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A Method to Improve Cross-azimuth Detection of Weak Targets under Strong Interference

机译:一种改进强度干扰下弱目标跨方检测的方法

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Sub-band Peak Energy Detection (SPED) is a passive sonar detection method that can effectively distinguish two azimuths when the targets’ bearings are close. It can improve the bearing resolution of the bearing time recorder (BTR). However, its performance is affected by the beam width and side lobe level of beams. The performance of SPED will be greatly decreased so that it is difficult to detect weak target, especially when the energy of two targets is obvious. In order to solve the problem of detection and estimation of weak targets under the strong interference, an extended band with sub-band peak accumulate detection (E-SPAD) method is proposed based on SPED. Through signal processing of acoustic data from real lake trial, verified that the method can improve the detection ability and the accuracy of the azimuth estimation of weak targets, and further improve the display effect of BTR.
机译:子带峰值能量检测(SPED)是一种被动声纳检测方法,当目标的轴承接近时,可以有效地区分两个方位角。 它可以改善轴承时间记录器(BTR)的轴承分辨率。 然而,其性能受光束宽度和侧叶电平的影响。 SPED的性能将大大降低,以便难以检测弱目标,特别是当两个目标的能量显而易见时。 为了解决强干扰下弱目标的检测和估计的问题,基于SPED提出了具有子带峰值累积检测(E-SPAD)方法的扩展带。 通过来自Real Lake试验的声学数据的信号处理,验证了该方法可以提高弱目标的方位角估计的检测能力和准确性,进一步提高BTR的显示效果。

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