Adaptive sinusoid detection using IIR notch filters and multirate techniques

A structure for the detection of sinusoids using adaptive infinite impulse response (IIR) notch filters and multirate techniques is presented. By using the frequency enhancement property of the decimation in time process the structure avoids the use of almost unity radius notch filters. Computer simulations are used to demonstrate the performance of this method for the detection of closely spaced sinusoids and tracking of nonstationary signals. The method seems to be particularly useful for real-time and low-cost applications.<
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