中文摘要：

为了避免多波束测深声呐输出数据中产生测深假象,分析了海底多波束测深声呐中存在的隧道效应及其产生机理,指出旁瓣干扰是引起隧道效应的重要因素,隧道效应的出现导致多波束测深声呐把相对平坦的海底绘制成凹面向上的水平半圆柱面海底地形.采用系统辨识模型仿真了基于先验误差的误差反馈递归最小二乘（RLS）Laguerre格型算法的极点位置对算法性能的影响,并利用该算法对湖试数据中存在的隧道效应进行分析处理.结果表明通过对Laguerre极点的选择,该算法能够有效消除多波束测深数据边缘波束中存在的旁瓣干扰并快速跟踪真实的海底回波,同时又能保留中央波束信号能量,减少对真实信号的影响.

英文摘要：

The tunnel effect causes potentially dangerous bathymetric artifacts in multi-beam bathymetric sonar data.To rectify this,its causes were analyzed and its mechanism of production in multi-beam bathymetry sonar determined.Side lobe interference was found to be an important factor causing the tunnel effect.The emergence of the tunnel effect can lead to multi-beam bathymetry sonar mistaking an area of relatively flat seafloor for horizontal half cylindrical terrain with concave up.Based on priori errors on algorithm performance,the influence of pole choice on error feedback in the recursive least square（RLS）Laguerre lattice algorithm was simulated with a system identifying model.Experimental data from lakes in which the tunnel effect was presented was processed using the RLS-Laguerre lattice algorithm.The results showed that the algorithm,through the choice of Laguerre pole,can effectively eliminate side lobe interference in edge beams and speed up actual seafloor returns.It also better retains the signal energy of the central beam,reducing effects on the real signal.