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Multiple fully adaptive notch filter design based on allpass sections

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2 Author(s)
DeBrunner, V. ; Sch. of Electr. & Comput. Eng., Oklahoma Univ., Norman, OK, USA ; Torres, S.

We develop a canonical, adaptive cascade-structure IIR notch filter to detect and track multiple time-varying frequencies in additive white Gaussian noise. The algorithm uses allpass frequency transformation filters and a truncated gradient. Simulations indicate that our algorithm is computationally simple, converges rapidly, and has good frequency resolution

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Signal Processing, IEEE Transactions on  (Volume:48 ,  Issue: 2 )