Agenda

Signal Processing Seminar

Synchronization for underwater communications based on dual Zadoff-Chu sequences

Yiyin Wang

Abstract: Underwater acoustic channels are not only characterized by multipath propagation but also by Doppler scaling effects. These characteristics challenge the preliminary tasks of an acoustic receiver, such as timing and frequency synchronization, and Doppler scale and channel estimation. In this talk, we propose a novel preamble design based on a dual Zadoff-Chu (ZC) sequence. With the help of the well design preamble, a cyclic feature based detector is developed to bypass the requirement of channel statistic information. The Doppler scale estimation is simplified as the frequency estimation adopting the ESPRIT type algorithm. Furthermore, the special structure of the preamble facilitates the estimation of the residual carrier frequency offset (CFO), and the good correlation properties of the preamble enable a low-cost channel estimation. Therefore, with a single preamble, multiple preliminary tasks of the receiver are accomplished. Simulation results indicate the superior performance of the proposed methods.

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