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Terahertz Line-Of-Sight MIMO Communication Theory and Practical Challenges

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Document pages: 7 pages

Abstract: A relentless trend in wireless communications is the hunger for bandwidth,and fresh bandwidth is only to be found at ever-higher frequencies. While 5Gsystems are seizing the mmWave band, the attention of researchers is shiftingalready to the terahertz range. In that distant land of tiny wavelengths,antenna arrays can serve for more than power-enhancing beamforming. Defyinglower-frequency wisdom, spatial multiplexing becomes feasible even inline-of-sight conditions. This paper reviews the underpinnings of thisphenomenon, and it surveys recent results on the ensuing information-theoreticcapacity. Reconfigurable array architectures are put forth that can closelyapproach such capacity, practical challenges are discussed, and supportingexperimental evidence is presented.

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