文章摘要
彭会斌.一种新型的滤波器组在水声应答器中的应用[J].声学技术,2012,(3):326~330
一种新型的滤波器组在水声应答器中的应用
Application of a new type of filter group in underwater acoustic transponder
投稿时间:2012-01-02  修订日期:2012-05-11
DOI:
中文关键词: 滤波器组|水声应答器|信道化|加窗
英文关键词: filter banks  underwater acoustic transponder  channelization  weighting
基金项目:
作者单位E-mail
彭会斌 海军驻上海水声导航军代室, 上海201108 bernou@163.com 
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中文摘要:
      针对某型水声应答器中处理信号频带变宽,信号中叠加了多个频率分量以及实时性要求高的问题,提出一种基于频域信道化技术的滤波器组方法.首先给出该滤波器组的理论推导,并对滤波器组进行加窗处理,给出了FFT的长度和移动重叠点数等参数对该滤波器组的影响,最后进行了数值仿真,并进行了湖试试验数据处理.结果证明该方法可有效解决信号的信道串漏问题,验证了该滤波器组的正确性和可行性.该方法通过对信号信道化处理,减小了滤波处理的运算量,提高了数据的信噪比,便于后续的目标检测.该滤波器组算法简单、易实现、运算量小,在水声应答器信号处理中有一定的工程借鉴价值.
英文摘要:
      In order to solve the problem that the bandwidth of receiving signal is widened and superimposed by more frequency components and to satisfy the higher real-time requirement for a certain type of underwater acoustic trans-ponder,a filter group method based on channelized technique is proposed.This paper introduces the theoretical deri-vation process of the filter group,and then gives the proof of this method in solving the problem of data channel leakage through analyzing the filter group with weighting treatment.Next,the influences of the length of FFT and moving overlap points on the filter group are presented.Finally,the results of numerical simulation and lake trial data show that the proposed algorithm is effective and feasible.The method can weaken the requirement of the subsequent processing speed,and increase the data signal to noise ratio,which contributes to subsequent signal detection.This algorithm is easy to realize with small amount of computation.
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