Selected Research Topics of the Fraunhofer Institute for High Frequency
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Selected Research Topics of the Fraunhofer Institute for High Frequency Physics and Radar Techniques (FHR)

Prof. Dr.-Ing. Joachim Ender
Director of the ‘Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik’ FHR,
Chair for ‘High Frequency Sensors and Radar Techniques’, University of Siegen

Tuesday, October 9, 13:40-14:30,
  Faculty of Engineering and Natural Sciences (FENS) G029

As one of the 60 institutes of the Fraunhofer society, FHR conducts application-oriented research in the field of radar techniques and technologies and other related high frequency topics. Its partners and customers include the German Federal Defense Force, various companies in both the industrial and tertiary sectors, as well as national and international institutions from the public sector. FHR holds close links to various universities and scientific institutions, so several members of the staff give lectures at university, and FHR has its own doctorate program. The core competencies of FHR open up applications in all fields of high-frequency technology and signal processing. In this seminar, we will address the following selected topics:

In the field “Security in Space”, FHR investigates radar methods for the observation of objects in lower space and the atmosphere. The main objective is to collect information about individual satellites and their positioning in space, perform risk analysis, provide support for missions in space and detect radar signatures.

A second important research area is “Aerospace Radar Techniques” covering remote sensing and ground reconnaissance with high-resolution air- and space-borne radar. With the air-borne X-Band sensor PAMIR and the millimeter wave sensor MIRANDA-94, Fraunhofer FHR can produce radar imaging of outstanding quality. PAMIR serves as a demonstrator for a high resolution SAR/GMTI system with multi-mode operation using an electronically steerable phased array antenna. The system with a bandwidth of more than 3 GHz and a scan agility of -45 to +45 degrees serves as a platform for SAR imaging in stripmap, spotlight and sliding spotlight modes, ground moving target indication using a scan-MTI and spotlight scan mode, or ISAR imaging of ground moving targets at decimeter resolution. MIRANDA-94 is a miniaturized FMCW SAR working at 94 GHz which can be flown by a small UAV. The data are down-linked and processed in real time.

As a last topic we will address the progress of FHR in the “application of compressive sensing (CS) to radar”. Currently, CS-based ground moving target indication, ISAR imaging and autofocus techniques are investigated.

Joachim Ender studied Mathematics and Physics at the University of Münster, Germany. After receiving his diploma, he joined the Research Establishment for Applied Science (FGAN), Germany, in 1976, where he worked on statistical theory of detection and estimation, phased array antennas, imaging radar, radar signal processing problems, and the design, construction and air-borne operation of experimental SAR systems. He received the Dr.-degree at the Ruhr-University Bochum in electrical engineering. Since 1992 he is giving annular lectures on radar signal processing at three universities and was awarded with the title “Honorary Professor” in 2002. In 2003 he became the director of the FHR (Fraunhofer Institute for High Frequency Physics and Radar Techniques) located at Wachtberg close to Bonn, Germany, with 245 employees and an annual budget of about 22 Mio. €. Since December 2011 Prof. Ender holds the chair for High Frequency Sensors and Radar Techniques at the University of Siegen, continuing to lead the Fraunhofer FHR. His current interests with respect to his own research are: Very high resolution SAR imaging, 3D-SAR, multibaseline and wideband processing techniques for across-track SAR interferometry, ground moving target detection with air and space based radar including multistatic satellite constellations, inverse SAR for moving target imaging, bistatic SAR processing, MIMO-SAR and compressive sensing applied to radar. Joachim Ender was one of the founder members of the “European Conference on Synthetic Aperture Radar” (EUSAR). In 2009 Joachim Ender founded the “International Summer School on Radar and SAR”, bringing together young scientists from all over the world for one week to gain education on radar and SAR techniques by distinguished international lecturers. The summer school takes place each July at a nice location at the river Rhine. During the last decades he got several awards. Recently, in 2012, he received from the European Association for Signal Processing (EURASIP) the “Group Technical Achievement Award - For contributions to Array Signal Processing and Multichannel Synthetic Aperture Radar” and the “Best Paper Award” for a journal publication on compressive sensing.