学术报告：Bio-inspired Low Probability of Detection RF Steganography via Joint Radar/Communication Waveform Design

学术报告：Bio-inspired Low Probability of Detection RF Steganography via Joint Radar/Communication Waveform Design

 

报 告 人：美国Wright State Univeristy Zhiqiang Wu教授

 

主 持 人：张琳 副教授

 

报告简介

 

报告：

The chirp signal is one of the first bio-inspired signals commonly used in radio frequency (RF) applications where the term chirp is a reference to the chirping sound made by birds. It has since been recognized that birds communicate through such chirping sounds to attract other birds of the same species, to transmit an alarm for specific threats, etc. However birds of a different species, or sometime even birds in a different social group within a species, will be unable to connect a specific meaning to certain calls - they will simply hear a bird chirping. Inspired by such, this talk discusses recent research at Wright State University, in collaboration with Air Force Research Laboratory and Office of Naval Research, on a novel RF steganography scheme to conceal digital communication in linear chirp radar signals. We first provide a review of the linear chirp signal and existing communication systems using chirp waveforms. Next we discuss how to implement the RF steganography and hide digitally modulated communication information inside a linear chirp radar signal to prevent the enemy from detecting the existence of such hidden information. A new modulation called reduced phase shift keying is employed to make the modulated chirp waveform almost identical to the unmodulated chirp signal. Furthermore, variable symbol durations are employed to eliminate cyclostationary features that might otherwise be exploited by enemy to detect the existence of the hidden information.

 

报告人简介

 

Speaker : Zhiqiang Wu （Wright State University）

 

Dr. Zhiqiang Wu received his BS from Beijing University of Posts and Telecommunications in 1993, MS from Peking University in 1996, and PhD from Colorado State University in 2002, all in electrical engineering. He worked as a research engineer for Chinese Academy for Telecommunication Technologies (CATT) from 1996 to 1998. He also worked at West Virginia University Institute of Technology as an assistant professor from 2003 to 2005. He joined Wright State University in 2005 and currently serves as a full professor. He also serves as the co-director of the Center of Excellence on Sensor System Engineering of the state of Ohio. Dr. Wu is the author of national CDMA network management standard of China. He also co-authored one of the first books on multi-carrier transmission technologies for wireless communication. He has published more than 150 technical papers in journals and conferences. He has served as Chair of Acoustic Communication Interest Group of IEEE Technical Committee on Multimedia Communications. His research has been supported by the National Science Foundation, Air Force Office of Scientific Research, Air Force Research Laboratory, Office of Naval Research, and NASA. His work on software defined radio implementation of cognitive radio received the Best Demo Award at IEEE Globecom 2010.