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一种新型自适应天线的空间谱估计性能分析

Keywords: 自适应天线菲涅尔相位修正平板空间谱估计极大似然估计克拉美-罗界阵列输出特性

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Abstract:

利用菲涅尔区相位修正聚焦结构和馈源阵列构成一种新型的多波束自适应天线。本文深入分析了基于该天线的阵列输出特性,与基于均匀线形阵的空间谱估计技术比较的基础上,揭示了其良好的去相关性能。最后应用极大似然估计算法实现了相干信号源在大角度入射的情形下,菲涅尔平板天线对来波方向的有效估计,从而避免了应用MUSIC算法进行来波方向估计时所遇到的观察区域的限制问题。仿真计算的结果表明菲涅尔平板天线良好的空间谱估计性能。

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