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- W3169761410 abstract "This paper proposes a novel multiple frequency rejection technique based on the STFT (Short-Time Fourier Transform) and APNF (All-Pass filter-based Notch Filter). Because a non-adaptive multiple notch filter cannot track the target frequencies, an adaptive filter is often used. However, the existing adaptive notch filters cannot accurately identify the number of frequencies, which may deteriorate the filtering performance. Furthermore, a time-frequency analysis can be performed to simultaneously estimate the number of target frequencies and track them. Therefore, a novel adaptive multiple notch filtering method is developed, adopting the STFT at the front end of APNF. In particular, an interpolation scheme is adopted to compensate for the low frequency resolution of STFT. This framework exhibits a smaller amplitude response distortion for the pass-band compared to that in cascade-type multiple notch filters and can thus reject the time-varying frequencies. A MATLAB simulation is performed to verify the performance of the proposed method. The results confirm that the proposed scheme outperforms the conventional adaptive notch filter in removing chirp signals and temporary signals." @default.
- W3169761410 created "2021-06-22" @default.
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- W3169761410 date "2021-06-30" @default.
- W3169761410 modified "2023-09-26" @default.
- W3169761410 title "Multiple Frequency Rejection using Short-time Fourier Transform and All-pass Filter-based Notch Filter" @default.
- W3169761410 doi "https://doi.org/10.5302/j.icros.2021.20.0197" @default.
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