低慢小目标的探测跟踪是雷达领域的难题;圆阵雷达在跟踪变速运动的无人机目标时,往往会因为积累能量扩散等问题导致跟踪不稳定、易断航等现象。文中充分挖掘圆阵雷达自适应数据率跟踪的潜力,将目标实时信噪比引入跟踪环路内,通过长时间相参积累脉冲组作为补救跟踪措施提升目标机动航段的跟踪稳定性。同时,通过Keystone 变换和Dechirp 算法校正长时间照射引起的距离徙动和多普勒扩散问题。数值仿真分析和圆阵雷达实测均验证了该方法的有效性。

The detection and tracking of low, slow and small targets is a difficult problem in the field of radar. When a circular array radar tracks unmanned aerial vehicle targets with variable speeds, it often leads to tracking instability and breakage due to the problem of energy diffusion during accumulation. In this paper, the adaptive data rate tracking potential of circular array radar is fully exploited, the target signal-to-noise ratio is introduced into the tracking loop, and the long-term coherent accumulation pulses are used as the remedial tracking beam to ensure stable tracking in the target maneuvering section. At the same time, the range migration and Doppler diffusion caused by long-term irradiation are corrected by Keystone transform and Dechirp algorithm. Numerical simulation and experimental results based on circular array radar show that the proposed method is effective.

TN957.3