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Estimation of the amplitude quotient of signals with common frequency

In the two channel acquisition systems, it is often to estimate the parameters of two common frequency sinusoidal signals. To estimate parameters of the periodic signals it is most suitable to use a transformation of the signal in the frequency domain. In this paper we try to show the effectiveness of the systematic error reduction using weighted amplitude DFT coefficients of two sine signals with common frequency. In estimations the Rife-Vincent class I windows have been used.