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Steady-state analysis of a complex adaptive notch filter using modified gradient algorithm
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DOI：10.1016/j.aeue.2014.05.017.png)
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Based on power spectral density (PSD) analytical technique, mean square error (MSE) (or variance) of the frequency estimate of a first-order complex adaptive IIR notch filter (ANF) using modified complex plain gradient (MCPG) algorithm is investigated in this paper. The steady-state expression for MSE is derived in closed form. A quantitative analysis for the estimation MSE has been carried out. It has been revealed that the MSE of frequency estimate is independent of an input frequency of a complex sinusoid. In addition, computer simulations are treated to corroborate the theoretical analysis and the relationships between MSE and system parameters are shown. (C) 2014 Elsevier GmbH. All rights reserved.
Keyword:
Complex notch filter
Gradient algorithm
Frequency estimation
Power spectral density
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