Template estimation in ultra-wideband radio

The short duration of transmitted pulses in ultra-wideband (UWB) impulse radio enables fine time resolution in the receiver and therefore the opportunity to take great advantage of multipath diversity. However, unlike narrowband channels, many UWB channels are frequency selective even if the channel consists of only a single path, significantly altering the shape of the pulse. In this paper we present a least squares approach to finding a suitable correlation template in a UWB receiver based on our knowledge of the transmitted waveform and some properties of the channel. It is shown that the template increases energy capture in the receiver when compared to a template with the same shape as the transmitted pulse, and is more resistant to narrowband interference than a transmitted reference system.