Fine Synchronization with UWB TH-PAM Signals in Ad-Hoc Multi-user Environments

To synchronize Ultra-Wideband (UWB) signals with pulse amplitude modulation (PAM) and time hopping (TH) spreading in ad-hoc multi-user environments, we propose in this paper to develop and test a novel flne synchronization algorithm in both data-aided (DA) and non-data-aided (NDA) modes. The proposed synchronization scheme is decomposed into two successive ∞oors or steps. The flrst ∞oor consists on a coarse synchronization which is based on timing with dirty templates (TDT) acquisition scheme. In the second ∞oor, we consider a new flne algorithm which provides an ameliorated estimate of timing ofiset. Simulation results and comparisons are also presented to conflrm our theoretical analysis and performance improve- ment (in terms of mean square error) compared to the original TDT algorithm in multi-user environments.

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