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Elimination of Motion-Induced Phase Based on Double-Time Switching Scheme for SAA FMCW Radar

1, 2, 1 and 1,*
1
College of Electronic Science and Technology, National University Of Defense Technology, Changsha 410073, China
2
China Electronics Technology Group Corp 13th Research Institute, Shijiazhuang 050000, China
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(7), 786; https://doi.org/10.3390/electronics8070786
Received: 1 June 2019 / Revised: 4 July 2019 / Accepted: 12 July 2019 / Published: 14 July 2019
(This article belongs to the Special Issue Radar Sensor for Motion Sensing and Automobile)
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Abstract

Due to the low cost and straightforward structure, the switch antenna array (SAA) frequency modulated continuous wave (FMCW) radar has been widely applied in many fields. However, the motion-induced phase always leads to inaccurate direction estimation of moving targets. Here, we proposed an elimination method of the motion-induced phase for the SAA FMCW radar. A double-time switching scheme (DTSS) is used for the reception of echo signals. Elimination of motion-induced phase is completed without estimating velocity, which can avoid the ambiguous velocity estimation problem. Additionally, the direction estimation of the moving target can be obtained by directly using a conventional digital beam forming (DBF) algorithm. The validity of the proposed method has been proved by the simulated and experimental results. View Full-Text
Keywords: switch antenna array (SAA); frequency modulated continuous wave (FMCW) radar; direction estimation; phase compensation switch antenna array (SAA); frequency modulated continuous wave (FMCW) radar; direction estimation; phase compensation
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Lin, Y.; Yang, K.; Guo, M.; Fu, Y. Elimination of Motion-Induced Phase Based on Double-Time Switching Scheme for SAA FMCW Radar. Electronics 2019, 8, 786.

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