来源 | 雷达学报

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Joint time-frequency analysis (JTFA) has been studied extensively in the past decades and found many applications in signal and image processing, such as radar signal processing. A JTFA usually localizes a signal, such as a chirp, in the joint time-frequency (TF) plane, while it spreads noise over the TF plane. This implies that a JTFA usually increases the signal-to-noise ratio (SNR). In this talk, we first briefly introduce a JTFA, and then quantitatively analyze the SNR increase rate in the joint TF plane over the SNR in the time domain or in the frequency domain. We then apply it to ISAR imaging of maneuvering targets.

本讲座PPT共58张。

专家简介

Xiang-Gen Xia is the Charles Black Evans Professor, Department of Electrical and Computer Engineering, University of Delaware, Newark, Delaware, USA. Dr. Xia was the Kumar’s Chair Professor Group Professor (guest) in Wireless Communications, Tsinghua University, during 2009-2011, and the WCU Chair Professor (visiting), Chonbuk National University, during 2009-2013. He received the National Science Foundation (NSF) Faculty Early Career Development (CAREER) Program Award in 1997, the Office of Naval Research (ONR) Young Investigator Award in 1998, and the Outstanding Overseas Young Investigator Award from the National Nature Science Foundation of China in 2001, and the Information Theory Outstanding Overseas Chinese Scientist Award from the Chinese Information Theory Society of Chinese Institute of Electronics in 2019. Dr. Xia was the General Co-Chair of ICASSP 2005 in Philadelphia. He is a Fellow of IEEE.  His current research interests include space-time coding, MIMO and OFDM systems, digital signal processing, and SAR and ISAR imaging. He is the author of the book Modulated Coding for Intersymbol Interference Channels (New York, Marcel Dekker, 2000).

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