分布式数字合成阵列主辅波束优化

Optimization of Main and Auxiliary Beams in the Distributed Digital Synthesizing Arrays

针对分布式数字合成阵列中高副瓣效应导致的多目标探测困难的问题,给出了一种分布式数字接收阵列合成的总体设计技术,一方面利用凸优化数字波束加权设计方法,抑制主波束副瓣;另一方面利用副瓣匿影技术及多匿影波束分段设计方法,实现对副瓣方向干扰的抑制。文中通过检测理论和数值计算给出了系统性能分析,并通过两部合成数字阵列的外场跟飞试验验证了方法的有效性。

To tackle the difficulty of multiple targets detection due to the high level side-lobe in the digital distributed synthesizing arrays,this paper proposes a system approach to design the distributed radar system：on one hand,the convex optimization method for the digital beamforming weight design is used to suppress the side-lobe of the main beam;on the other hand,the side-lobe blanking（SLB） technique and the piecewise SLB beam designing method are utilized to blank the target echoes from the side-lobe.In this paper,the performance of the designed system is evaluated by theoretic analysis and simulation,and the method is also validated by the experiment of two distributed synthesizing arrays tracking the planes.