一种用于MEMS数字检波器的SINC抽取滤波器优化设计与FPGA高效实现
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摘要
MEMS数字检波器是全数字地震数据采集系统的核心组成之一,其优异的微弱信号检测能力是高品质地震数据采集的基础.本文针对我国自主研发MEMS数字检波器,给出了一种用于数字信号处理的高精度抽取滤波器设计与FPGA器件高效实现结构.抽取滤波器主要由高效抗混叠SINC滤波器、补偿衰减并进一步抽取的补偿滤波器和完成系统精细滤波的等波纹FIR滤波器三部分组成.文章根据MEMS检波器的要求,主要对SINC抽取滤波器进行了仿真设计,并优化设计了其硬件电路,最后对其进行了高效的FPGA实现.结果表明该设计方案不但能够满足MEMS数字检波器对滤波器提出的各项性能指标,并且降低了系统功耗,为未来的多通道、大阵列地震勘探系统打下基础.
MEMS acceleration sensor is one of the essential parts of the seismic exploration equipment,which is the basis of high-quality seismic data acquisition for its excellent performance on detecting weak signals.The purpose of this paper is to study the decimation filtering section of the MEMS acceleration sensor and design an efficient decimation filter with high precision.The filter system consists of front-end antialiasing SINC filters,a compensation filter and an equal-ripple FIR filter.The coefficients of the SINC filter are analyzed and its hardware structure is optimized for FPGA in this paper.The proposed design is simulated on MATLAB and implemented on FPGA.The results show that the design can meet the requirements of the seismic exploration equipment with less power consumption,which is of great significance for the future seismic exploration system with multi-channel and large arrays.
MEMS acceleration sensor is one of the essential parts of the seismic exploration equipment,which is the basis of high-quality seismic data acquisition for its excellent performance on detecting weak signals.The purpose of this paper is to study the decimation filtering section of the MEMS acceleration sensor and design an efficient decimation filter with high precision.The filter system consists of front-end antialiasing SINC filters,a compensation filter and an equal-ripple FIR filter.The coefficients of the SINC filter are analyzed and its hardware structure is optimized for FPGA in this paper.The proposed design is simulated on MATLAB and implemented on FPGA.The results show that the design can meet the requirements of the seismic exploration equipment with less power consumption,which is of great significance for the future seismic exploration system with multi-channel and large arrays.
引文
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You Q Y.2003.MICRO Power broad digital seismograph[J].Chinese Journal of Geophysics(in Chinese),46(3):347-351.
底青云,方广有,张一鸣.2013.地面电磁探测系统(SEP)研究[J].地球物理学报,56(11):3629-3639.
郝天珧,游庆瑜.2011.国产海底地震仪研制现状及其在海底结构探测中的应用[J].地球物理学报,54(12):3352-3361.
孔阳.2011.一种适用于地震勘探仪器的低运算量数字滤波器的设计与研究[博士论文].合肥:中国科学技术大学.
刘光鼎.2013.发展地球立体探测技术,提高地学仪器装备水平[J].地球物理学报,56(11):3607-3609.
游庆瑜.2003.MC1微功耗宽频带数字地震仪[J].地球物理学报,46(3):347-351.
Al-Haj A.2005.A parallel FPGA implementation of the discretewavelet transform based on polyphase decomposition anddistributed arithmetic techniques[J].Dirasat Online:PureSciences,32(1):7-18.
Beeby S P,Ensel G,Kraft M.2004.MEMS Mechanical Sensors[M].Boston:Artech House.
de la Rosa J M.2011.Sigma-delta modulators:Tutorial overview,design guide,and state-of-the-art survey[J].IEEETransactions on Circuits and Systems I:Regular Papers,58(1):1-21.
Di Q Y,Fang G Y,Zhang Y M.2013.Research of the surfaceelectromagnetic prospecting(SEP)system[J].Chinese JournalGeophysics(in Chinese),56(11):3629-3639.
Dong Y,Zwahlen P,Nguyen A M,et al.2011.Ultra-highprecision MEMS accelerometer[C].//2011 16th InternationalSolid-State Sensors,Actuators and Microsystems Conference(TRANSDUCERS).Beijing:IEEE,695-698.
Hao T Y,You Q Y.2011.Progress of homemade OBS and itsapplication on ocean bottom structure survey[J].ChineseJournal Geophysics(in Chinese),54(12):3352-3361.
Hogenauer E.1981.An economical class of digital filters fordecimation and interpolation[J].IEEE Transactions onAcoustics,Speech and Signal Processing,29(2):155-162.
http://www.cirrus.com/en/pubs/proDatasheet/CS5376A_F4.pdf.
Ignjatovic Z,Maricic D,Bocko M F.2012.Low power,highdynamic range cmos image sensor employing pixel-leveloversamplingΣΔanalog-to-digital conversion[J].SensorsJournal,IEEE,12(4):737-746.
Khoshnoud F,de Silva C W.2012.Recent advances in MEMSsensor technology-biomedical applications[J].Instrumentation&Measurement Magazine,IEEE,15(1):8-14.
Kutz H,Mar M,Rohilla G,et al.2011.Programmable sigma-deltaanalog-to-digital converter:U.S.Patent 8,040,266[P].2011-10-18.
Latha R,Kumar D K.2012.Power efficient polyphase comb filterfor digital receivers[J].Bonfring International Journal ofResearch in Communication Engineering,2(Special Issue onCommunication Technology Interventions for Rural and SocialDevelopment):58-62.
Liang W Q,Yang C C,Qiao D H.2012.On the design of feedforwardΣΔinterface for MEMS based accelerometers[J].Analog Integr.Circ.Sig.Process.,72(1):3-10.
Liu G D.2013.Developing earth exploration technology in threedimension,improving the performance of instruments forgeosciences[J].Chinese Journal of Geophysics(in Chinese),56(11):3607-3609.
Naqvi S R,Deligoz I,Kiaei S,et al.2011.Dynamic calibration offeedback DAC non-linearity for a 4th order CT sigma delta fordigital hearing aids[C]//2011 IEEE International SOCConference(SOCC).Taipei:IEEE,109-113.
Panas R M,Cullinan M A,Culpepper M L.2012.Design ofpiezoresistive-based MEMS sensor systems for precisionmicrosystems[J].Precision Engineering,36(1):44-54.
You Q Y.2003.MICRO Power broad digital seismograph[J].Chinese Journal of Geophysics(in Chinese),46(3):347-351.
底青云,方广有,张一鸣.2013.地面电磁探测系统(SEP)研究[J].地球物理学报,56(11):3629-3639.
郝天珧,游庆瑜.2011.国产海底地震仪研制现状及其在海底结构探测中的应用[J].地球物理学报,54(12):3352-3361.
孔阳.2011.一种适用于地震勘探仪器的低运算量数字滤波器的设计与研究[博士论文].合肥:中国科学技术大学.
刘光鼎.2013.发展地球立体探测技术,提高地学仪器装备水平[J].地球物理学报,56(11):3607-3609.
游庆瑜.2003.MC1微功耗宽频带数字地震仪[J].地球物理学报,46(3):347-351.
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