基于FPGA和MCU的低成本地震信号数字滤波器设计
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摘要
针对地震数据采集系统提出一种低成本、高灵活性的数字滤波设计方案。不仅对于地震数据采集系统有很大的实用意义,对于其它传感器网络也是可供参考的解决方案。设计的目的是在保持优秀的低通性能的同时实现高度抽取。该滤波器系统由四级CIC滤波和两级FIR滤波构成,分别在FP-GA和MCU内部实现。滤波器有着良好的低通性能,在430 Hz～500 Hz范围内幅度响应下降了137 dB。采用实际信号测试,信噪比好于110 dB,能够很好地满足地震数据采集的需求。
A low cost and flexible digital filter solution for seismic data acquisition is put forward to improve performance of seismic data acquisition equipment.The purpose is to keep low frequency signal and realize high rate decimation at the same time.The digital filter system consists of four CIC filters which are realized in FPGA and two FIR filters which are realized in MCU.The CIC filters primary purpose is to attenuate out-of-band noise components from the modulator.The FIR filters compensates for SINC filters droop and creates a low-pass corner to block aliased components of the input signal.The digital filter has a good low-pass bandwidth performance,the frequency amplitude response drop 137 dB from 430 Hz to 500 Hz.A test system is build up,and the result shows that the signal to noise ratio of this system is better than 110 dB,which meets the demand of seismic data acquisition system.
A low cost and flexible digital filter solution for seismic data acquisition is put forward to improve performance of seismic data acquisition equipment.The purpose is to keep low frequency signal and realize high rate decimation at the same time.The digital filter system consists of four CIC filters which are realized in FPGA and two FIR filters which are realized in MCU.The CIC filters primary purpose is to attenuate out-of-band noise components from the modulator.The FIR filters compensates for SINC filters droop and creates a low-pass corner to block aliased components of the input signal.The digital filter has a good low-pass bandwidth performance,the frequency amplitude response drop 137 dB from 430 Hz to 500 Hz.A test system is build up,and the result shows that the signal to noise ratio of this system is better than 110 dB,which meets the demand of seismic data acquisition system.
引文
[1]程佩青.数字信号处理教程[M].北京:清华大学出版社,1995:1-34.
[2]Sheikh Farhana,Ler Melinda,Zlatanovici,et al.Power-performance optimal DSP architectures and ASICimplementation//Asilomar Conference on Signals,Systems and Computers[C].Asilomar:ACSSC'06,2006:480-1485.
[3]Parker,David A.Journal of VLSI Signal ProcessingSystems for Signal,Image,and Video Technology[J].VLSI Signal Process,1997,17(1):75-92.
[4]Yi Bi-jin,Mu Qun-ying,Luo Fu-long.Applicationtechniques of current seismic exploration instruments[J].PROGRESS IN GEOPHYSICS,2004,19(4):837-846.
[5]杨森林,高静怀.一种地震子波峰值频率的估计方法[J].西安交通大学学报,2007,41(6):660-664.
[6]T.M.McGEE.The use of marine seismic profiling forenvironmental assessment[J].Geophysical Prospec-ting,1990,38(8):861-880.
[7]Cirrus Logic.Low-power,High-performanceΔ-ΣModulators[EB/OL].http://www.cirrus.com/en/pubs/proDatasheet/CS5371A-72A_F3.pdf,2010/2010.
[8]刘益成.信号处理与过抽样转换器[M].北京:电子工业出版社,1997.
[9]B.A.Shenoi.Introduction to Digital Signal Processingand Filter Design[M].New Jersey:John Wiley&Sons Inc,2006:303-343.
[10]Richard Lyons.Understanding cascaded integrator-comb filters[EB/OL].http://www.embedded.com/showArticle.jhtml?articleID=160400592,2005/2010.
[11]Xilinx.Spartan-3 Generation FPGA User Guide[EB/OL].http://www.xilinx.com/support/docu-mentation/data_sheets/ds312.pdf,2019/2010.
[12]RA Hawley.Design Techniques for Silicon CompilerImplementations of High-speed FIR Digital Filters[J].IEEE Journal of Solid-State Circuits,1996,31(5):656-667.
[13]NXP.LPC2104/2105/2106 datasheet[EB/OL].http://www.nxp.com/documents/data_sheet/LPC2104_2105_2106.pdf,2008/2010.
[2]Sheikh Farhana,Ler Melinda,Zlatanovici,et al.Power-performance optimal DSP architectures and ASICimplementation//Asilomar Conference on Signals,Systems and Computers[C].Asilomar:ACSSC'06,2006:480-1485.
[3]Parker,David A.Journal of VLSI Signal ProcessingSystems for Signal,Image,and Video Technology[J].VLSI Signal Process,1997,17(1):75-92.
[4]Yi Bi-jin,Mu Qun-ying,Luo Fu-long.Applicationtechniques of current seismic exploration instruments[J].PROGRESS IN GEOPHYSICS,2004,19(4):837-846.
[5]杨森林,高静怀.一种地震子波峰值频率的估计方法[J].西安交通大学学报,2007,41(6):660-664.
[6]T.M.McGEE.The use of marine seismic profiling forenvironmental assessment[J].Geophysical Prospec-ting,1990,38(8):861-880.
[7]Cirrus Logic.Low-power,High-performanceΔ-ΣModulators[EB/OL].http://www.cirrus.com/en/pubs/proDatasheet/CS5371A-72A_F3.pdf,2010/2010.
[8]刘益成.信号处理与过抽样转换器[M].北京:电子工业出版社,1997.
[9]B.A.Shenoi.Introduction to Digital Signal Processingand Filter Design[M].New Jersey:John Wiley&Sons Inc,2006:303-343.
[10]Richard Lyons.Understanding cascaded integrator-comb filters[EB/OL].http://www.embedded.com/showArticle.jhtml?articleID=160400592,2005/2010.
[11]Xilinx.Spartan-3 Generation FPGA User Guide[EB/OL].http://www.xilinx.com/support/docu-mentation/data_sheets/ds312.pdf,2019/2010.
[12]RA Hawley.Design Techniques for Silicon CompilerImplementations of High-speed FIR Digital Filters[J].IEEE Journal of Solid-State Circuits,1996,31(5):656-667.
[13]NXP.LPC2104/2105/2106 datasheet[EB/OL].http://www.nxp.com/documents/data_sheet/LPC2104_2105_2106.pdf,2008/2010.
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