一种PD雷达脉间运动补偿方法及FPGA实现

A motion compensation method for PD radar and its implementation based on FPGA

摘要:

对动目标回波的包络走动和相位偏移进行了理论推导，提出了一种脉冲多普勒(PD)雷达脉间运动的补偿算法，阐述了该算法的现场可编程门阵列(FPGA)实现结构。基于中频回波的处理流程，算法适用于对线性调频(LFM)脉冲进行去斜处理的PD雷达。利用Matlab和Modelsim对该方案进行了联合仿真验证，分析了它的有效性和补偿性能。

Abstract:

A motion compensation algorithm is proposed for Pulse Doppler(PD) radar, and its implementation is described based on Field-Programmable Gate Array(FPGA). The algorithm applies to radars for processing Linear Frequency Modulation(LFM) signal by dechirp method. Firstly, the theory of moving target’s envelope movement and phase shift is deduced, and the motion compensation algorithm is put forward. Secondly, following the clue of IF echo processing, the algorithm implementation is described in detail based on FPGA. Finally, the algorithm effectiveness and its implementation are verified by Modelsim and Matlab co-simulation, and its compensation performance is analyzed.