Propagation characteristics of very low latitude whistlers by ray tracing

1993 ◽  
Vol 76 (7) ◽  
pp. 63-69
Author(s):  
Kenji Ohta ◽  
Tooru Tomomatsu ◽  
Osamu Takahashi ◽  
Masashi Hayakawa
Keyword(s):  
Ray Tracing ◽  
Propagation Characteristics ◽  
Low Latitude

Study of propagation characteristics of very low latitude whistlers by means of three-dimensional ray-tracing computations

1997 ◽  
Vol 102 (A4) ◽  
pp. 7537-7546 ◽  
Author(s):  
Kenji Ohta ◽  
Yasuhiro Nishimura ◽  
Tomomi Kitagawa ◽  
Masashi Hayakawa
Keyword(s):  
Ray Tracing ◽  
Three Dimensional ◽  
Propagation Characteristics ◽  
Low Latitude

scholarly journals Analysis of Propagation Characteristics for Various Subway Tunnel Scenarios at 28 GHz

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Chengjian Wang ◽  
Wenli Ji ◽  
Guoxin Zheng ◽  
Asad Saleem
Keyword(s):  
Ray Tracing ◽  
Root Mean Square ◽  
Millimeter Wave ◽  
Measurement Data ◽  
Path Loss ◽  
Small Scale ◽  
Delay Spread ◽  
Mean Square ◽  
Propagation Characteristics ◽  
Subway Tunnels

In order to meet the higher data transmission rate requirements of subway communication services, the millimeter wave (mmWave) broadband communication is considered as a potential solution in 5G technology. Based on the channel measurement data in subway tunnels, this paper uses ray-tracing (RT) simulation to predict the propagation characteristics of the 28 GHz millimeter wave frequency band in different tunnel scenarios. A large number of simulations based on ray-tracing software have been carried out for tunnel models with different bending radiuses and different slopes, and we further compared the simulation results with the real time measurement data of various subway tunnels. The large-scale and small-scale propagation characteristics of the channel, such as path loss (PL), root mean square delay spread (RMS-DS), and angle spread (AS), for different tunnel scenarios are analyzed, and it was found that the tunnel with a greater slope causes larger path loss and root mean square delay spread. Furthermore, in the curved tunnel, the angle spread of the azimuth angle is larger than that in a straight tunnel. The proposed results can provide a reference for the design of future 5G communication systems in subway tunnels.

scholarly journals Propagation Characteristics and Tolerance Analysis of Optical Wires in Flexible Optical PCB by Ray Tracing

2008 ◽  
Vol 19 (4) ◽  
pp. 255-261
Author(s):  
Jun-Cheol Yeom ◽  
Dae-Seo Park ◽  
Young-Seok Kim ◽  
Dae-Chan Kim ◽  
Se-Geun Park ◽  
...  
Keyword(s):  
Ray Tracing ◽  
Tolerance Analysis ◽  
Propagation Characteristics

Propagation characteristics of Pi 2 pulsations observed at high- and low-latitude MAGDAS/CPMN stations: A statistical study

2009 ◽  
Vol 114 (A11) ◽  
pp. n/a-n/a ◽  
Author(s):  
Teiji Uozumi ◽  
S. Abe ◽  
K. Kitamura ◽  
T. Tokunaga ◽  
A. Yoshikawa ◽  
...  
Keyword(s):  
Statistical Study ◽  
Propagation Characteristics ◽  
Low Latitude
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