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

• Main Authors: Yi Lin, Kai Yang, Min Guo, Yunqi Fu
• Format: Article
• Language: English
• Published: MDPI AG 2019-07-01
• Series: Electronics
• Subjects: switch antenna array (SAA); frequency modulated continuous wave (FMCW) radar; direction estimation; phase compensation
• Online Access: https://www.mdpi.com/2079-9292/8/7/786

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.