| 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 |
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| 引用本文： | 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,2003,22(1):8-10. |
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| 作者姓名： | 王彦 马章勇 黄建人 |
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| 作者单位： | 东南大学无线电工程系,南京,210018 |
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| 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。
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| 关 键 词： | 自适应谱线增强 相干累加 噪声抑制 |
| 文章编号： | 1000-3630(2003)01-0008-03 |
| 收稿时间： | 2001/5/30 0:00:00 |
| 修稿时间： | 2001/8/20 0:00:00 |
A method for improving the performance of ALE using two coherent accumulators |
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| WANG Yan,MA Zhang-yong and HUANG Jian-ren.A method for improving the performance of ALE using two coherent accumulators[J].Technical Acoustics,2003,22(1):8-10. |
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| Authors: | WANG Yan MA Zhang-yong and HUANG Jian-ren |
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| Affiliation: | Department of Radio Engineering, Southeast University, Nanjing 210018, China;Department of Radio Engineering, Southeast University, Nanjing 210018, China;Department of Radio Engineering, Southeast University, Nanjing 210018, China |
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| Abstract: | Underwateracousticchannelsareusuallytime varyingwithstrongnoise ,inwhichvarioussignalswithnarrowbandwidth aresuperimposed .Usingconventionalfiltersoradaptivespectral lineenhancerstodetectCWsignalsisnotidealinthesechannels .Inthispaper,amethodbasedonALEusingtwocoherentaccumulatorsisintroduced ,whichattemptstoadjusttheIIRfiltertotreat CWsignals.ItsperformanceinlowSNRchannelsissatisfactory .Inaddition ,implementationofthetechniqueissimple .Computersimulationresultsarealsopresented . |
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| Keywords: | adaptive spectral- line enhancer coherentaccumulate noise suppression |
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