Power limits fulfilment and MUI reduction based on pulse shaping in UWB networks

Pulse shaping in ultra-wide band (UWB) networks based on impulse radio (IR) is a viable way for adapting the power spectral density (PSD) of transmitted signals to spectral requirements. The proposed pulse shaping method is based on linear combination of a set of base waveforms obtained by differentiation of the Gaussian pulse. Strategies for selecting linear combination coefficients are proposed and approximation of emission masks for UWB indoor systems based on linear combination of the above base functions is analyzed. It is shown that linear combination of base waveforms fulfils spectral requirements with higher efficiency than that achieved by a single waveform. The adoption of pulse shaping in the reduction of multiuser interference (MUI) between different UWB networks is finally proposed and evaluated by means of simulations.