摘要
矩阵滤波技术是通过设计一个全局优化的空域滤波器,使得该滤波器对不感兴趣的区域响应尽可能小,对感兴趣的区域响应尽可能不失真,基于该原理可以消除阻带区域的干扰噪声,并且保留通带区域的弱目标信息,是一种比较实用的弱目标定位检测方法,但其定位精度受很多因素制约。本文首先介绍最小二乘矩阵滤波器的设计原理、匹配场噪声抑制原理及归一化通阻带误差的计算公式,然后针对矩阵滤波器应用于海底水平阵的方法,分别从声源频率、阵元个数和阵元间距3个方面分析研究影响海底水平阵性能的因素,总结出使滤波器能够达到比较好的滤波状态时的因素条件,进而提高滤波性能。
Matrix filtering technique is adopted to design a global optimal spatial filter,which minimizes response not interested in and maximize response interested in as much as possible. Based on the theory,the filter can clear up noise in the stop band region while retain information of weak target in the normalized band region. It is a kind of practical method to detect weak target,but positioning accuracy is affected by many factors. This paper firstly introduces the design principle of the least square matrix filter,the principle of the matched field noise suppression and the calculation formula of the normalized band error and stop band error. Then in the light of the method of the matrix filter applied to bottom-mounted HLA,analyze the factors influence the capabilities of the bottom-mounted HLA in three different ways of frequency of sound source,number of array elements and array element spacing. Respectively conclude the best factors and conditions that the filter can be in a better filtering state,and then improve the filtering capabilities.
出处
《舰船科学技术》
北大核心
2014年第9期74-79,共6页
Ship Science and Technology
基金
国家自然科学基金资助项目(61271443)
关键词
矩阵滤波器
海底水平阵
声源频率
阵元个数
阵元间距
matrix filter
bottom-mounted HLA
frequency of sound source
number of array elements
array element spacing
