The Teager-Kaiser energy operator in presence of multiple narrowband interference

Authors:
Hanns-Ulrich Dehner;Holger Jäkel;Dennis Burgkhardt;Friedrich K. Jondral
Affiliations:
Karlsruhe Institute of Technology, Communications Engineering Lab, Karlsruhe, Germany;Karlsruhe Institute of Technology, Communications Engineering Lab, Karlsruhe, Germany;Karlsruhe Institute of Technology, Communications Engineering Lab, Karlsruhe, Germany;Karlsruhe Institute of Technology, Communications Engineering Lab, Karlsruhe, Germany
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

As the analog front-end of an energy detector is highly susceptible to narrowband interference a modified energy detection scheme based on the Teager-Kaiser operator and high-pass filtering is considered. This letter analyzes the Teager-Kaiser operator output for an arbitrary number of narrowband band-pass signals having different amplitudes, center frequencies and bandwidths. The analysis reveals that additional cross components occur at the operator's output in case of multiple narrowband interference. Hence, a simple narrowband interference suppression with Teager-Kaiser operator and high-pass filtering can be insufficient.