Low complexity demodulator for BFSK waveforms based on polygonal approximation


  • Jorge Torres-Gómez Higher Polytechnic Institute José Antonio Echeverría
  • Fidel Ernesto Hernández-Montero University of Mondragon
  • Joachim Habermann University of Applied Science Technische Hochschule Mittelhessen




BFSK, digital demodulation, polygonal approximation


The  present  article  relates  in  general  to  digital  demodulation  of  Binary  Frequency  Shift  Keying  (BFSK  waveform).  The  objective  of  the  present  research is to obtain a new processing method for demodulating BFSK-signals in order to reduce hardware complexity in comparison with other reported. The solution proposed here makes use of the theories of matched filters and curve segmentation. The article describes the integration and configuration of a Sampler Correlator and polygonal segmentation blocks in order to obtain a digital receiver for properly demodulating the signal received. The proposed solution  is  shown  to  reduce  dramatically  the  complexity  in  hardware  and  has a better performance regarding noise in comparison with other reported. Theoretical  details  concerning  limits  of  applicability  are  also  given  by  closed-form  expressions.  Simulation  experiments  are  illustrated  to  validate  the overall performance.

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Author Biographies

Jorge Torres-Gómez, Higher Polytechnic Institute José Antonio Echeverría

Department of Telecommunications and Telematics.

Fidel Ernesto Hernández-Montero, University of Mondragon

Signal Theory and Communications Research Group.

Joachim Habermann, University of Applied Science Technische Hochschule Mittelhessen

Department of Electrical Engineering and Information Technology, professor.


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How to Cite

Torres-Gómez, J., Hernández-Montero, F. E., & Habermann, J. (2015). Low complexity demodulator for BFSK waveforms based on polygonal approximation. Revista Facultad De Ingeniería Universidad De Antioquia, (74), 50–59. https://doi.org/10.17533/udea.redin.19422

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