噪声抵消法估计和抑制声呐部位主要自噪声

Estimating and rejecting the main self-noise of sonar-position by noise cancelling method

本文采用修正格型过滤自适应噪声抵消方法，成功地抑制艇艄声呐部位自噪声中的螺旋桨噪声成分等，抑制效果达４０ｄＢ以上。所采用的经改进后的ＬＳＬ算法收敛速度快，精度高，具有宽带抑噪性能。利用上述噪声抵消系统（软件）分析、判别了各噪声源对艇艏声呐部位声场的贡献，在确定主要噪声源方面，获得比较满意的结果。

The propeller noise in the self noise of ships head sonar position is successfully rejected atabove 40 dB by means of the noise cancelling method with revised adaptive lattice filter in this paper.The improved LSL algorithm is characterized by rapid convergence, high accuracy, and widecaband noiserejecfion. The above mentioned noise cancelling system (software) is used to the contribution of eachnoise source for the self-noise field of sonar position and satisfactery results are abtained on determiningmain noise source.