二维面阵子阵划分及PADBF算法研究

摘要

The two-dimension planar array subarray division method and the improved partially adaptive digital beam forming( PADBF) algorithm were studied. Partially adaptive digital beam forming technology is based on subarray division. In order to reduce subarray architecture complexity, this paper presented the two-dimension planar array subarray division method that combines noise power normalization and genetic algorithm. This subarray division method allows the same sub-array elements in close proximity while avoiding grating lobes appear. An improved PADBF algorithm based on normalization method was also introduced that can improve beam sidelobe level markedly and suppress jammer effectively. Through the establishment of two-dimension planar array signal model with the proposed method, the computer simulation results demonstrate the effectiveness of the proposed method.%在雷达系统抗干扰优化问题的研究中,自适应数字滤波为主要手段.应用二维面阵子阵划分方法与部分自适应数字波束形成算法中,子阵划分是部分自适应数字波束形成技术为基础.针对二维面阵子阵划分,对降低子阵划分工程实现复杂度大,提出了等功率噪声法与遗传算法(GA)相结合的子阵划分方法,可使同一子阵单元紧密相邻同时避免栅瓣出现.为改善子阵级部分自适应数字波束形成波束旁瓣电平,采用归一法的部分自适应数字波束形成算法,可有效地对干扰进行抑制,显著改善波束旁瓣电平.通过建立二维面阵信号模型,对所提方法进行了计算机仿真,仿真结果证明了所提方法的有效性,可为雷达系统性能优化提供了依据.