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基于高阶循环统计量和线性预测的虚拟孔径扩展DOA估计

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摘要 本文提出一种新的多径信号DOA估计方法----基于高阶循环统计量和线性预测的虚拟孔径扩展DOA估计算法。首先构造阵列接收信号的四阶循环累积量矩阵并估计其广义舵矢量,进而基于前后向线性预测(FBLP)估计每组多径信号的DOA,以进一步提高分辨力。该方法与扩展虚拟ESPRIT算法(即EVESPA)相比,兼有高阶累积量和循环统计量的优点,具有信号选择性和更强的抑制复杂噪声/干扰的能力;在小样本情况下估计空间距离较近的多径方向具有更高的分辨力;用包含K阵元均匀线阵的任意阵列所能接收的信号总数可以超过2K(K-1)/3个,适于信号数大大多于阵元数的情况。
作者 姜宏 王树勋
出处 《中国高校科技与产业化》 2006年第z1期222-226,共5页 Chinese University Technology Transfer
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