摘要
分析了海底多波束测深声纳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纳把相对平坦的海底误测成凹面向上的水平半圆柱面海底地形。研究了基于GSC结构的自适应波束形成算法,推导提出了MVDR算法的连续自适应实现方案,并利用该算法对多波束测深声纳湖试数据中存在的隧道效应进行处理,结果表明该算法能够有效削弱多波束测深数据边缘波束中存在的旁瓣干扰。
Analyzed the tunnel effect and its mechanism of production in multibeam bathymetry sonar and pointed out that the side lobe interference was an important factor which caused the tunnel effect,and the emergence of tunnel effect would lead to the multibeam bathymetry sonar mistake relatively flat seafloor for concave-up horizontal half cylinder terrain.Studied on the adaptive beamforming algorithm based on GSC structure,deduced and presented the continuous adaptive realization method,and used the algorithm to process the tunnel effect existed in the lake experiment data.The processing results proved its validity in eliminating the side lobe interference in edge beams of multibeam bathymetric data.
出处
《海洋测绘》
2011年第1期28-31,共4页
Hydrographic Surveying and Charting
基金
国家自然科学基金(60872107)
水声技术重点实验室基金(91407200302100C2005)
国家863计划项目(2007AA09Z124)
中央高校基本科研业务费专项资金(HEUCFR1012)
