W-Band FMCW MIMO radar demonstrator system for 3D imaging.
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Beschreibung
A radar demonstrator system with real-time capabilitiy operating in the W-Band is presented. It operates around 100 GHz and provides 3D information about the illuminated scene. The system uses FMCW signals to extract range information. The MIMO principle is used to get angular information. The system design is verified with measurements in 2D and 3D. A data sequence showing real-time capability is recorded.
One of the most dangerous situations when flying a helicopter is landing over dry sand or powder snow. The rotors swirl particles creating a dense cloud. With optical methods navigating through this cloud is impossible but for millimetre waves it becomes almost transparent. As a consequence millimetre waves are an outstanding choice for the development of imaging systems that can be used as a landing aid. The aim of this work is the 3D imaging of static scenes with a large field of view, good resolution and high dynamics. In this thesis a demonstrator system is presented, which is based on the MIMO principle and works with FMCW radar modules in the millimetre wavelength range. The set-up of the demonstrator system is explained and the hardware components are described. An algorithm for image reconstruction is presented as well as a calibration routine. An optimized antenne aperture is determined that enables unambiguous imaging of the half-space in front of the aperture with good resolution and low side lobes. Various measurements illustrate three-dimensional imaging capabilities and show long-range operation. In addition, the data acquisition rate is determined.
Autor*in
Daniela Karina Bleh
Themen in »W-Band FMCW MIMO radar demonstrator system for 3D imaging.«
Fraunhofer IAF Engineering: general parallel processing signal processing MIMO radar millimeter wave 3D imaging radar system Elektrotechnik-Ingenieur angewandte Physiker Elektrotechnik-Ingenieure Angewandte Physiker