Ultra-wideband channel estimation using multichannel sampling at the rate of innovation

In this work, we consider a new approach for the problem of channel estimation in digital ultra-wideband (UWB) receivers. The idea is based on multichannel sampling of certain classes of parametric non-bandlimited signals that have a finite number of degrees of freedom per unit of time, or a finite rate of innovation. In this approach, sampling of the received UWB signal is implemented by a rate below the traditional Nyquist rate that yields high-resolution estimates of channel parameters and reduces the receiver complexity.