Abstract
Large bandwidths are needed to meet the high-throughput requirements of future wireless communication systems. These larger bandwidths are available at mmWave and sub-THz frequencies, such as the V-band ranging from 50 to 75 GHz and the D-band ranging from 110 to 170 GHz. In this paper, we present channel measurements in an office environment, covering the full D-band. Line-of-Sight (LOS) path loss (PL) is modeled as a function of frequency and distance. Both a single-frequency floating-intercept and multi-frequency alpha-beta-gamma model provide a good fit to the measured LOS PL data. Attenuation due to blockage of the LOS path by various desk objects, such as computer peripherals and cables, is determined, as well as attenuation due to plant obstructions. Attenuation due to an obstructed LOS path ranges from 3 dB for a single universal serial bus (USB) cable, and up to 25 dB for a laptop power supply, computer mouse, computer monitor, or plant. Because of a higher diffraction angle, the measured attenuation is higher when the distance between the antennas decreases. We measure diffraction around a computer monitor for dual polarization and verify whether communication via the reflected non Line-of-Sight path makes high-throughput wireless communication possible when the LOS path is blocked.
Highlights
It is expected that future wireless communication systems will require higher throughputs than the data rates attainable today
The FI model parameters as a function of frequency are visualized in Figure 7, with an indication of the 95% confidence interval (CI) for both regression parameters
The reference path loss (PL) is on average 0.3 dB higher than the calculated free space path loss (FSPL), whereas the PL exponent n is just below the FSPL exponent of 2. This is in line with the findings from Xing et al that a fitted close-in PL model agrees well with a FSPL model [11]
Summary
It is expected that future wireless communication systems will require higher throughputs than the data rates attainable today. A laptop can establish a high-throughput link to a hub that is placed on the desk and use the wireless link for sending video streams, data files, and for connecting peripherals, but it can connect to a hub that is fixed at the ceiling and acts as a high-throughput access point. The latter is characterized by distances up to a few meters and a low probability of Line-of-Sight (LOS)
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