高射速武器弹丸群雷达目标识别仿真研究

Simulation of High Speed Artillery Projectile Cluster Target Resolution

由于超高射速武器弹丸射速高、波束内同时存在多目标,群目标分辨应对弹丸的初速进行准确测量。为提高识别精度,采用时间-距离-频率的三维分辨技术做为解决超高射速目标分辨问题的一种有效方法。利用Simulink软件平台进行群目标分辨系统仿真建模,分析并验证了基于伪码测距的距离-时频三维分辨方法的正确性。针对伪码调制-相关解调体制造成的频谱泄漏问题,选取合适的带通滤波器参数,滤除了离目标谱线较远的"伪随机码周期谱线",并通过调整雷达摆放位置,减小了加速度分量造成的多普勒模糊,为雷达目标识别优化提供了参考。

SIMULINK has a rich library of standard modules, but not all of the simulation systems can be set up through the standard modules, its custom module implements the function extension of SIMULINK. By studying the working principle of S-function, this paper introduced a basic algorithm of S-function to create and encapsulate the custom module, and used M-file S-function basic framework resources to write pseudo-random code signal M source file. By analyzing the signal characteristic of pseudo-random code phase modulation signal, we achieved the rapid generation of pseudo-random code phase modulation continuous wave signal. Simulation results show that the custom module extends SIMULINK simulation capabilities, and we provided a new generating method of radar signal source, which makes great convenience for the use and research of engineering personnel.