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INSTANTANEOUS FREQUENCY ESTIMATION FOR MULTICOMPONENT SIGNALS USING A LEAST SQUARES EVOLUTIONARY SPECTRUM

Journal Name:

  • Istanbul University Journal of Electrical & Electronics Engineering

Publication Year:

  • 2006

Key Words:

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
We present a method for estimating the instantaneous frequency of the multi-component signals. This method involves the calculation of a time-frequency energy density of the signal, then obtaining an instantaneous frequency estimation from this joint density. Time-frequency energy density is calculated as a least squares optimal combination of multi-window Gabor based evolutionary spectra. The optimal weights are obtained by minimizing an error criterion that is the difference between a reference time-frequency distribution and the combination of evolutionary spectra. Instantaneous frequency of the signal is estimated from the final evolutionary spectrum as time conditional average frequency at local time-frequency regions. Examples are given to illustrate the performance of our method.
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FULL TEXT (PDF): 
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  • 2
237-243
  • English

REFERENCES

References: 

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