Azimuth-power-spectrum prediction by site-specific stochastic channel modeling in a microcell line-of-sight scenario

2007 ◽  
Author(s):  
M. Ghoraishi ◽  
J. Takada ◽  
T. Imai
Keyword(s):  
Power Spectrum ◽  
Channel Modeling ◽  
Line Of Sight ◽  
Spectrum Prediction ◽  
Site Specific

scholarly journals Space Telescope Motion Limitations for Fine Guidance Sensor Astrometry

1986 ◽  
Vol 109 ◽  
pp. 643-647
Author(s):  
Alain Fresneau
Keyword(s):  
Power Spectrum ◽  
Sensor Data ◽  
Line Of Sight ◽  
Space Telescope ◽  
Preliminary Results ◽  
Complete Identification ◽  
Astrometric Observation

Basic Fine Guidance Sensor data have been simulated to correlate the Power Spectrum Densities (PSD) of the Space Telescope motion disturbances with the “seeing” of an astrometric target. The goal of this study is to describe whether a complete identification of the jitter of the line of sight during an astrometric observation is required to improve the precision of this observation. The present preliminary results indicate that the performance in Astrometry are close to the predictions.

scholarly journals Line-of-Sight Anisotropies in the Cosmic Dawn and Epoch of Reionization 21-cm Power Spectrum

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Suman Majumdar ◽  
Kanan K. Datta ◽  
Raghunath Ghara ◽  
Rajesh Mondal ◽  
T. Roy Choudhury ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Line Of Sight

Exact Line-of-Sight Probability for Channel Modeling in Typical Indoor Environments

2018 ◽  
Vol 17 (7) ◽  
pp. 1359-1362 ◽  
Author(s):  
Hui Zheng ◽  
Jiliang Zhang ◽  
Hao Li ◽  
Qi Hong ◽  
Haonan Hu ◽  
...  
Keyword(s):  
Channel Modeling ◽  
Line Of Sight ◽  
Indoor Environments

scholarly journals Quantifying the line-of-sight halo contribution to the dark matter convergence power spectrum from strong gravitational lenses

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Atınç Çaǧan Şengül ◽  
Arthur Tsang ◽  
Ana Diaz Rivero ◽  
Cora Dvorkin ◽  
Hong-Ming Zhu ◽  
...  
Keyword(s):  
Dark Matter ◽  
Power Spectrum ◽  
Line Of Sight ◽  
Gravitational Lenses

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 Understanding the impact of Light cone effect on the EoR/CD 21-cm power spectrum

2017 ◽  
Vol 12 (S333) ◽  
pp. 12-17
Author(s):  
Kanan K. Datta ◽  
Rajesh Mondal ◽  
Raghunath Ghara ◽  
Somnath Bharadwaj ◽  
T. Roy Choudhury
Keyword(s):  
Power Spectrum ◽  
Order Statistics ◽  
Light Cone ◽  
Second Order ◽  
Line Of Sight ◽  
Periodic Signal ◽  
Angular Power Spectrum ◽  
Second Order Statistics ◽  
The Impact

AbstractRedshifted HI 21-cm signal from the cosmic dawn and epoch of reionization evolve considerably along the LoS. We study the impact of this evolution (so called the light cone effect) on the HI 21-cm power spectrum. It is found that the LC effect has a significant impact on the 3D power spectrum and the change could be up to a factor of few. The LC effect is particularly strong during the cosmic dawn near the ‘peaks’ and ‘dips’ in the power spectrum when plotted with redshift. We also show that the 3D power spectrum, which could fully describe ergodic and periodic signal, losses out some information regarding the second order statistics of the signal as the EoR/CD 21-cm signal is non-ergodic and non-periodic along the line of sight. We show that the multi-frequency angular power spectrum (MAPS)${\mathcal {C}}_{\ell }(\nu _1, \nu _2)$captures all the information regarding the second order statistics of the signal even in the presence of the LC effect.

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