Results 31 to 40 of about 52,986 (291)
Sensors, 2021 In this paper, Computer Vision (CV) sensing technology based on Convolutional Neural Network (CNN) is introduced to process topographic maps for predicting wireless signal propagation models, which are applied in the field of forestry security monitoring.
Jialuan He +6 more
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Fading Characteristics of Wireless Channel on High-Speed Railway in Hilly Terrain Scenario
International Journal of Antennas and Propagation, 2013 This paper focuses on the fading characteristics of wireless channel on High-Speed Railway (HSR) in hilly terrain scenario. Due to the rapid speed, the fading characteristics of HSR channel are highly correlated with time or Transmit-Receive distance and
Fengyu Luan +4 more
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Measurement and analysis of underground ultra wide band signal path loss
Gong-kuang zidonghua, 2020 In view of problem that theoretical modeling and simulation experiment are mostly used in research of underground path loss characteristics of high -precision ultra wide band (UWB) signal, actual measurement research of UWB signal is less.
DOU Xueli +5 more
doaj +1 more source
Measurements and analysis of large-scale fading characteristics in curved subway tunnels at 920 MHz, 2400 MHz, and 5705 MHz [PDF]
, 2015 ave propagation characteristics in curved tunnels are of importance for designing reliable communications in subway systems. This paper presents the extensive propagation measurements conducted in two typical types of subway tunnels—traditional ...
Ai, Bo +9 more
core +2 more sources
Multi-Frequency Air-to-Ground Channel Measurements and Analysis for UAV Communication Systems
IEEE Access, 2020 In order to implement unmanned aerial vehicle (UAV)-based wireless communications, a better understanding of wireless channels and the corresponding channel characterizations are critical.
Zhuangzhuang Cui +4 more
doaj +1 more source
Large-Scale Fading Characteristics and Models for Vehicle-to-Pedestrian Channel at 5-GHz
IEEE Access, 2019 Vehicle-to-Pedestrian (V2P) communication is essential to enable a reliable collision avoidance system for vehicles and vulnerable road users (VRUs). In order to develop a reliable communication system accurate channel models are required.
Ibrahim Rashdan +4 more
doaj +1 more source
Gamma-shadowed two-ray with diffuse power composite fading model
Alexandria Engineering Journal, 2023 In this paper, a novel gamma-shadowed two-ray with diffuse power (GS-TWDP) composite fading model is proposed by assuming that the shadowing-caused mean power variations of the received signal, affected by TWDP multipath fading, are gamma distributed ...
Pamela Njemcevic, Almir Maric
doaj +1 more source
On the Utility of the Inverse Gamma Distribution in Modeling Composite Fading Channels [PDF]
, 2020 We introduce a general approach to characterize composite fading models based on inverse gamma (IG) shadowing. We first determine to what extent the IG distribution is an adequate choice for modeling shadow fading, by means of a comprehensive test with ...
López Martínez, Francisco Javier +1 more
core
The Fluctuating Beckmann Shadowed Fading Model
, 2022 <p>In this paper, the fundamental statistics of fluctuating Beckmann shadowed (FBS) fading model which is composite of fluctuating Beckmann (FB) and inverse Nakagami-$m$ distributions, are provided. Accordingly, a wide range of composite generalized fading distributions are obtained as special cases of the proposed distribution, such as, double ...
Hamed Al-Raweshidy +2 more
openaire +1 more source
Collaborative spectrum sensing optimisation algorithms for cognitive radio networks [PDF]
, 2010 The main challenge for a cognitive radio is to detect the existence of primary users reliably in order to minimise the interference to licensed communications. Hence, spectrum sensing is a most important requirement of a cognitive radio.
Arshad, Kamran +2 more
core +4 more sources