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This paper addresses the problem of coarse synchronization of ultra wideband (UWB) signals in the dense multipath channel. We propose a very simple search strategy, based on successive constant integer jumps, which practically achieves minimum mean acquisition time (MAT) without using any channel knowledge. There is a parallelism between the popular bit reversal search, which is valid when the size...
In this paper we propose a framework for analyzing the performance of ultra wide band (UWB) receiver architectures in sparse multipath channels with intra-pulse interference. In particular, we develop an analytical method based on approximating the moment generating function (MGF) of the received signal-to-noise ratio (SNR) via Pade expansion. We derive closed-form expressions for the average bit...
This paper combines the modeling of transmitted-reference (TR) systems with autocorrelation receivers as Volterra equivalent system models, and the statistical characterization of the inter-pulse-interference due to multipath propagation. We obtain the statistics of the Volterra model coefficients as a function of system and channel parameters. In its generic form, the analysis can be used for numerical...
In this paper, we propose a novel autocorrelation receiver (AcR) for transmitted-reference signaling that alleviates excessive noise collection. Specifically, we employ a stop-and-go strategy based on energy detection in the AcR to selectively collect portions of effective signal. This avoids noise collection from time regions within the integration interval that do not contain useful energy contributions...
Ranging requires detection of the first arriving signal component. The accuracy of time-of-arrival-based range estimation is greatly degraded in the presence of multi-user interference (MUI). We develop a method that applies a nonlinear filter on received signal energy to suppress multiuser interference. Then, leading signal path is tracked via an iterative searchback algorithm. The method is tested...
A hybrid direct-sequence (DS)-multiband ultra-wideband (UWB) multiple access system is proposed and a simple error analysis is presented for the system considering a multipath channel. The error analysis facilitates to obtain simple-to-evaluate Improved Gaussian approximation (SIGA), a method that has previously mainly been used in DS-CDMA. In this paper, we show that the method can also be used effectively...
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