改进的基于旁瓣对消的单脉冲测角算法

摘要

研究了基于自适应广义旁瓣对消技术的单脉冲角度跟踪算法.在自适应广义旁瓣对消器(General sidelobecanceller,GSC)结构下,当存在指向误差的时候,阻塞矩阵不能完全阻塞期望信号,导致辅助支路上产生期望信号泄露,从而使得单脉冲角度跟踪性能下降.为了解决此问题,提出了一种基于辅助支路子空间投影的算法,该算法利用了期望信号空间和干扰空间正交的特点,减少了泄露的期望信号对波束形成性能的影响,从而保证了单脉冲角度跟踪的性能.理论分析和仿真结果表明了该算法的有效性和优越性.%Monopulse angle estimation algorithm based on adaptive sidelobe canceller is analyzed. Because of the mismatch problem, the interested signal cannot be completely cancelled by blocking matrix, thus resulting in the leakage of the interested signal in an auxiliary channel. The performance of monopulse angle estimation also degrades as a result. To solve the problem, an improved method is proposed. Orthogonality relationship between signal space and interference space is used in this method to reduce the effect of leakage of the interested signal in the auxiliary channel. Theoretical analysis and simulation results are given to prove the effectiveness and superiority of the method.