Signal Processing - Signal processing in UWB communications
Two-step synchronization for direct-sequence UWB systems with corresponding demodulation scheme
WOCN'09 Proceedings of the Sixth international conference on Wireless and Optical Communications Networks
Superimposed training for channel shortening equalization in OFDM
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Iterative synchronization of multiuser ultra-wideband signals
IEEE Transactions on Wireless Communications
International Journal of Communication Systems
BodyNets '13 Proceedings of the 8th International Conference on Body Area Networks
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Synchronization is a performance-critical factor in most communication systems: from classical narrowband and emerging (ultra) wideband (UWB) point-to-point links to cooperative or ad hoc networking, where access must deal with multi-user interference (MUI) and possibly severe intersymbol interference (ISI). For universal applicability to all these scenarios, we develop a blind synchronization and demodulation scheme which relies on intermittent transmission of nonzero mean symbols. These enable MUI- and ISI-resilient timing acquisition via energy detection and low-complexity demodulation by matching to a synchronized aggregate template (SAT). The resultant SAT receiver offers distinct advantages over RAKE, has low-complexity and lends itself naturally to decision-directed enhancements. Its blind operation nicely fits the requirements of multi-user ad hoc access and its ability to handle ISI is particularly attractive for UWB communications. Analytical performance evaluation and simulations testing our novel scheme in UWB settings confirm its high potential for deployment