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

基于WVD的超声海流信号瞬时频率的计算
引用本文:李传学,姜楠,姜伟棣.基于WVD的超声海流信号瞬时频率的计算[J].海洋技术,2007,26(3):42-43,63.
作者姓名:李传学  姜楠  姜伟棣
作者单位:1. 天津大学管理学院,天津,300072;天津航海仪器研究所,天津,300131
2. 吉林大学计算机教学中心,吉林,长春,130026
3. 中国计量学院理学院,浙江,杭州,310018
基金项目:国家海洋局青年海洋科学基金资助项目(2005410)
摘    要:给出了一种简化的超声海流信号仿真模型,利用WVD计算其瞬时功率密度,取瞬时功率密度的最大值作为其瞬时频率的估值。仿真结果表明,高信噪比(超过30 dB)情况下可以利用WVD估计超声海流信号的瞬时频率。

关 键 词:海流  瞬时频率  WVD
文章编号:1003-2029(2007)03-0042-03
收稿时间:2007-03-18
修稿时间:2007-03-18

Instantaneous Frequency Estimation on Ultrasound Seawater Flow Signals Based on the WVD
LI Chuan-xue,JIANG Nan,JIANG Wei-di.Instantaneous Frequency Estimation on Ultrasound Seawater Flow Signals Based on the WVD[J].Ocean Technology,2007,26(3):42-43,63.
Authors:LI Chuan-xue  JIANG Nan  JIANG Wei-di
Institution:1. School of Management Tianjin University, Tianjin 300072, China; 2. Tianjin Navigation Instruments Institutes, Tianjin 300131, China; 3. Center of Computer Teaching and Research, Jilin University, Changchun 130026, China; 4. Institute of Science, China Jiliang University, Hangzhou 310018, China
Abstract:A simplified simulation model of an ultrasound seawater flow signal on ADCP(Acoustic Doppler Current Profiler) is proposed,and instantaneous power spectrum of that model is obtained using the WVD(Wigner-Ville Distribution),and instantaneous frequency of that model is obtained by the maximum of the power spectrum.Simulation results show that the WVD is applicable to instantaneous frequency estimation on the ultrasound seawater flow signal with a signal-to-noise ratio higher than 30dB.
Keywords:seawater flow  instantaneous frequency  Wigner-Ville Distribution
本文献已被 CNKI 维普 万方数据 等数据库收录!
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