文章摘要
严鹏,杨振,许伟杰.自适应Notch滤波器的FPGA实现[J].声学技术,2008,(2):275~278
自适应Notch滤波器的FPGA实现
Implementation of FPGA-based adaptive notch filter
投稿时间:2007-10-12  修订日期:2008-01-11
DOI:
中文关键词: 自适应滤波  Notch滤波器  最小均方误差  直接数字频率合成器  现场可编程门阵列
英文关键词: adaptive filter  notch filter  LMS(Least Mean Square)  DDS(Direct Digital frequency Synthesizer)  FPGA(Field Programmable Gate Array)
基金项目:
作者单位
严鹏 中国科学院声学研究所东海研究站, 上海, 200032 
杨振 解放军某部, 湛江, 524022 
许伟杰 中国科学院声学研究所东海研究站, 上海, 200032 
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中文摘要:
      针对水下目标跟踪定位系统中信号的特点,采用自适应Notch滤波器对接收信号进行检测,使系统在低信噪比的情况下仍能保证较高的正确检测率。提出了用FPGA实现Notch滤波器的硬件电路方案,用DDS技术解决了Notch滤波器的正交参考源的输入问题,简化了系统的设计,提高了稳定性,同时保持了较高的检测正确率。
英文摘要:
      According to the signal characteristics of underwater target tracking and positioning system,the Adaptive Notch Filter which is used to detect receiving signal,can guarantee high correct rate of detection in low SNR.Using FPGA instead of DSP to implement hardware Notch filter is proposed,and DDS technology is used to solve the problem of the orthogonal reference source input for the Notch Filter.This method can not only simplify the system design and improve the stability,but also maintain high correct rate of detection.
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