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基于相位校正的零点约束直达波抑制方法

DOI: 10.3969/j.issn.1006-7043.201305038

Keywords: 双基地声呐, 零点约束, 直达波抑制, 强直达波干扰, 相位校正, 波束形成

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Abstract:

在收发分置的系统中,直达波干扰抑制一直是系统的关键技术之一。强直达波干扰本质上是一种典型的强相干干扰。针对双、多基地声呐中的直达波干扰进行了讨论,提出了利用零点约束波束形成进行直达波抑制的方法。该方法通过在直达波的方位附近设置零点对直达波进行抑制,从而估计出目标的方位。鉴于该算法对直达波的相位信息有严苛的要求,提出了基于直达波相位校正的改进方法,提高了算法在实际应用中的宽容性,并通过计算机仿真以及水池试验验证了有效性。

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