首页 | 本学科首页   官方微博 | 高级检索  
     检索      

基于矢量线阵的目标低频线谱提取方法
引用本文:李海涛,王易川,孙世林,程玉胜,程健.基于矢量线阵的目标低频线谱提取方法[J].应用声学,2020,39(2):259-267.
作者姓名:李海涛  王易川  孙世林  程玉胜  程健
作者单位:海军潜艇学院 青岛 266199,海军潜艇学院 青岛 266199,海军潜艇学院 青岛 266199,海军潜艇学院,海军潜艇学院
基金项目:国家自然科学基金项目(61531018)。
摘    要:主动声呐系统常采用线性调频信号探测水下目标。利用分数阶傅里叶变换处理线性调频回波时,可在低信噪比和强混响背景下获得目标参数的有效估计。主动声呐系统常通过增大发射信号的时间带宽积来提升系统的距离分辨力和速度分辨力,但却带来了计算复杂度的显著增加,尤其是奈奎斯特采样下基于分数阶傅里叶变换的回波处理方法,导致数据处理时间难以满足功耗和体积受限的无人水下航行器平台的实时性要求。针对此问题,该文提出分数阶傅里叶变换的带通采样实现方法,通过对线性调频信号时频特性直线在分数阶域的投影进行修正,使利用分数阶傅里叶变换方法处理带通采样的回波数据时,可获得正确的目标参数估计。计算机仿真数据和无人水下航行器湖试数据处理结果验证了分数阶傅里叶变换的带通采样实现方法的正确性,数据处理时间能够满足无人水下航行器平台处理的实时性要求。

关 键 词:带通采样  分数阶傅里叶变换  线性调频信号  主动声呐
收稿时间:2019/7/1 0:00:00
修稿时间:2020/2/25 0:00:00

Fusion extraction method of target low frequency line spectrum based on vector sensor line array
Li Haitao,Wang Yichuan,Sun Shilin,Cheng Yusheng and Cheng Jian.Fusion extraction method of target low frequency line spectrum based on vector sensor line array[J].Applied Acoustics,2020,39(2):259-267.
Authors:Li Haitao  Wang Yichuan  Sun Shilin  Cheng Yusheng and Cheng Jian
Institution:Navy Submarine Academy,Navy Submarine Academy,Navy Submarine Academy,Navy Submarine Academy and Navy Submarine Academy
Abstract:The extraction problem of low frequency line spectrum of VLA tracking target is studied. A complete VLA low frequency line spectrum fusion extraction method is proposed. It is proposed that the mean square error multiplied by a scale factor can be used to set the threshold. Spectral components, and the use of high-signal-to-noise ratio line-spectrum direction-finding method to eliminate the interference line spectrum method to accurately extract the target feature line spectrum is studied, which effectively solves the problem of mutual interference of low-frequency line spectrum features of VLA port and starboard targets. Simulation and sea trial data verify the effectiveness of the proposed method.
Keywords:VLA  low  frequency line  spectrum  fusion  extraction
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《应用声学》浏览原始摘要信息
点击此处可从《应用声学》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号