文章摘要
王彦,马章勇,黄建人.一种采用两个相干累加器提高自适应谱线增强器性能的方法[J].声学技术,2003,(1):8~10
一种采用两个相干累加器提高自适应谱线增强器性能的方法
A method for improving the performance of ALE using two coherent accumulators
投稿时间:2001-05-30  修订日期:2001-08-20
DOI:
中文关键词: 自适应谱线增强  相干累加  噪声抑制
英文关键词: adaptive spectral- line enhancer  coherentaccumulate  noise suppression
基金项目:
作者单位
王彦 东南大学无线电工程系, 南京, 210018 
马章勇 东南大学无线电工程系, 南京, 210018 
黄建人 东南大学无线电工程系, 南京, 210018 
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中文摘要:
      水声信道通常是一种时变的强噪声信道,频带狭窄且各种信号的频谱相互重叠,采用传统的滤波器或自适应谱线增强器(ALE)检测CW信号的效果不佳。本文提出了一种采用两个相干累加器进行IIR跟踪滤波的ALE,具有较好的窄带滤波性能,提高了在低信噪比的水声环境下对CW信号的检测能力;该算法还具有运算简单、易于用硬件实现的优点。文中给出了计算机模拟结果。
英文摘要:
      Under water acoustic channels are usually time-varying with strong noise,in which various signals with narrow bandwidth are superimposed.Using conventional filters or adaptive spectral-line enhancers to detect CW signals is not ideal in these channels.In this paper,a method based on ALE using two coherent accumulators is introduced,which attempts to adjust the IIR filter to treat CW signals.Its performance in low SNR channels is satisfactory.In addition,implementation of the technique is simple.Computer simulation results are also presented.
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