RMS Delay Spread and Path Loss Dependency for Mobile Outdoor UWB Channels

Root Mean Square (RMS) delay spread and path loss are two important parameters for any wireless channel characterization, and the relation between them was also under investigation for different signals. In this paper, the investigation of the dependency between the RMS delay spread and path loss was performed for the case of outdoor ultrawideband (UWB) channels with a frequency of 3.1–5.3 GHz. Both parameters were calculated based on measured channel impulse responses (CIRs), where PulsON 410 transceivers have been used for these measurements. Then analyzing the correlation coefficient between the obtained RMS delay spread and path loss values was achieved. Results show that there is a fluctuated positive linear correlation between the two parameters, where the maximum correlation value was 0.7675 reflecting higher correlation in comparison to the lowest value of 0.2951 in another measured channel. The scattering environment has a major effect on the relation between the parameters and consequently led to the fluctuation in the correlation properties.