高分辨雷达成像目标模拟系统均衡方法研究

Research on Equalization Algorithm for High Resolution Radar Imaging Target Simulation System

宽带高分辨雷达成像模拟系统一般存在带内幅相非线性失真,会影响系统的成像模拟精度。因此,需要进行均衡补偿。通过研究传统射频阵列系统幅相补偿方法,提出了一种基于FFA级联的并行均衡方法。该方法采用多路并行、高效数字信号处理单元代替传统补偿表提升雷达成像目标模拟精度。仿真结果表明,在保证目标角模拟精度情况下,本文方法能够实现对成像目标的有效模拟。

Equalization compensation is required for the wide-band high-resolution radar imaging simulation system due to the influence of in-band amplitude and phase nonlinear distortion on the accuracy of the system.By studying the amplitude and phase compensation method of the traditional radio frequency(RF)array system,a parallel equalization method based on FFA cascade is proposed in this paper.Instead of compensation table being used,multi-channel parallel high-efficiency digital signal processing unit is used to improve the accuracy of radar imaging target simulation.The simulation results show that the proposed method can effectively simulate the imaging target while ensuring the accuracy of angle simulation.