一种分析和设计抗混叠滤波器的方法
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摘要
信号采集通道中,一般采用高阶抗混叠滤波器来消除频率混叠现象,这同时也增加了滤波器设计难度。为有效降低滤波器设计的难度,在详细分析并讨论了抗混叠滤波器的陡度、阶数与信号抽样频率以及A/D转换器的分辨率之间的内在关系后,提出了抗混叠滤波器、抽样频率和A/D转换器三者之间合理权衡设计的方法。该分析方法为抗混叠滤波器乃至信号采集通道的设计提供了十分有益的参考。
The high-rank anti-aliasing filter is often used to avoid spectrum aliasing in signal gathering system.In an effort to reduce the difficulty of designing filters,the relations among the anti-aliasing filter′s roll-off rate,rank,sampling frequency and the recognition of analog-to-digital converter are discussed and analysed in detail,then a reasonable method to choose and design these three ones are presented including anti-aliasing filter,sampling frequency and A/D converter.The results provide an effective reference for design of anti-aliasing filter and signal gathering channel.
The high-rank anti-aliasing filter is often used to avoid spectrum aliasing in signal gathering system.In an effort to reduce the difficulty of designing filters,the relations among the anti-aliasing filter′s roll-off rate,rank,sampling frequency and the recognition of analog-to-digital converter are discussed and analysed in detail,then a reasonable method to choose and design these three ones are presented including anti-aliasing filter,sampling frequency and A/D converter.The results provide an effective reference for design of anti-aliasing filter and signal gathering channel.
引文
[1]黄振平.采用频率的合理选择[J].世界地震工程,1998,14(3):63-67.
[2]李德葆.振动模态分析及其应用[M].北京:宇航出版社,1989.
[3]谭清,龙杰强.便携式数据采集系统中自适应抗混叠滤波器的设计[J].现代电子技术,2007,30(5):105-107.
[4]李刚.高精度数据采集中抗混叠滤波器的设计[J].国外电子元器件,2007(8):31-34.
[5]齐永前,孙俊杰.振动信号的抗混叠跟踪滤波的实现[J].现代制造工程,2006(2):93-95.
[6]刘洪涛,吴云洁.高品质抗混叠滤波器的设计[J].仪器仪表用户,2006,13(1):97-98.
[7]赵传伟.数据采集的基本原理[J].大众科学,2007(16):57-58.
[2]李德葆.振动模态分析及其应用[M].北京:宇航出版社,1989.
[3]谭清,龙杰强.便携式数据采集系统中自适应抗混叠滤波器的设计[J].现代电子技术,2007,30(5):105-107.
[4]李刚.高精度数据采集中抗混叠滤波器的设计[J].国外电子元器件,2007(8):31-34.
[5]齐永前,孙俊杰.振动信号的抗混叠跟踪滤波的实现[J].现代制造工程,2006(2):93-95.
[6]刘洪涛,吴云洁.高品质抗混叠滤波器的设计[J].仪器仪表用户,2006,13(1):97-98.
[7]赵传伟.数据采集的基本原理[J].大众科学,2007(16):57-58.
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