Frequency-Dependence of Channel Delay Spread in an Outdoor Environment

International audience<p>Millimeter-Wave (mmW) communicationsystems, capable of achieving high data rates thanks to thelarge bandwidth available in this frequency range, are apromising 5G technology. Studies in this paper investigatethe radio propagation channel at 3, 17 and 60 GHz in anOutdoor environment. Measurements were conductedusing a wideband channel sounder to derive channel delayspread (DS). Results do not indicate a clear trend on thebehavior of the DS with regards to the frequency. Thisdisagrees in some way with the 3GPP TR 38.900 channelmodel findings which support a clear decreasing trend ofthis parameter as the frequency increases. At 60 GHz, thechannel DS was computed with and without compensationof atmospheric oxygen absorption. It was found that thisphenomenon has minor impact on the measurementresults. Its compensation does not change the mainconclusions.