基于FPGA的LFM雷达系统的多目标检测实现

Implementation of Multi-Target Detection of LFM Radar System Based on FPGA

摘要: 通过硬件设计和信号处理算法的有效结合，利用FPGA实现频域上的脉冲压缩，根据实际需求设计雷达参数，实现对多目标的检测。与传统的电路作比较，FPGA在信号处理和复杂算法加速等方面的优势，在高速的同时也解决了灵活性不足的问题。对线性调频信号以及脉冲压缩基本原理的研究，通过使用MATLAB产生回波信号，将其传输到设计好的FPGA电路中，最后将处理后的数据传回MATLAB画出距离–速度二维图，与仿真结果进行对比。实验结果验证了FPGA实现的频域匹配滤波能够拥有较好的测距和测速能力，硬件加速在提高雷达系统性能方面有出色的性能和广泛的应用前景。

Abstract: By effectively combining hardware design and signal processing algorithms, utilizing FPGA to achieve pulse compression in the frequency domain, designing radar parameters according to actual needs, and achieving detection of multiple targets. Compared with traditional circuits, FPGA has advantages in signal processing and complex algorithm acceleration, solving the problem of insufficient flexibility while maintaining high speed. Research on the basic principles of linear frequency modulation signals and pulse compression, using MATLAB to generate echo signals, transmitting them to the designed FPGA circuit, and finally sending the processed data back to MATLAB to draw a distance velocity two-dimensional graph for comparison with simulation results. The experimental results have verified that the frequency domain matched filtering implemented by FPGA can have good ranging and speed measurement capabilities, and hardware acceleration has excel-lent performance and broad application prospects in improving radar system performance.