A Review of Transient Suppression Methods of IIR Notch Filters Used for Power-Line Interference Rejection in ECG Measurement

  • Shadi MahdianiEmail author
  • Vala Jeyhani
  • Antti Vehkaoja
Conference paper
Part of the IFMBE Proceedings book series (IFMBE, volume 57)


Bioelectric signals are often corrupted by noise. The most common form of noise is power-line interference and its harmonics. A convenient way for eliminating these unwanted components is to use a single or multiple notch filters. One of the problems about this approach is the effect of transient response of the filter at the beginning of its output in short time measurements. In this work, three initialization methods, which can be used to reduce/overcome this problem are reviewed and their performance and computational complexity are evaluated using ECG as an example signal. These methods are projection initialization, pole radius-varying filtering and vector projection. Additionally, some implementation variations and memory usage considerations are discussed. Our study shows that, pole radius-varying method is computationally cheap but introduces longer transient than the others. On the other hand, vector projection provides a more accurate reconstruction of the signal in the transient part of the output but with a more expensive computation. There are also two drawbacks about vector projection. One is its computational complexity dependency to the sampling frequency of the signal and the other is the fact that it cannot provide the results in real-time.


ECG Initialization Filter IIR Transient 


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  1. 1.
    Rangayyan R M, Reddy N P. Biomedical signal analysis: a case-study approach. New York, NY: Wiley-Interscience 2002.Google Scholar
  2. 2.
    Huhta James C, Webster J G. 60-Hz Interference in Electrocardiography Biomedical Engineering, IEEE Transactions. 1973;BME-20:91–101.Google Scholar
  3. 3.
    Pei S C, Tseng C C. IIR multiple notch filter design based on allpass filter Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions. 1997;44:133–136.Google Scholar
  4. 4.
    Hendrikx T, Rosenqvist M, Wester P, Sandström H, Hörnsten R. Intermittent short ECG recording is more effective than 24-hour Holter ECG in detection of arrhythmias BMC cardiovascular disorders. 2014;14:41.CrossRefGoogle Scholar
  5. 5.
    Vehkaoja A, Lekkala J. Wireless measurement band for EEG mismatch negativity registration in mobile activities in Proceedings of XVIII IMEKO world congress: metrology for a sustainable development(Rio de Janeiro, Brazil) 2006.Google Scholar
  6. 6.
    Burlage D W. An initialization technique for improved MTI performance in phased array radars Proceedings of the IEEE. 1972;60:1551–1552.Google Scholar
  7. 7.
    Dewald K, Bersier A, Gardella P J, Jacoby D. IIR filter transient suppression by signal shifting in Biennial Congress of Argentina (ARGENCON), 2014 IEEE:153–158 2014.Google Scholar
  8. 8.
    Al-Ahmad H, Ahmed K. A novel technique for initializing digital IIR filters with a finite number of samples at a single frequency Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions. 1997;44:417–420.Google Scholar
  9. 9.
    Peterson R B, Atlas L E, Beach K W. A comparison of IIR initialization techniques for improved color Doppler wall filter performance in Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE;3:1705–1708 1994.Google Scholar
  10. 10.
    Al-Ahmad H, El-Khazali R. A new technique for initializing digital IIR filters at two frequencies in Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference;1:64–67 2003.Google Scholar
  11. 11.
    Jeedella J, Ahamad H Al, Al-Mualla M E. Optimum bandwidth IIR notch filters with multiple frequency initializations in Electronics, Circuits and Systems, 2005. ICECS 2005. 12th IEEE International Conference:1–4 2005.Google Scholar
  12. 12.
    Chornoboy E S. Initialization for improved IIR filter performance Signal Processing, IEEE Transactions. 1992;40:543–550.CrossRefGoogle Scholar
  13. 13.
    Pei S C, Tseng C C. Future of health insurance Elimination of AC interference in electrocardiogram using IIR notch filter with transient suppression. 1995;42:1128–1132.Google Scholar
  14. 14.
    Piskorowski J. Powerline interference removal from ECG signal using notch filter with non-zero initial conditions in Medical Measurements and Applications Proceedings (MeMeA), 2012 IEEE International Symposium:1-3 2012.Google Scholar
  15. 15.
    Piskorowski J. Powerline interference rejection from sEMG signal using notch filter with transient suppression in Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International:1447–1451 2012.Google Scholar
  16. 16.
    Piskorowski J. Digital Q -Varying Notch IIR Filter With Transient Suppression Instrumentation and Measurement, IEEE Transactions. 2010;59:866–872.Google Scholar
  17. 17.
    Moody G B, Mark R G. The impact of the MIT-BIH Arrhythmia Database Engineering in Medicine and Biology Magazine, IEEE. 2001;20:45–50.Google Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of Electronics and Communications EngineeringTampere University of TechnologyTampereFinland
  2. 2.Department of Automation Science and EngineeringTampere University of TechnologyTampereFinland

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