Open AccessResearch of Adaptive Frequency Search Based on Dichotomy
Author(s) -
Weiwei Mao,
Zhu Ru,
Xiaoyu Jin,
Zonghao Li,
Zhiguo Zhang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2025/1/012099
Subject(s) - signal (programming language) , filter (signal processing) , adaptive filter , narrowband , computer science , algorithm , kernel adaptive filter , discrete frequency domain , mathematics , filter design , frequency domain , telecommunications , computer vision , programming language
In order to solve the problem of finding out the frequency of signal through adaptive filter as soon as possible, the adaptive frequency search of adaptive filter has been focused in this paper. According to the change of the signal frequency, the proposed adaptive filter based on the technology of dichotomy decides the frequency of the input signal, realizes the narrowband filtering and the large dynamic variation of specific frequency signal. And the single frequency sinusoidal signal has been theoretically analyzed by the way of DTFT and discrete Fourier transform. Finally, the estimated value of the signal frequency has been preliminary measured by the method of DFT, then based on the characteristic of DFT, the dichotomy search for the real signal frequency has been designed so that the accuracy of frequency measurement would be guaranteed within 2Hz.