A Timing Synchronization Scheme for MB-OFDM Based UWB Systems

Correlation difference timing scheme (CDTS) algorithm based on cross-correlation difference and correlation summation peak protection is proposed to address the critical issue of symbol timing synchronization for MBOFDM based UWB systems. The two step synchronization scheme attempts to locate the start sample of the frame sequence (FS) by firstly calculating the cross correlation difference of received symbols and predefined preamble and then finding summation of correlation peak within the timing index chosen in the first step. Therefore, the timing index could be guaranteed to be unique. The performance of the proposed algorithm is evaluated by mean square error (MSE). CDTS algorithm could implement timing synchronization for MB-/OFDM based UWB systems and make the uniqueness of timing index for sure. The MSE of CDTS is evidently lower than conversional method.