Synchronization, Doppler scale and channel estimation for underwater communications based on dual Zadoff-Chu sequences
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 report, 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.
Biography: Yiyin Wang received the B.S. degree in electrical engineering from Fudan University, Shanghai, China, in 2002, the M.S. degree (cum laude) in microelectronics from Delft University of Technology (TU Delft), The Netherlands, and Fudan University, China, in 2005, respectively, and the Ph.D. degree in electrical engineering from TU Delft, in 2011. She is currently an Associate Professor with the Department of Automation, Shanghai Jiao Tong University, China. Prior to that, she was a Research Assistant at the Circuits and Systems group (CAS), TU Delft, from 2006 to 2007. From February 2010 until July 2010, she visited Georgia Institute of Technology (Georgia Tech), Atlanta. She was a Postdoctoral Fellow at TU Delft and then with Georgia Tech from 2011 to 2013. Her research interests lie in the general area of signal processing for communications and networking. She currently focuses on synchronization, tracking, and localization for underwater wireless sensor networks.