Zero Correlation Zone Based Preamble for Oversampled OFDM Networks in URWIN

[0009]The embodiments of the invention provide a zero-correlation-zone (ZCZ) based preamble for time synchronization in oversampled orthogonal frequency-division multiplexing (OFDM) OFDM networks in URWIN. In particular, our preamble can force a cross correlation function (CCF) used for time synchronization to be 0 within a certain region around a main lobe. The length of the ZCZ is guaranteed to be larger than the cyclic prefix (CP) length of OFDM symbols. This increases the accuracy of synchronization. As used herein, the length (L) means a time duration. Throughout the disclosure we make reference to a specific design in which various parameters of the preamble are explicitly defined. We call this design URWIN (Ultra-Reliable Wireless Industrial Network) and provide the numerical quantities for the preamble design for exemplary purposes. The specific parameters for the URWIN along with specific preamble sequences are shown in Tables IV-VII in the Appendix.

[0010]Notations and Definit