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Ham-noise, howling, MRI noise, etc., are narrow band noises.
An adaptive notch filter can suppress a narrow band noise whose frequency is unknown. |  |
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Since the adaptive notch filter automaticaly removes the narrow band noise,
the tracking speed is the most important factor.
We have proposed a parallel adaptive notch filter which achieves high convergence speed and high estimation accuracy, simultaneously. |  |
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We used a sinusoid mixed with a white noise as an observed signal,
where the sinusoid is unwanted signal.
From results, we see that the parallel notch filter attains high convergence speed. |  Experimental Result |