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Shen, Ruizhan

University of British Columbia

In recent years, an increasing number of satellites in low Earth orbit are using frequencies above 10 GHz when communicating with stations on the ground in order to achieve higher data rates than are possible at lower frequencies. Such satellites are expected to revolutionize Internet access from rural and remote locations. However, wireless communications at such frequencies are susceptible to fading due to the presence of rain and other precipitation along the path. In order to devise and assess fade mitigation techniques, accurate models of the fading process are required. Here, we: 1) survey the literature concerning modelling and mitigation of propagation impairment at millimetre-wave bands over Earth-space links during the past two decades, including advances in rain attenuation modelling, development of fade mitigation techniques, and corresponding requirements for channel modeling, and identify gaps and omissions that remain to be filled, 2) show how to correctly determine the dynamic parameter of the Maseng-Bakken stochastic dynamic model for rain fading, which is widely used to simulate fading on fixed paths to geostationary satellites, when applied to Earth-space links to satellites in non-geostationary satellites, thus overcoming a significant error in previous work, and 3) present our design for a dynamic channel emulator that can use this model for over-the-air testing of CubeSats at frequencies above 10 GHz.

Text

2024-04-19

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/87894

Electrical and Computer Engineering

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/4.0/