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This paper compares three candidate large-scale propagation path loss models for use over the entire microwave and millimeter-wave (mmWave) radio spectrum: the alpha–beta–gamma (ABG) model, the close-in (CI) free-space reference distance model, and the CI model with a frequency-weighted path loss exponent (CIF). Each of these models has been recently studied for use in standards bodies such as 3rd...
Recently a measurement campaign was performed and a subsequent channel model proposal was created for an indoor office environment at 73 GHz. The channel model included a detailed modeling of polarization which was designed to capture the expected effects of polarization observed in the literature. Using this new channel model we perform a study of how polarization impacts the performance of an indoor...
Multi-antenna technologies such as beamforming and Multiple-Input, Multiple-Output (MIMO) are anticipated to play a key role in “5G” systems, which are expected to be deployed in the year 2020 and beyond. With a class of 5G systems expected to be deployed in both cm-wave (3–30 GHz) and mm-wave (30–300 GHz) bands, the unique characteristics and challenges of those bands have prompted a revisiting of...
To meet the explosive growth in traffic during the next twenty years, 5G systems using local area networks need to be developed. These systems will comprise of small cells and will use extreme cell densification. The use of millimeter wave (Mmwave) frequencies, in particular from 20 GHz to 90 GHz, will revolutionize wireless communications given the extreme amount of available bandwidth. However,...
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