Effect of UWB multiple access schemes on the power parameters of multiuser interference

In this study, we examine the effect of spreading sequence matched filtering on the power parameters of ultrawideband (UWB) multiuser interference (MUI) under different multiple access (MA) scenarios. In many applications, a UWB receiver averages the received signal over multiple pulse transmissions to increase the signal-to-noise ratio. This can be done by employing a spreading sequence matched filter (MF). We investigate the manner in which the length of the sequence MF affects the average power, peak power, and the peak-to-average ratio (PAR) of the matched filtered version of an MUI signal. The analysis and simulation results show that each parameter changes with the number of averages in a different manner, depending on the MA scenarios. This difference is particularly remarkable with regard to the PAR. The results of the analysis performed for a simplified scenario are supported by the simulation results obtained for a realistic multipath environment.