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Detection of Frequency Modulated Signals Using a Robust IF Estimation Algorithm

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Abstract

This paper presents a methodology to detect non-stationary frequency modulated signals under noise process uncertainty. The proposed method uses the combination of adaptive directional time–frequency distribution and modified Viterbi algorithm to robustly estimate the instantaneous frequency (IF) of the given signal. This IF information is then used to remove the frequency modulation from the given signal thus converting it into temporally correlated signal. This temporal correlation is then exploited to detect signals under noise power uncertainty. The effectiveness of the proposed detector is shown through numerical simulations.

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Authors and Affiliations

  1. Electrical Engineering, Foundation University, Islamabad, Pakistan

    Nabeel Ali Khan

  2. University of Human Development, Kirkuk, Iraq

    Mokhtar Mohammadi

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  1. Nabeel Ali Khan
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  2. Mokhtar Mohammadi
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Correspondence to Nabeel Ali Khan.

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Khan, N.A., Mohammadi, M. Detection of Frequency Modulated Signals Using a Robust IF Estimation Algorithm. Circuits Syst Signal Process 39, 2223–2231 (2020). https://doi.org/10.1007/s00034-019-01258-z

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  • DOI: https://doi.org/10.1007/s00034-019-01258-z

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