Title:
REFINED FOURIER TRANSFORM-BASED SIGNAL ANALYSIS METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/024320
Kind Code:
A1
Abstract:
A refined Fourier transform-based signal analysis method, belonging to the field of signal processing. Said method convolutes a signal x(n) to be analyzed and e-2
πj
αmn/N, so as to obtain a refined Fourier transform form of x(n), N representing the length of the signal x(n), j being an imaginary unit, π being the circular constant, m having a value range of m = 0,1,2,…,(N/α), α∈(0,1], and (N/α) representing the rounded value of N/α. Said method solves the problems that the discrete Fourier Transform (DFT) method has a low frequency precision and a low amplitude precision and is unsuitable for joint time-frequency analysis, etc.; compared to numerous amplitude spectrum or power spectrum correction methods, said method has the advantage of accurately extracting all frequency components from a signal having an intensive spectrum; in addition, said method is a complete Fourier transform method, having an inverse transform method and satisfying the Parseval energy conservation law.
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Inventors:
XUAN JIANPING (CN)
LI RUI (CN)
LI RUI (CN)
Application Number:
PCT/CN2018/099521
Publication Date:
February 06, 2020
Filing Date:
August 09, 2018
Export Citation:
Assignee:
UNIV HUAZHONG SCIENCE TECH (CN)
International Classes:
G01R23/16
Foreign References:
| CN104062498A | 2014-09-24 | |||
| CN108038580A | 2018-05-15 | |||
| CN103777199A | 2014-05-07 | |||
| CN107817402A | 2018-03-20 |
Attorney, Agent or Firm:
HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY PATENT AGENCY CENTER (CN)
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