Advertisement

Signals in the Frequency Domain

  • Jason Ng
  • Jeffrey J. Goldberger
Chapter

Abstract

Interpreting signals in the time domain is intuitively grasped by most people as time plots are commonly encountered in everyday life. Time domain plots represent the variable of interest in the y-axis and time in the x-axis. Stock charts show the up and down trends of your investment’s value over time. Your electric company bill will show your power usage month-to-month over the course of the year. Signals in cardiology are also most commonly displayed in the time domain. ECG and blood pressure monitors, for example, continuously plot voltages or pressure vs. time.

Keywords

Power Spectrum Frequency Domain Fast Fourier Transform Sine Wave Frequency Resolution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Harris FJ. On the use of windows for harmonic analysis with the discrete Fourier transform. Proc IEEE. 1978;66(1):51–83.CrossRefGoogle Scholar
  2. 2.
    Ng J, Goldberger JJ. Understanding and interpreting dominant frequency analysis of AF electrograms. J Cardiovasc Electrophysiol. 2007;18:680–685.PubMedCrossRefGoogle Scholar
  3. 3.
    Oppenhein AV, Schafer RW. Discrete-Time Signal Processing. Englewood Cliffs, NJ: Prentice Hall; 1989.Google Scholar
  4. 4.
    Ziemer RE, Tranter WH, Fannin DR. Signals and Systems: Continuous and Discrete. New York, NY: Macmillan; 1993.Google Scholar

Copyright information

© Springer London 2010

Authors and Affiliations

  1. 1.Department of Medicine, Division of Cardiology, Feinberg School of MedicineNorthwestern UniversityChicagoUSA

Personalised recommendations