1,799 research outputs found
Outdoor to Indoor Penetration Loss at 28 GHz for Fixed Wireless Access
This paper present the results from a 28 GHz channel sounding campaign
performed to investigate the effects of outdoor to indoor penetration on the
wireless propagation channel characteristics for an urban microcell in a fixed
wireless access scenario. The measurements are performed with a real-time
channel sounder, which can measure path loss up to 169 dB, and equipped with
phased array antennas that allows electrical beam steering for directionally
resolved measurements in dynamic environments. Thanks to the short measurement
time and the excellent phase stability of the system, we obtain both
directional and omnidirectional channel power delay profiles without any delay
uncertainty. For outdoor and indoor receiver locations, we compare path loss,
delay spreads and angular spreads obtained for two different types of
buildings
73 GHz Wideband Millimeter-Wave Foliage and Ground Reflection Measurements and Models
This paper presents 73 GHz wideband outdoor foliage and ground reflection
measurements. Propagation measurements were made with a 400 Megachip-per-second
sliding correlator channel sounder, with rotatable 27 dBi (7 degrees half-
power beamwidth) horn antennas at both the transmitter and receiver, to study
foliage-induced scattering and de-polarization effects, to assist in developing
future wireless systems that will use adaptive array antennas. Signal
attenuation through foliage was measured to be 0.4 dB/m for both co- and
cross-polarized antenna configurations. Measured ground reflection coefficients
for dirt and gravel ranged from 0.02 to 0.34, for incident angles ranging from
60 degrees to 81 degrees (with respect to the normal incidence of the surface).
These data are useful for link budget design and site-specific (ray-tracing)
models for future millimeter-wave communication systems.Comment: 6 pages, 4 figures, 2015 IEEE International Conference on
Communications (ICC), ICC Workshop
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