Optimal insertion of pilot symbols for transmissions over time-varying flat fading channels
IEEE Transactions on Signal Processing
Frame Synchronization for Variable-Length Packets
IEEE Journal on Selected Areas in Communications
Acquisition times of contiguous and distributed marker sequences: a cross-bifix analysis
SETA'10 Proceedings of the 6th international conference on Sequences and their applications
Statistical analysis of search for set of sequences in random and framed data
SETA'10 Proceedings of the 6th international conference on Sequences and their applications
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A novel approach is introduced for the design of a Unique Word (UW) for frame synchronization in Time Division Multiplexing/Time Division Multiple Access (TDM/TDMA) systems. In particular, the UWsymbols are distributed in each frame in a specific pattern in order to optimize the UW autocorrelation properties. The distribution patterns are scalable, since they preserve their autocorrelation properties under truncation. The resulting frame structure enables the use of several types of UWs, including the Silent-UW (SUW) and the Unit-UW (UUW), that are novel approaches for which the optimal Bayes detector is derived. An analytical performance characterization is presented along with comparisons with state-of-the-art alternatives. We show that SUW can significantly outperform the classic UW in the presence of frequency offsets or whenever data interference is the main impairment to cope with, i.e. at moderate to high signal to noise ratios. Interestingly, this performance improvement comes with the further advantage of a considerable complexity reduction. Hence UUW is shown to provide both performance improvement and complexity reduction.