Performance analysis of UWB impulse radios with noisy template reception

The overall performance of ultra-wideband (UWB) communication systems relies critically on the energy capture capability of UWB receivers. A family of transmitted-reference (TR) UWB receivers has been proposed to achieve effective energy capture at the cost of enhanced noise effect and reduced system capacity. In this paper, we investigate a new receiver structure based on a noisy template (NT). The NT-based receiver enjoys effective signal energy capture and low complexity as the TR family. It has better system capacity and less noise effect with respect to TR UWB. To shed light on the quantitative noise effect of our NT receiver, we derive closed-form expressions for the bit error rate (BER) performance in both sparse and dense multipath channels. Through analysis; we demonstrate that the NT reception scheme effectively alleviates the noise effect as the number of pilot symbols increases, without sacrificing the data rate. We also illustrate the relationship between the channel diversity gain and its ability in compensating for the noise effect.