Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00184 Rome, Italy.
Sensors (Basel). 2023 Apr 19;23(8):4119. doi: 10.3390/s23084119.
A frequency-modulated continuous-wave radar for short-range target imaging, assembling a transceiver, a PLL, an SP4T switch, and a serial patch antenna array, was realized. A new algorithm based on a double Fourier transform (2D-FT) was developed and compared with the delay and sum (DAS) and multiple signal classification (MUSIC) algorithms proposed in the literature for target detection. The three reconstruction algorithms were applied to simulated canonical cases evidencing radar resolutions close to the theoretical ones. The proposed 2D-FT algorithm exhibits an angle of view greater than 25° and is five times faster than DAS and 20 times faster than the MUSIC one. The realized radar shows a range resolution of 55 cm and an angular resolution of 14° and is able to correctly identify the positions of single and multiple targets in realistic scenarios, with errors lower than 20 cm.
一种用于短距离目标成像的调频连续波雷达，由收发器、锁相环、SP4T 开关和串行贴片天线阵组成。开发了一种基于双傅里叶变换（2D-FT）的新算法，并与文献中提出的延迟求和（DAS）和多重信号分类（MUSIC）算法进行了比较，用于目标检测。这三种重建算法应用于模拟标准情况下，证明了雷达分辨率接近理论分辨率。所提出的 2D-FT 算法的视角大于 25°，并且比 DAS 快五倍，比 MUSIC 快二十倍。实现的雷达具有 55cm 的距离分辨率和 14°的角度分辨率，能够正确识别现实场景中单目标和多目标的位置，误差低于 20cm。
