Spectrally efficient ultra-wideband transmission over wireless sensor network

This presentation addresses a novel spectrally-efficient signal model for ultra-wideband (UWB)-based wireless sensor systems. An optimal auxiliary independent signal (AIS) is proposed to suppress undesired spectral lines using a defined spectral optimization problem. A spectral notching scheme based on digital filtering to synthesise UWB pulses is also designed so as to limit the interference caused by the existing narrowband interferers. Based on the current contribution, different transmission scenarios are presented for sensor communications. Finally, the spectral characteristics and performances are evaluated by numerical results.