近场波束零陷权声图测量干扰抑制技术

聚焦波束形成声图测量技术是一种近场高精度声被动定位技术.为了抑制近场声图测量过程中干扰声源对待检测声源定位的影响,给出了一种基于近场聚焦波束零陷权的声源干扰抑制方法.经过理论推导分别给出了权在窄带信号情况下和宽带信号情况下的解析形式,该权具有形式简单,计算量小等优点,适合实际工程应用.对权的性能进行了仿真及实验验证,结果表明,该权可以有效地在近场干扰声源位置上形成指向性零点,从而抑制掉干扰声源对声图测量的影响,改善对待探测声源的声图测量效果.

The near field focus null-forming weight interference sound sources suppression technology of the underwater acoustic image measurement

Underwater acoustic image measurement technology which uses the focused beam-forming method is a high-precision passive positioning technology in the near field.To suppress the influence of the interference sound sources on the positioning of the sound source which is to be measured in the near field,underwater acoustic image measurement,a new interference suppression method based on the near field focus null-forming weight,was presented.The focused null-forming weight analytic expressions of the narrow band signal and the broad band signal were derived in theory,having the characteristics of simple form and low computational complexity.Furthermore,these characteristics help the weight to adapt to real engineering application.The capability of the weight was validated by simulation and experimentation,which showed that the focus null-forming weight can be used for suppressing the influence of the interference sources on the underwater acoustic image measurement by forming a directive zero point.Thus,this method can be used to improve the underwater acoustic image measurement results of the target sound sources.