Chirality effects on channel modeling for THz-band wireless communications in LoS/NLoS propagation

2016 ◽  
Vol 10 ◽  
pp. 27-37 ◽  
Author(s):  
Anna Maria Vegni ◽  
Valeria Loscrí
Keyword(s):  
Wireless Communications ◽  
Channel Modeling

Channel Modeling and Characteristics for 6G Wireless Communications

IEEE Network ◽  
2020 ◽  
pp. 1-8
Author(s):  
Hao Jiang ◽  
Mithun Mukherjee ◽  
Jie Zhou ◽  
Jaime Lloret
Keyword(s):  
Wireless Communications ◽  
Channel Modeling

scholarly journals Empirical Path Loss Channel Characterization Based on Air-to-Air Ground Reflection Channel Modeling for UAV-Enabled Wireless Communications

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Jatuporn Supramongkonset ◽  
Sarun Duangsuwan ◽  
Myo Myint Maw ◽  
Sathaporn Promwong
Keyword(s):  
Wireless Communications ◽  
Wireless Communication ◽  
Channel Model ◽  
Measurement Data ◽  
Path Loss ◽  
Channel Modeling ◽  
Channel Characterization ◽  
Distance Model ◽  
Aerial Vehicle ◽  
The Impact

The purpose of this work was to investigate the air-to-air channel model (A2A-CM) for unmanned aerial vehicle- (UAV-) enabled wireless communications. Specifically, a low-altitude small UAV needs to characterize the propagation mechanisms from ground reflection. In this paper, the empirical path loss channel characterizations of A2A ground reflection CM based on different scenarios were presented by comparing the wireless communication modules for UAVs. Two types of wireless communication modules both WiFi 2.4 GHz and LoRa 868 MHz frequency were deployed to study the path loss channel characterization between Tx-UAV and Rx-UAV. To investigate the path loss, three types of experimental channel models, such as CM1 grass floor, CM2 soil floor, and CM3 rubber floor, were considered under the ground reflection condition. The analytical A2A Two-Ray (A2AT-R) model and the modified Log-Distance model were simulated to compare the correlation with the measurement data. The measurement results in the CM3 rubber floor scenario showed the impact from the ground reflection at 1 m to 3 m Rx-UAV altitudes both 2.4 GHz and 868 MHz which was converged to the A2AT-R model and related to the modified Log-Distance model above 3 m. It clear that there is no ground reflection effect from the CM1 grass floor and CM2 soil floor. This work showed that the analytical A2AT-R model and the modified Log-Distance model can deploy to model the path loss of A2A-CM by using WiFi and LoRa wireless modules.

scholarly journals Advances in Statistical Channel Modeling for Wireless Communications

2015 ◽  
Vol 2015 ◽  
pp. 1-2 ◽  
Author(s):  
José F. Paris ◽  
Paschalis C. Sofotasios ◽  
Theodoros A. Tsiftsis
Keyword(s):  
Wireless Communications ◽  
Channel Modeling ◽  
Statistical Channel Modeling

scholarly journals Space-Time Channel Modeling for Wireless Communications

2008 ◽  
Vol 2007 (1) ◽  
Author(s):  
Thushara Abhayapala ◽  
Mérouane Debbah ◽  
Rodney A. Kennedy
Keyword(s):  
Wireless Communications ◽  
Channel Modeling ◽  
Space Time

scholarly journals Channel Modeling for In-body Optical Wireless Communications

2021 ◽  
Author(s):  
Stylianos E. Trevlakis ◽  
Alexandros-Apostolos A. Boulogeorgos ◽  
Nestor D. Chatzidiamantis ◽  
George K. Karagiannidis
Keyword(s):  
Wireless Communications ◽  
Biomedical Applications ◽  
Channel Model ◽  
Channel Modeling ◽  
Theoretical Framework ◽  
Optical Wireless ◽  
Independent Research ◽  
Optical Wireless Communications ◽  
The Impact ◽  
Analytical Expressions

Next generation in-to-out-of body biomedical applications have adopted optical wireless communications (OWCs). However, by delving into the published literature, a gap is recognised in modeling the in-to-out-of channel, since most published contributions neglect the particularities of different type of tissues. Towards this direction, in this paper we present a novel pathloss and scattering models for in-to-out-of OWC links. Specifically, we derive extract analytical expressions that accurately describe the absorption of the five main tissues’ constituents, namely fat, water, melanin, oxygenated and de-oxygenated blood. Moreover, we formulate a model for the calculation of the absorption coefficient of any generic biological tissue. Next, by incorporating the impact of scattering in the aforementioned model we formulate the complete pathloss model. The developed theoretical framework is verified by means of comparisons between the estimated pathloss and experimental measurements from independent research works. Finally, we illustrate the accuracy of the theoretical framework in estimating the optical properties of any generic tissue based on its constitution. The extracted channel model is capable of boosting the design of optimized communication protocols for a plethora of biomedical applications.

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