A MIMO propagation channel model in a random medium

2007 ◽  
Author(s):  
Akira Ishimaru ◽  
James Ritcey ◽  
Sermsak Jaruwatanadilok ◽  
Yasuo Kuga
Keyword(s):  
Channel Model ◽  
Random Medium ◽  
Propagation Channel

A MIMO Propagation Channel Model in a Random Medium

2010 ◽  
Vol 58 (1) ◽  
pp. 178-186 ◽  
Author(s):  
A. Ishimaru ◽  
S. Jaruwatanadilok ◽  
J.A. Ritcey ◽  
Y. Kuga
Keyword(s):  
Channel Model ◽  
Random Medium ◽  
Propagation Channel

Investigation of HAPs Propagation Channel for Wireless Access in a Tropical Region at Ka-Band

2017 ◽  
Vol 7 (3) ◽  
pp. 1204
Author(s):  
Felix Obite ◽  
Jafri Din ◽  
Kamaludin Mohammad Yusof ◽  
Basliza M. Noor
Keyword(s):  
Fading Channels ◽  
Channel Model ◽  
Rain Attenuation ◽  
Wireless Access ◽  
Rician Fading ◽  
Communication Link ◽  
Propagation Channel ◽  
Ka Band ◽  
Tropical Regions ◽  
Budget Analysis

<p>In the last few years, High Altitude Platforms (HAPs) have attracted considerable effort due to their ability to exploit the advantages of satellite and terrestrial-based systems. Rain attenuation is the most dominant atmospheric impairment, especially at such frequency band. This paper addresses the modelling of rain attenuation and describes a propagation channel model for HAPs at Ka-band to provide efficient and robust wireless access for tropical regions. The attenuation due to rain is modeled based on three years measured data for Johor Bahru to estimate the actual effect of rain on signals at Ka band. The radio propagation channel is usually characterized as a random multipath channel. Specifically, a statistical derivation of probability distribution function for Rayleigh and Rician fading channels are presented. The model consists of multiple path scattering effects, time dispersion, and Doppler shifts acting on the HAPs communication link. Simulation results represent the fading signal level variations. Results show perfect agreement between simulation and theoretical, thereby conforming to the multipath structures. The information obtained will be useful to system engineers for HAPs link budget analysis in order to obtain the required fade margin for optimal system performance in tropical regions.</p>

A narrowband mobile satellite maritime propagation channel model at L-band

2021 ◽  
pp. 1-1
Author(s):  
Fernando Perez-Fontan ◽  
Vicente Pastoriza-Santos ◽  
Fernando Machado ◽  
Norbert Witternigg ◽  
Roman Lesjak
Keyword(s):  
Channel Model ◽  
Propagation Channel ◽  
L Band ◽  
Mobile Satellite

scholarly journals Propagation Channel Comparison between 23.5 and 45 GHz in Conference Scenario

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Jianwu Dou ◽  
Nan Zhang ◽  
Li Tian ◽  
Xiaoyi Yang ◽  
Xi Yuan ◽  
...  
Keyword(s):  
Diffuse Scattering ◽  
Channel Model ◽  
Hybrid Approach ◽  
Path Loss ◽  
Small Scale ◽  
Propagation Channel ◽  
Conference Room ◽  
Power Delay Profile ◽  
Scale Characteristics ◽  
Alpha Beta

The characteristics of propagation channel at 23.5 and 45 GHz in an indoor conference room are studied based on hybrid approach. A ray-based simulator which includes the reflection, penetration, diffraction, and diffuse scattering is adopted to generate the massive channel realizations. This platform is well calibrated in path and power delay profile (PDP) levels according to some specified measurements at different frequencies. Subsequently, according to the simulated channel samples, the statistical channel model for both the large and small scale characteristics is established based on the alpha-beta approach and extended Saleh-Valenzuela (S-V) structure, respectively. Results show that the slope of fitted path loss (PL) is less than free space due to the waveguide effect for both 23.5 and 45 GHz in indoor scenario and larger PL is experienced at higher frequency. Additionally, the cluster is more centralized with less spreads and decaying faster in delay domain at 45 GHz.

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