DOI 10.17586/0021-3454-2015-58-8-587-592
UDC 681.5.015
IMPROVING ACCURACY OF FREQUENCY IDENTIFICATION BY USING A CASCADE OF ADAPTIVE FILTERS
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics; student
S. V. Aranovskiy
ITMO University, Saint Petersburg, 197101, Russia; Associate professor
A. A. Bobtsov
ITMO University, Saint Petersburg, 197101, Russian Federation; Head of the School of Computer Technologies and Control, Professor at the Faculty of Control Systems and Robotics, Head of the Adaptive and Nonlinear Control Systems Lab
A. A. Pyrkin
ITMO University, Saint Petersburg, 197101, Russian Federation; Full Professor, Dean
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Abstract. The problem of frequency identification for a biased sinusoidal signal is considered. The use of an adaptive cascade of band-pass filters together with application of an identification algorithm is proposed to improve accuracy of frequency identification. This method may lead to significant improvement in the identification performance, to attenuation of oscillations in the signal identification error, and to reduction in the error signal bias. Numerical simulations demonstrate the proposed scheme efficiency.
Keywords: frequency identification, frequency locked loop, cascade circuit
