Abstract
Switch antenna array (SAA) frequency modulated continuous wave (FMCW) radar has been studied by many researchers due to its low cost and straightforward architecture. However, the motion-induced phase leads to incorrect direction-of-arrival (DoA) estimation, which is one of the main obstacles when it is applied to a moving scenario. To address this problem, we propose a motion compensation method based on a specific switching scheme in this paper. The effectiveness of this method is verified by simulation and measurement results. This approach only requires basic signal processing techniques and avoids complex optimization algorithms.
Highlights
Switch antenna array (SAA) frequency modulated continuous wave (FMCW) radar has received extensive attention due to its low complexity architecture and small size
The phase difference between adjacent elements is expressed as φd = βd sin θ which is the same as the multichannel antenna array, where β = 2π/λ is the wave propagation constant, λ is the wavelength in free space, d is the spacing of uniform linear array (ULA), and θ is the direction-of-arrival (DoA)
This paper proposes a specific switching scheme to compensate for the motion-induced phase for SAA FMCW radar
Summary
Switch antenna array (SAA) frequency modulated continuous wave (FMCW) radar has received extensive attention due to its low complexity architecture and small size. Yang proposed a two-cycle switching scheme to achieve DoA estimation [3] This method is only applicable to scenes where the target moves at a slower speed. Dominik and Ziroff [14] used the echo signal of the first antenna element to estimate a target’s velocity, and used this velocity to construct a term to compensate for the phase response of the moving target. Found that the phase difference introduced by the target motion can be ignored when the transmit antenna was quickly switched at a single frequency These methods cannot be applied to SAA radars. This paper proposes a specific switching scheme to compensate for the motion-induced phase for SAA FMCW radar. The proposed method only requires basic signal processing techniques and avoids complex optimization algorithms
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
