Experimental measurement and statistical analysis of the RMS delay spread in time-varying ultra-wideband communication channel

Measurement and empirical modelling of root mean square delay spread in indoor femtocells scenarios

“…Generally, the RMS delay spreads have two dependencies, one is the separation of the transmitting and receiving antennas ( d ) [8–12] and the other is the path loss (PL) [5, 11, 13, 14]. These models give a qualitative relationship between d or PL and RMS delay spread [8, 9], or use a linear function with respect to d or PL to describe the RMS delay spread [5, 10–14] in both of indoor and outdoor environments. Basically, the existing models share two commonalities: The first one is relatively long communication ranges (about the coverage range of macro/micro cell) are investigated, and the other one is the randomness of the RMS delay spread is not modelled.…”

“…This leads to the fact that the RMS delay spread should be described as a random variable [17]. Although the models in [5, 8–14] can be used to describe the preliminary tendency of the RMS delay spread about d or PL, the randomness of the RMS delay spread are rarely characterised.…”

High-Resolution Delay Spread of Wide-Band Wireless Link in Long Tunnels—Theory and Experimental Verification

“…This visualization of the experiment and simulation data can offer a clearer understanding of the multi-path components that reflect off the walls on their way to the receiver. The multi-path components can challenge the use of high data rates [28,29]. The PDP plot demonstrates the different rays received at the receiver.…”

Wideband Performance Comparison between the 40 GHz and 60 GHz Frequency Bands for Indoor Radio Channels

“…This RMS delay spread is also the square root of the second central moment of the PDP. The formula for the RMS delay spread is shown in Equation (3) [8,9]. The symbol interval used in the system has to be much larger than the RMS delay spread of the radio channel to avoid ISI [10].…”