Method for performing synchronization in distributed carrier communications

Abstract

A highly efficient distributed synchronization (DS) uses waveforms that can be easily detected by the receiver while possessing desirable LPI/LPD characteristics. Differentially encoding the synchronization pattern reduces receiver computation because signal detection search space is collapsed to a single dimension. Dissimilar bursts are used for synchronization to remove correlated energy between different sets, while maintaining the same differentially encoded pattern. The DS functions only as a whole and not as individual carriers or channels. No single carrier conveys any useful information. All cross-channel coherence required for proper alignment and subsequent detection of the distributed synchronization set of bursts is possible due to large transmission hardware IF bandwidth. The synchronization pattern is differentially encoded by randomly generating two sets of complex numbers that are the same size as the synchronization pattern where the point-wise product of the second set with the conjugate of the first set comprises the synchronization pattern.

Dependencies are inferred from the claim text.