Impulse response measurements in the UHF and SHF bands for outdoor microcellular quasi-static environments

Wideband propagation measurements were performed in the 1.427-1.457, 6.685-6.715, 14.705-14.735 and 22-22.025 GHz bands in order to explore design alternatives for point-to-multipoint high rate data transmission systems. The measurements were carried out in metropolitan and suburban areas with both the transmitter and receiver stationary. The transmitter was located outside on the rooftop of a high rise building and the receiver inside another building. The receiver was then moved for each new set of measurements such that a whole room was covered in a grid-like fashion. The results show how the propagation environment (line-of-sight/non-line-of-sight, urban/suburban), the transmit/receive antenna patterns and the carrier frequency can have a significant impact on the RMS delay spread and path number statistics. Such information is particularly relevant to determine the appropriate RF and baseband processing strategies required to exploit multipath diversity in order to mitigate the large narrowband propagation losses at high frequencies