Trade-off between repetition factor and frame length in Time-Hopping Impulse Radio Ultra Wide Band

This paper investigates the parameters of time-hopping impulse radio ultra wide band (TH-IR-UWB). At a given spreading factor and a given system load, a trade-off has to be done in the choice of the frame length and the repetition factor. This trade-off lays on the condition of validity of the standard Gaussian approximation for multi user interferences (MUI). This study concerns both Pulse Amplitude Modulation and Pulse Position Modulation and may be applied to UWB networks with high density of users and low data rates like adhoc sensor networks, as well as networks with higher data rate and small number of users.