文章摘要
蔡平,王晋晋,范军.基于凸集投影的水声信道辨识算法[J].声学技术,2012,(3):252~257
基于凸集投影的水声信道辨识算法
Underwater acoustic channel identification based on projection onto convex sets
投稿时间:2010-05-04  修订日期:2010-08-20
DOI:
中文关键词: 水声多途信道|凸集投影|信道辨识
英文关键词: underwater acoustic multipath channel  projection onto convex sets  channel identification
基金项目:
作者单位E-mail
蔡平 哈尔滨工程大学水声技术重点实验室, 哈尔滨150001  
王晋晋 哈尔滨工程大学水声技术重点实验室, 哈尔滨150001 wangjinjin@hrbeu.edu.cn 
范军 上海交通大学船舶海洋与建筑工程学院水声工程研究所, 上海200240  
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中文摘要:
      研究了使用凸集投影方法进行水声信道辨识的可行性,给出了凸集投影常用的凸集约束的条件,并推导了在复数域中的凸集约束的表达式.计算机仿真和实验结果证明,在较高信噪比的情况下,使用凸集投影方法可以正确估计水声信道中的多途幅度衰减和相位变化,其分辨率优于传统最大似然估计器-匹配滤波器,可作为研究水声信道的有力工具.
英文摘要:
      The feasibility of applying the projection onto convex sets to identifying the underwater acoustic channel is discussed.Then several useful constraints as convex sets are given in complex field.And the corresponding projection operators are obtained.Simulation and experimental results show that,when signal to noise ratio is high enough,the amplitude attenuation and phase change of the underwater acoustic channel can be estimated by using this method.The resolution is clearly higher than the match filter which is the classical maximum likelihood estimator.This method can be used for studying the property of the underwater acoustic channel.
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