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| 论文题目 |
自适应Notch滤波器的FPGA实现 |
| 论文题目（英文） |
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| 作者 |
严鹏 |
| 发表年度 |
2008 |
| 卷 |
27 |
| 期 |
2 |
| 页码 |
275-278 |
| 期刊名称 |
声学技术 |
| 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。
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 |
| 摘要_英文 |
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.
Key words : adaptive filter; notch filter; LMS( Least Mean Square) ; DDS(Direct Digital frequency Synthesizer) ; FPGA( Field Programmable Gate Array) |
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