子阵间约束自适应和差单脉冲测角算法

Algorithm for constrained adaptive sum-difference monopulse among sub-arrays

提出了一种子阵间约束自适应和差单脉冲测角算法.该方法先联合各子阵和波束输出进行自适应处理,形成合成的自适应和波束,再对各子阵差波束输出进行自适应处理并同时约束单脉冲比,得到合成的约束差波束.由于在差波束自适应权形成中增加了全阵列单脉冲比约束,新方法自适应抑制主副瓣干扰的同时还能较好地保持单脉冲比不失真,并克服了子阵自适应处理带来的孔径损失,提高了目标角度的估计精度.计算机仿真实验证明了该方法的有效性.

A constrained adaptive sub-array sum-difference monopulse algorithm was presented. Adaptive processing was first conducted for all sum beams of sub-arrays and then for all difference beams of sub-arrays adding monopulse ratio constraint, which yielded adaptive sum beam and con- strained difference beam respectively. Since the monopulse ratio constraint was imposed on whole ar- ray during calculating adaptive weight of difference beam, the new algorithm could null the mainlobe and sidelobe jammers effectively while keeping adaptive monopulse ratio undistorted. Moreover, the aperture loss due to sub-array was overcome. So the estimation accuracy of the target angle was im- proved. The simulation experiments have illustrated the validity of the proposed algorithm.