盲源分离与波束形成融合抑制方向性强干扰研究
发布时间：2018-09-08 15:05
【摘要】：针对强干扰严重影响线列阵声纳弱目标检测的问题,融合盲源分离(Blind source separation,BSS)与波束形成提出了一种抑制方向性强干扰的方法.首先在干扰方位形成波束得到干扰信号估计,然后对阵列接收信号的每个子带采用盲源分离方法得到分离信号和解混矩阵估计,并通过对分离信号和干扰信号进行子带谱相关抑制干扰,再将抑制干扰后的分离信号重构回阵元域信号,最后采用波束形成方法完成目标方位估计.利用模拟器数据和海试数据对方法进行了验证,结果表明,该方法能有效地抑制方向性强干扰,明显提高了弱目标信号的空间谱能量,增强了声纳检测弱目标的能力.
[Abstract]:Aiming at the problem that strong interference seriously affects the detection of weak targets in linear array sonar, a method of suppressing directional strong interference is proposed by combining blind source separation (Blind source separation,BSS) with beamforming. First, the interference signal is estimated by beamforming at interference azimuth, and then each subband of the received signal of the array is estimated by blind source separation method. The separated signal is reconstructed by subband spectral correlation to suppress the interference. Finally, the beamforming method is used to estimate the target azimuth. The simulation data and sea test data are used to verify the method. The results show that the method can effectively suppress the strong directional interference, improve the spatial spectral energy of the weak target signal, and enhance the ability of sonar to detect the weak target.
【作者单位】： 海军大连舰艇学院信息作战系水声与水声对抗教研室;
【基金】：声纳技术国家级重点实验室开放基金资助(KF201106)~~
【分类号】：TN973
[Abstract]:Aiming at the problem that strong interference seriously affects the detection of weak targets in linear array sonar, a method of suppressing directional strong interference is proposed by combining blind source separation (Blind source separation,BSS) with beamforming. First, the interference signal is estimated by beamforming at interference azimuth, and then each subband of the received signal of the array is estimated by blind source separation method. The separated signal is reconstructed by subband spectral correlation to suppress the interference. Finally, the beamforming method is used to estimate the target azimuth. The simulation data and sea test data are used to verify the method. The results show that the method can effectively suppress the strong directional interference, improve the spatial spectral energy of the weak target signal, and enhance the ability of sonar to detect the weak target.
【作者单位】： 海军大连舰艇学院信息作战系水声与水声对抗教研室;
【基金】：声纳技术国家级重点实验室开放基金资助(KF201106)~~
【分类号】：TN973
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