Static channels
The influence of moving scatterers on the channel, as compared to moving a receiving antenna, was investigated by Kattenbach and Früchting [KaFr01]. To this end, they made measurements at three different frequencies, at 1.8, 5.2 and 17.2 GHz respectively, in 600 MHz of bandwidth for good temporal resolution, using a proprietary stepped-frequency correlation sounder. People walking around in the room acted as moving scatterers. The effect on static channels was clear from the broadening of the otherwise very narrow Doppler spectrum and the changes in the impulse response. Also, the amplitude variations over time are better noticeable than phase fluctuations, as many multipath components, stemming from for instance the constructional ...
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