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Let us look at how the channel varies with time. We collected 11209 channel realization over a 25 meters UT trajectory. To model non-stationary events, we used blockage that affects both the channel's large and small scale parameters. As we can see from the histogram, the value of the convergence in mean square is concentrated around zero. That means for the most part of the UT trajectory, the channel was mostly stationary or quasi-stationary. We notice that less than 0.01 percent of the channel realizations experience convergence in mean square value greater than 0.1. Also, the convergence in mean square values decreases as the SNR increases; that is, at higher SNR regions, the channel is experiencing a little variation. We should notice that the window size is small, so the variations are highly localized.
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IEEE/ICACT20210129 Slide.11
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