Monte-Carlo-based multiple-scattering channel modeling for non-line-of-sight ultraviolet communications

2011 ◽  
Author(s):  
Robert J. Drost ◽  
Terrence J. Moore ◽  
Brian M. Sadler
Keyword(s):  
Monte Carlo ◽  
Multiple Scattering ◽  
Channel Modeling ◽  
Line Of Sight ◽  
Non Line Of Sight

Performances of Non-Line-of-Sight Ultraviolet Multi-Scatter Propagation for Noncoplanar Geometries

2012 ◽  
Vol 571 ◽  
pp. 214-218
Author(s):  
Yi Nan Tang ◽  
Xiao Ping Xie ◽  
Wei Zhao
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Impulse Response ◽  
Mathematical Description ◽  
Pulse Width ◽  
Path Loss ◽  
Propagation Model ◽  
Line Of Sight ◽  
Non Line Of Sight

A multi-scatter propagation model based on Monte Carlo method is presented. This model can be applied to all the geometries, including coplanar or noncoplanar scenario. The mathematical description of this model is deduced. We obtain the spatial positions of photon with three Cartesian coordinates after each propagation step and the received judgment conditions. Employing a photon tracing technique, Monte Carlo simulation is performed to investigate the signal impulse response and the path loss. The results indicate that, when the off-axis angle increases, the amplitude of the impulse response decreases, while the path loss increases. In addition, it is observed that the pulse width increases with the off-axis angle.

scholarly journals Large-Scale Channel Modeling and Measurements for 10 GHz in Indoor Environments

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Iury S. Batalha ◽  
Andréia V. R. Lopes ◽  
Jasmine P. L. Araújo ◽  
Fabrício J. B. Barros ◽  
Bruno L. S. Castro ◽  
...  
Keyword(s):  
Large Scale ◽  
Channel Modeling ◽  
Directional Antennas ◽  
Measured Data ◽  
Comprehensive Analysis ◽  
Line Of Sight ◽  
Indoor Environments ◽  
Computer Engineering ◽  
Cross Polarization ◽  
Non Line Of Sight

With the advent of 5G mobile communication and researches into the propagation of large-scale channel modeling for frequencies above 6 GHz, measurement investigation was performed at 10 GHz with horn-type directional antennas in a corridor and a computer room within the Electrical and Computer Engineering Laboratories’ first floor, at Federal University of Pará (UFPA), Brazil. This paper presents data obtained through experimental work, channel modeling with co-polarization V-V and H-H and cross-polarization V-H in line-of-sight (LOS) or non-line-of-sight (NLOS) conditions. The large-scale close-in reference is sustained by a comprehensive analysis, considering propagation mechanisms such as reflection and diffraction. Results demonstrate that the established model had inferior standard deviation in relation to measured data, proving itself more significant to propagation in indoor environments.

scholarly journals A Localization and Tracking Approach in NLOS Environment Based on Distance and Angle Probability Model

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4438 ◽  
Author(s):  
Xin Tian ◽  
Guoliang Wei ◽  
Jianhua Wang ◽  
Dianchen Zhang
Keyword(s):  
Monte Carlo ◽  
Kalman Filtering ◽  
Probability Model ◽  
Likelihood Estimation ◽  
Line Of Sight ◽  
Extended Kalman Filtering ◽  
Optimal Position ◽  
Localization Accuracy ◽  
Localization And Tracking ◽  
Non Line Of Sight

In this paper, an optimization algorithm is presented based on a distance and angle probability model for indoor non-line-of-sight (NLOS) environments. By utilizing the sampling information, a distance and angle probability model is proposed so as to identify the NLOS propagation. Based on the established model, the maximum likelihood estimation (MLE) method is employed to reduce the error of distance in the NLOS propagation. In order to reduce the computational complexity, a modified Monte Carlo method is applied to search the optimal position of the target. Moreover, the extended Kalman filtering (EKF) algorithm is introduced to achieve localization. The simulation and experimental results show the effectiveness of the proposed algorithm in the improvement of localization accuracy.

Multiple Scattering Model and Simulation for Non-Line-of-Sight Communication

2011 ◽  
Vol 48 (7) ◽  
pp. 070102 ◽  
Author(s):  
宋超 Song Chao ◽  
徐智勇 Xu Zhiyong ◽  
汪井源 Wang Jingyuan
Keyword(s):  
Multiple Scattering ◽  
Line Of Sight ◽  
Scattering Model ◽  
Model And Simulation ◽  
Non Line Of Sight

scholarly journals Measurement-Based LoS/NLoS Channel Modeling for Hot-Spot Urban Scenarios in UMTS Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Jiajing Chen ◽  
Xuefeng Yin ◽  
Li Tian ◽  
Nan Zhang ◽  
Yongyu He ◽  
...  
Keyword(s):  
Hot Spot ◽  
Channel Modeling ◽  
Line Of Sight ◽  
Parameter Estimates ◽  
Deterministic Models ◽  
System A ◽  
Universal Mobile Telecommunications System ◽  
And Performance ◽  
Existence Probability ◽  
Non Line Of Sight

A measurement campaign is introduced for modeling radio channels with either line-of-sight (LoS) or non-line-of-sight (NLoS) connection between user equipment (UE) and NodeB (NB) in an operating universal mobile telecommunications system. A space-alternating generalized expectation-maximization (SAGE) algorithm is applied to estimate the delays and the complex attenuations of multipath components from the obtained channel impulse responses. Based on a novel LoS detection method of multipath parameter estimates, channels are classified into LoS and NLoS categories. Deterministic models which are named “channel maps” and fading statistical models have been constructed for LoS and NLoS, respectively. In addition, statistics of new parameters, such as the distance between the NB and the UE in LoS/NLoS scenarios, the life-distance of LoS channel, the LoS existence probability per location and per NB, the power variation at LoS to NLoS transition and vice versa, and the transition duration, are extracted. These models are applicable for designing and performance evaluation of transmission techniques or systems used by distinguishing the LoS and NLoS channels.

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