August 2022 | NTIA Technical Report TR-22-561
Jeffery A. Wepman; Linh P. Vu; Edward F. Drocella Jr.; John D. Ewan; Kenneth J. Brewster; Paul M. McKenna
Abstract: Line-of-sight (LOS) and non-line-of-sight (NLOS), continuous-wave (CW), mobile outdoor propagation measurements were performed in the 37–40 GHz band in a small city downtown environment (Boulder, Colorado). The measurement system was optimized to provide measurements over the maximum practicable distance (about 3 km) between the transmitter and receiver. The transmitter was placed at a fixed location and time domain samples of in-phase and quadrature (IQ) data along with position data were collected by the mobile receiver along LOS and NLOS paths. The data were processed to provide received signal power as a function of position and basic transmission gain G_b vs. distance between the transmitter and receiver. Measured G_b as a function of distance was compared to that predicted by free space and the 3rd Generation Partnership Project (3GPP) LOS and NLOS path loss models for the urban microcell (UMi) case. In general, the measured G_b did not agree well with that predicted by the free space and 3GPP models.
Keywords: millimeter wave; propagation model; path loss; radio propagation measurements; 5G; basic transmission gain; continuous-wave measurements; narrowband measurements; 3GPP
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Jeffery A. Wepman
Institute for Telecommunication Sciences
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