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迭代寻优的稳健波束形成

DOI: 10.3969/j.issn.1006??7043.201306015

Keywords: 稳健自适应波束形成, 矩阵滤波器, 迭代优化, 二阶锥规划, 导向矢量

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Abstract:

针对导向矢量失配程度较大时,常见稳健波束形成算法性能下降问题,提出了一种迭代搜索最优导向矢量的稳健波束形成算法。首先利用修正后的导向矢量构造使波束输出功率最大的目标函数,分别从干扰抑制和噪声抑制2个方面推导了新导向矢量应满足的约束条件。给出了利用矩阵滤波思想构造约束条件的方法并分析其合理性。针对优化问题难以求解的问题,提出了一种迭代寻优的搜索方法,将每次迭代转化为求解一次二阶锥规划问题。仿真分析表明,相比于常见稳健波束形成算法,该算法有更高的抗导向矢量失配的稳健性,且需要的先验信息更容易获取。

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