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The Role of Millimeter-Waves in the Distance Measurement Accuracy of an FMCW Radar Sensor

Bhutani, A.; Marahrens, S.; Gehringer, M.; Göttel, B.; Pauli, M.; Zwick, T.

Abstract (englisch):
High-accuracy, short-range distance measurement is required in a variety of industrial applications e.g., positioning of robots in a fully automated production process, level measurement of liquids in small containers. An FMCW radar sensor is suitable for this purpose, since many of these applications involve harsh environments. Due to the progress in the field of semiconductor technology, FMCW radar sensors operating in different millimeter-wave frequency bands are available today. An important question in this context, which has not been investigated so far is how does a millimeter-wave frequency band influence the sensor accuracy, when thousands of distance measurements are performed with a sensor. This topic has been dealt with for the first time in this paper. The method used for analyzing the FMCW radar signal combines a frequency- and phase-estimation algorithm. The frequency-estimation algorithm based on the fast Fourier transform and the chirp-z transform provides a coarse estimate of the target distance. Subsequently, the phase-estimation algorithm based on a cross-correlation function provides a fine estimate of the target distance. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000098757
Veröffentlicht am 08.10.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochfrequenztechnik und Elektronik (IHE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 1424-8220
KITopen-ID: 1000098757
Erschienen in Sensors
Band 19
Heft 18
Seiten Article No.3938
Vorab online veröffentlicht am 12.09.2019
Schlagwörter millimeter-wave; frequency modulated continuous wave; frequency estimation; phase estimation; Cramér Rao lower bound; micrometer-accuracy range measurement
Nachgewiesen in Web of Science
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