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This paper presents the corrected steady-state mean square error (MSE) of the unbiased plain gradient (UPG) algorithm for a second-order adaptive IIR notch filter (ANF) for sinusoidal signal frequency detection. The corrected MSE in white Gaussian noise of the estimated filter coefficient is derived in closed form. Computer simulations are conducted to corroborate the theoretical analysis and to demonstrate its comparative performance with the previous analysis.
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Faculty of Engineering and Technology
Mahanakorn University of Technology
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