Ayhan Altintas
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Precoding for MIMO Systems in Line-Of-Sight (LOS) Environment
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007In line-of-sight (LOS) environments, the signal detection of multiple-input multiple-output (MIMO) systems becomes difficult because the correlation among channels becomes higher when the phase differences of direct paths are close to each other. In this paper, we propose a MIMO system with precoding to maximize the minimum distance (denoted hereafter ...
Kenichi Kobayashi 0002 +2 more
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MIMO Channel Capacity in an Indoor Line-Of-Sight (LOS) Environment
IEICE Transactions on Communications, 2005The effect of antenna correlation on the Multiple-Input Multiple-Output (MIMO) channel capacity in the real propagation environment is a topic of interest. In this paper, we present the results of a measurement campaign conducted in an indoor Line-Of-Sight (LOS) office environment.
Kei Sakaguchi +2 more
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Line of Sight (LoS) Underwater Wireless Optical Communication Based on LED
2018 9th International Symposium on Telecommunications (IST), 2018In this paper, we propose a communication system for an underwater environment based on the LED. Different modulation techniques examined under pure and coastal water. A BER analyzed to assess the system with a different situation. The simulation results indicate that a LED can be operated with a good received information quality under pure sea water ...
Mazin Ali A. Ali, Saad Khalid Rahi
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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
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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
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Pulse detection algorithm for line-of-sight (LOS) UWB ranging applications
IEEE Antennas and Wireless Propagation Letters, 2005This paper presents an algorithm for precise determination of the distance between a pair of transmitting and receiving antennas using FCC conforming ultra-wideband (UWB) pulses. Indoor line-of-sight (LOS) measurements up to 24 m were conducted at Research Technoplaza, Nanyang Technological University, Singapore.
Z.N. Low +4 more
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A statistical model for line-of-sight (LOS) factory radio channels
IEEE 39th Vehicular Technology Conference, 2003A statistical model, based on experimental data, is presented to characterize the multipath propagation medium in typical manufacturing environments. This model includes the statistics of multipath propagation characteristics for cases of light and heavy clutter in a factory where there is a direct path from transmitter to receiver.
P. Yegani, C.D. McGillem
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Channel Characteristics of Dynamic Off-Body Communications at 60 GHz Under Line-of-Sight (LOS) and Non-LOS Conditions [PDF]
IEEE Antennas and Wireless Propagation Letters, 2017 This letter investigates the first-order characteristics of dynamic off-body communications channels at 60 GHz. In particular, we have studied signal propagation from a chest-worn millimeter-wave transmitter as an adult male walked toward and then away from a hypothetical base station.
Seong Ki Yoo +2 more
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Performance of LED for line-of-sight (LoS) underwater wireless optical communication system
Journal of Optical Communications, 2020Abstract Underwater wireless optical communications (UWOC) recently emerge as a solution to the problem of underwater communication for link with a high data rate, low delay, safety, and high immunity. In this study, the line of sight (LoS) method based on LED used for UWOC with different modulation schemes.
Alaa G. Nasser, Mazin Ali A. Ali
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Performance Evaluation of Line of Sight (LoS) in Mobile Ad hoc Networks
2020The era of multimedia communication is a major part and partial of each and every user life each task now depends very much on the Internet. Line-of-sight is the biggest problem many are facing, while using Internet. In particular, the problem of mobile station tracking at various base stations is considered.
C. R. Chethan +2 more
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