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In this paper, we propose a flexible and cost-effective Radio-over-Fiber (RoF) based network architecture to support indoor networking at millimeter wave bands.
Accurate characterization of spatial multipath channels at millimeter wave bands has gained significant interest both in industry and academia.
Accurate calibration of antenna element positions is required, which becomes even more challenging at millimeter wave bands.
It would be highly interesting to compare the channel characteristics at current cellular frequency bands and at millimeter wave bands in the same propagation scenarios.
Millimeter wave bands offer huge free spectrum and allow the implementation of massive antenna arrays due to the small wavelength [1, 2].
Richer multipath components are present at lower frequency bands due to diffuse scattering effects, while specular reflections are dominant at millimeter wave bands.
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Distributed techniques have been widely employed as a solution to obtain wide band circuits at microwave and millimeter wave band.
Therefore, the system for THz or millimeter wave band demands the lens to obtain strong focused signal from weak waves caused by scattering in atmospheric environment.
However, in the indoor environment, the propagation of signals at this millimeter wave band is strongly hindered by walls, people and their movement, furniture, etc.
It uses the 60GHz millimeter wave band.
The technology is called "millimeter wave band active phased array technology," but let's try and simplify that.
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