Design and implementation of LFMCW radar target detection system based on Zynq

2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation (APCAP) Pub Date : 2022-11-04 DOI:10.1109/APCAP56600.2022.10069759

M. Tang, Dalong Xu, Wenwen Xu, Hongya Wang, Xiang Li, Liang Qi

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Abstract

With the improvement of linear frequency modulation continuous wave (LFMCW) radar signal processing theory and the advent of Xilinx Zynq-7000 series chips, LFMCW radar has more and more flexible ways to realize. In this paper, a LFMCW radar target detection system based on Zynq platform is designed and implemented, which has high integration, low cost and small size. The system makes full use of the advantages of Zynq-7000 platform, uses the Processing System(PS) part of Zynq-7000 to flip the data of range dimension Fast Fourier Transform(FFT), and transfers the flipped data to Progarmmable Logic (PL) part through Direct Memory Access (DMA) to realize Moving Target Detection (MTD) and Order Statistic Constant False Alarm Rate(OS-CFAR). MTD is implemented by slow time dimension FFT, while the implementation of OS-CFAR needs to consider the characteristics of PL parallel execution, that is, the thinking mode of parallel sorting is used in the sorting steps of OS-CFAR, and the area is used to exchange less processing time to ensure the real-time performance of the whole system.

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基于Zynq的LFMCW雷达目标检测系统的设计与实现

随着线性调频连续波(LFMCW)雷达信号处理理论的完善和Xilinx Zynq-7000系列芯片的问世，LFMCW雷达的实现方式越来越灵活。本文设计并实现了一种基于Zynq平台的LFMCW雷达目标检测系统，该系统具有集成度高、成本低、体积小的特点。该系统充分利用Zynq-7000平台的优势，利用Zynq-7000的处理系统(PS)部分对距离维快速傅里叶变换(FFT)数据进行翻转，并将翻转后的数据通过DMA (Direct Memory Access)传输到可编程逻辑(PL)部分，实现运动目标检测(MTD)和阶统计恒虚警率(OS-CFAR)。MTD采用慢时间维FFT实现，而OS-CFAR的实现需要考虑PL并行执行的特点，即在OS-CFAR的排序步骤中采用并行排序的思维方式，利用面积换取较少的处理时间，保证整个系统的实时性。

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2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation (APCAP)

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