报告题目：Make Sensing Smart: smart data ratherthan big data – the Center for Sensorsystems(ZESS)
报 告 人： Prof. Otmar Loffeld
报告时间: 2019 年 3 月 11日 上午9:00，北航新主楼第三会议室
After introducing ZESS (Center for Sensorsystems), highlighting the methodological research areas and presenting some application examples, putting a focus on remote sensing and bistatic SAR, the lecture will propose a candidate for a unifying theory to sensing, sensor signal processing and high level information extraction in form of a combination of Compressed Sensing and Bayesian estimation.
After a short introduction of some basics of Compressed Sensing, the lecture will concentrate on the potential of the nullspace – doing minimization in the nullspace of the sensing matrix. It will present A Kalman filter based approach to the solution of this minimization problem and other classical reconstruction algorithms for comparison, demonstrate the feasibility and efficiency of the approach. As an application example, the lecture will shortly present some results of Inverse SAR Imaging utilizing only a small percentage of the available raw data. Subsequently the scope will be widened to the general case of mono – or bistatic SAR imaging, highlighting the “curse of exploding dimensionality” and point out strategies to overcome these problems. Finally some conclusions will be given.
Otmar Loffeld received the Diploma degree in electrical engineering from the Technical University of Aachen in 1982, the Eng. Dr. degree, and the ‘habilitation’ in the field of digital signal processing and estimation theory in 1986, and 1989, respectively, both from the University of Siegen. In 1991 he was appointed as a professor for digital signal processing and estimation theory at the University of Siegen. Since then he has given lectures on General Communication Theory, Digital Signal Processing, Stochastic Models and Estimation Theory and Synthetic Aperture Radar. He is the author of two textbooks on estimation theory. In 1995 Prof. Dr. Loffeld became a member of the Center for Sensorsystems (ZESS) which is a central scientific research establishment at the University of Siegen. In 2005 he became the Chairman of that Center. In 1999 he became Principal Investigator (PI) on Baseline Estimation for the X-Band part of the Shuttle Radar Topography Mission (SRTM) where ZESS contributed to DLR’s baseline calibration algorithms. Prof. Loffeld is PI for interferometric techniques in the German TerraSAR-X mission, and, together with Prof. Ender from FGAN, one of the PI’s for a bistatic spaceborne airborne experiment. In the experiment, TerraSAR-X will serve as the bistatic illuminator while FGAN’s PAMIR system mounted on a Transall airplane, which will be used as a bistatic receiver. Pof. Loffeld is also a member of the ITG/VDE and Senior Member of the IEEE/GRSS.