毫米波雷达导引头频域高分辨技术研究

Study on the High Frequency Resolution Technology on the MMW Radar Seeker

提出在强海杂波环境下利用频域高分辨技术提高末制导雷达对弱小目标的分辨能力。文中首先分析了频域高分辨原理,然后推导了比例导引方式下雷达导引头频域高分辨的实现条件,明确了系统的频域分辨率大于目标的多普勒频差是实现频域高分辨的先决条件,并给出了目标的多普勒频差与弹目距离、弹目速度、迎头角以及目标长度的关系,最后给出了仿真实验结果,结果表明系统的分辨率达到10Hz时,可以对弱小目标实现频域高分辨。

The high frequency resolution technology is proposed in this paper, which can improve the resolving power to the small target of the terminal guidance radar in the strong ocean clutter background. The principle of the high frequency resolution is first analyzed, and then the realization conditions of the high frequency resolution are deduced in detail. The primal qualification that the system relation is not small than the Doppler difference of the target is confirmed. The relation between the frequency difference of the target and the factors such as missile-target radial range, missiletarget radial velocity, head-on angle and target size is also given. Finally, the simulation results showed that when the radar resolution achieved 10Hz, it can realize the high resolving of the small target in the frequency domain.