针对水面水下目标分辨的问题，可从波导中不同布放深度的2个接收水听器的声压互谱的正负判决来分辨水面水下目标。但如果2个接收水听器的位置选择不当，正负判决的临界深度会随着声源与接收之间的距离变化而起伏变化，从而对结果产生干扰。本文从简正波模型出发，详细分析了声压互谱的有功分量和无功分量与目标深度的关系，提出用无功分量来对有功分量进行补偿，能得到不随距离变化而起伏变化的临界深度，从而提升水面水下目标分辨的正确率。本文还进行了抗噪声分析，将本文方法应用于垂直阵在噪声干扰下仍能得到较好结果。理论分析和仿真结果都验证了本文方法的正确性。
The sign of the sound pressure cross-spectrum active component can be used to distinguish underwater target by the receiving transducers in different depths. But if the receiving transducers is not placed in appropriate depth, the critical depth of the sign of the sound pressure cross-spectrum is not independent of range, which has a influence on the result. This paper analyzes the relationship between the depth of the target and the active component and reactive component of the sound pressure cross-spectrum in detail and proposes a way to distinguish surface and underwater target using the compensation of reactive component. The critical depth is not independent of range in the way. This paper also analyses the influence of noise and it can get a good result in the influence of noise with vertical array. Both theory and simulation prove the correctness of this method.
2016,(s1): 193-198 收稿日期：2016-08-12
DOI：10.3404/j.issn.1672-7619.2016.S1.036
分类号：U666.7
作者简介：王超(1989-),男,助理工程师,研究方向为水声信号处理。
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