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自适应波束形成技术

于 2023-07-27 发布 文件大小:3.27 kB
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应用背景波束形成技术是阵列信号处理中的重要研究领域。阵列信号的发展史最早可追溯到40年代的自适应天线组合技术,它使用锁相环进行天线跟踪。波束形成的具体步骤是:通过将各阵元输出进行加权求和,在一时间内将天线阵列波束“导向”到一个方向上,对期望信号得到最大输出功率的导向位置即给出波达方向估计关键技术整个过程可以通过迭代方法直到满足预先设定的收敛条件实现。估计的初值可以通过McCulloch法得到。上面的回归估计是一致收敛和渐近无偏的。根据Koutrouvelis的仿真结果,可知:回归法优于分位数法。回归法的计算量最小,比较容易实现。

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