Direction Estimation of Low-SNR Moving Targets for SAA FMCW Radar | Zendy

Yi Lin | Zendy; Kai Yang | Zendy; Min Guo | Zendy; Yunqi Fu | Zendy

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Direction Estimation of Low-SNR Moving Targets for SAA FMCW Radar

Author(s) -

Yi Lin,

Kai Yang,

Min Guo,

Yunqi Fu

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2876936

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

Switch antenna array (SAA) frequency modulated continuous-wave (FMCW) radar has garnered a great deal of research attention in recent years due to its low cost and small volume. The phase shift caused by a target's movement may lead to an inaccurate estimation of the target's direction. A direction estimation method for moving targets with low signal-to-noise ratio (SNR) is proposed in this paper for SAA FMCW radar applications. In the proposed method, digital beam forming (DBF) is applied twice. The improvement of the SNR of the echo signal is implemented by the first DBF. Meanwhile, the synthesized signal is used for distance and velocity estimation. The estimated velocity is then used to complete the phase compensation of the moving target. Finally, the direction estimation is implemented by the second DBF. The feasibility of the method is validated by numerical and experimental results. This method avoids the use of optimization algorithms and does not require eigenvalue decomposition calculations, which ensures its applicability under strict real-time requirements.

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