Frequency Estimation using Adaptive Delay Notch Filter based on Sign Algorithm

Abstract

In this paper, we present a new frequency estimation algorithm using an adaptive delay notch filter (ADNF) based on a sign algorithm for a single sinusoid. The feature of the proposed method using the ADFN which can control the number of delay elements is to adapt the time t in signal x(t). That is, the control of the number of delay elements of the ADNF is equivalent to controlling time t in signal x(t) indirectly. Combining the ADNF and the sign algorithm, the proposed method is constructed without the multiplier. By the computer simulations, we show that the frequency estimation based on the controlling the number of delay elements corresponding to time t in signal x(t) can be constructed. Then we compare the proposed method with the adaptive line enhancer in respect to the frequency estimation accuracy and the computational complexity.