摘要
波导不变量是一个与环境特性和传播特性有关的物理量,对其准确估计有重要意义。结合LOFAR图和方位-时间历程图,提出了利用Hough变换进行波导不变量和目标航向角联合估计算法,该算法无需知道运动目标的距离信息,不要求目标有最近通过距离。提出了综合Hough变换参数估计算法,较提取单条纹参数估计算法有更好的稳健性,但增加了计算开销。仿真研究和海试数据分析均验证了算法的可行性,并表明该参数估计算法有较高的估计精度。
Accurate estimation of the waveguide invariant is significant,for it is a physical parameter demonstrating the propagation characteristics and environmental characteristics of the waveguide.Hough Transform-based joint wave-guide invariant and heading angle estimation algorithm is proposed by combining LOFARgram and bearing-time records,in which neither the distance information nor the closest point of approaching the moving target is needed,.Then the synthetic parameter estimation algorithm based on Hough Transform is presented,which is more robust than the parameter estimation algorithm with single interference striation,but with more computational cost.The feasibility of the parameter estimation algorithm is validated by both computer simulation and sea trial data analysis,which also indicate that the parameter estimation algorithm has high precision.
出处
《声学技术》
CSCD
2012年第6期559-565,共7页
Technical Acoustics
关键词
低频声场干涉结构
波导不变量
参数估计
HOUGH变换
interference structure of low-frequency acoustic field
waveguide invariant
parameters estimation
Hough transform
