Training based synchronization and efficient demodulation for UWB systems

Relying on judicious training symbols, we can construct a redundance-included demodulation template (RDT) from the received signal. When the RDT is available, there are two approaches to select. One is to demodulate transmitted symbols directly by the RDT, which does not require timing acquisition, and thereby has considerably lower complexity. The alternative is to first acquire the timing offset via simple energy detection, which is used to amend the RDT to obtain a non-redundance-included demodulation template (NRDT), and then demodulate transmitted symbols with the aid of the NRDT. Both the two approaches can avoid the effects of inter-frame interference (IFI) and unknown multipath channels, and suppress the intersymbol interference (ISI). Simulation results demonstrate that the proposed algorithms are sound and efficient.