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Squircle-Based Calibration Algorithm for Six-Port Radar
Publikationstyp
Journal Article
Publikationsdatum
2019-10-01
Sprache
English
TORE-URI
Volume
67
Issue
10
Start Page
4023
End Page
4030
Article Number
8798881
Citation
IEEE Transactions on Microwave Theory and Techniques 10 (67): 8798881 (2019-10-01)
Publisher DOI
Scopus ID
2-s2.0-85077438958
This article presents a new approach to calibrate six-port radar systems without the need for well-known target positions or calibration standards. Due to an extension of an ellipse-based calibration, the detectors' nonlinearities can also be included into this one-step calibration. A so-called squircle is used to approximate measured I/Q data of arbitrary and possibly unknown target positions. It is demonstrated with measurement data, that the implicit function of the squircle is suitable to model errors caused by power imbalance, crosstalk or parasitic reflections as well as detector nonlinearities. Furthermore, a method for mapping the impaired measurement data to an ideal circle is presented. This enables the accurate reconstruction of a target's displacement.
Schlagworte
Calibration
displacement measurement
radar
six-port