【作者】 刘晓； 李海森； 周天；

【Author】 LIU Xiao,LI Haisen,ZHOU Tian (Science and Technology on Underwater Acoustic Laboratory,Harbin Engineering University,Harbin 150001)

【机构】 哈尔滨工程大学水声技术重点实验室；

【摘要】 针对现有以分裂子阵技术为基础的多波束测深算法中存在的不足,将应用于三条阵测深侧扫声呐的相位中心互相关技术(PCCCT)思路引入到多波束测深声呐的波束脚印内,提出了一种三子阵相位中心互相关多波束测深新算法。文中对算法原理进行了数学表达式推导和性能分析,并通过计算机仿真、湖上试验数据处理证明了新算法不仅可以提高输出信噪比,降低回波到达角度(DOA)的估计误差,而且能获得连续的水下地形,有效提高地形估计的分辨率,具备实际应用的可行性和有效性。更多还原

【Abstract】 According to the insufficiency of bathymetry algorithm based on split subarray technique for multibeam echo sounder at present,the thought of phase center cross correlation technique(PCCCT) which is used in three-throw bathymetric sidescan sonar is introduced to beam footprint of multibeam echo sounder,and a new three-subarray multibeam bathymetry algorithm based on phase center cross correlation is proposed in this paper.The mathematical expression is derived and the performance is theoretically analysed for the principles of the algorithms.The simulation data and the lake experiment data are processed,and the results prove that the new algorithm not only improves the signal to noise ratio and reduces the estimation err of direction of arrival(DOA) of echo signal but also obtains continuous terrain and efficiently improves the resolution of terrain estimation,and is practical and valid for actual application.更多还原