一种低计算复杂度的球面稀疏阵列优化算法

An Optimization Algorithm for Thinned Spherical Arrays with Low Computation Complexity

传统稀疏阵列优化算法的计算复杂度高,对球面相控阵列的工程实现有很大影响。基于半球面共形阵列,给出了一种低复杂度的稀疏优化算法:位于半球面中间的阵元满阵分布,其他位置阵元均匀随机分布。通过计算机仿真,对满阵分布的层数进行了优化。仿真结果表明,所提算法能够有效降低旁瓣电平,且优化后的阵列仍关于球面中心对称分布。

The high computation complexity of traditional optimization algorithms has a strong impact on engineering realization for thinned spherical arrays. In this paper,an optimization algorithm with low complexity for thinned array is presented based on conformal half-spherical arrays. Elements are located fully at the middle of the spherical arrays,and located uniform randomly at the other positions. Further,the number of layers with full arrays is optimized through computer simulation. The results show that the proposed algorithm can effectively reduce the side lobe level,and the optimized arrays are still symmetrical about the center of the spherical surface.