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Lens-based 77 GHZ MIMO radar for angular estimation in multitarget environments

Published online by Cambridge University Press:  24 April 2014

Steffen Lutz ,
Thomas Walter  and
Robert Weigel
Steffen Lutz*
Affiliation:
Laboratory of Microtechnology, University of Applied Sciences Ulm, Albert Einstein Allee 55, 89081 Ulm, Germany. Phone: +49 731 50 28575
Thomas Walter
Affiliation:
Laboratory of Microtechnology, University of Applied Sciences Ulm, Albert Einstein Allee 55, 89081 Ulm, Germany. Phone: +49 731 50 28575
Robert Weigel
Affiliation:
Institute for Electronics Engineering, University of Erlangen-Nuremberg, Cauerstrasse 9, 91058 Erlangen, Germany
*
Corresponding author: S. Lutz Email: [email protected]
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Abstract

The demanding tasks for automotive radar systems in multitarget scenarios require an increased target separation performance and new sensor concepts. In this contribution, a highly integrated 77 GHz time domain multiplex (TDM) MIMO radar is presented. The sensor is feasible for advanced direction of arrival (DOA) estimation in azimuth and elevation. For efficient and high-quality measurements a fractional-n phased locked loop (PLL) with integrated waveform generator, enabling chirp and frequency modulated continous waveform (FMCW) modulations, is implemented. Spatial beamforming is done with series feed array patch antennas in combination with a dielectric cylindrical lens. For the improvement of the direction of arrival (DOA) estimation performance a new lens-based MIMO radar approach is introduced. Therefore the classical MIMO approach is combined with the advantages of an optical beamforming concept. Due to the usage of these techniques the sensor performance in accuracy, ambiguity suppression, and angular resolution can be significantly increased.

Keywords

Radar applicationsRadar architecture and systems
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 6 , Issue 3-4: European Microwave Week 2013 , June 2014 , pp. 397 - 404
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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