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中文核心期刊

斜视合成孔径声呐成像研究

Study on the imaging of squint synthetic aperture sonar

  • 摘要: 在论述斜视合成孔径成像及其进展的基础上,分析了正侧视情况下延时相加的模型及斜视对它的影响,将延时相加法分为“有效孔径处理”和“盲处理”两种实现方法,并提出斜视模式有效孔径计算数学模型。斜视出现时,参与方位向波束形成的有效孔径的定位会出现错误,使图像产生失真。斜视模型可对有效孔径正确定位,从而得到正确的图像。仿真实验及湖试结果验证了模型的有效性。

     

    Abstract: Synthetic aperture imaging with squint mode and its advances are presented, and the imaging of broadside and squint mode on sum-delay algorithm is discussed. Effective aperture processing and blind processing for the sum-delay algorithm are described, and a mathematical model for the calculation of effective aperture is suggested. When squint receiving arrays exist, broadside model can not locate effect aperture correctly, and consequently, a degraded image may occur. The suggested model can correctly locate the effect aperture, and the computer simulations and results from lake experiments validate the method.

     

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