A three-stage cross correlation-based timing synchronization algorithm for MB-OFDM UWB systems

We propose a three-stage cross correlation-based timing synchronization algorithm for multiband-OFDM UWB systems. By utilizing the time-domain base sequence of the packet/frame synchronization preamble, the proposed algorithm first performs a coarse estimation on the reference symbol boundary, followed by a fine estimation on locating the exact boundary of the FFT window for the symbol, and a final check if the exact boundary is within an intersymbol interference-free zone. Numerical results reveal the effectiveness of the proposed algorithm in terms of mean square error and synchronization probability with respect to prior works.