Title :
A New Time-Frequency Analysis Method of Multi-Component Chirp Signal
Author :
Cao, Fan ; Wang, Shuxun ; Wang, Fei
Author_Institution :
Inst. of Commun. Eng., Jilin Univ., Changchun
Abstract :
In this paper, a new time-frequency analysis method for multi-component chirp signals is presented. First we define the fourth-order fractional Fourier transform (FRFT) center moment spectrum and then we can get the number of signals and estimate the frequency modulation ratio of each component by analyzing the fourth-order FRFT center moment spectrum. Secondly, we present the signal-adaptive PWD (SA-PWD). Compared with other methods based on time-frequency analysis, this method can remove most of the cross-terms while keeping high time-frequency resolution. Finally, the computer simulation results demonstrate the effectiveness of this approach
Keywords :
Fourier transforms; chirp modulation; frequency estimation; signal resolution; time-frequency analysis; center moment spectrum; computer simulation; fourth-order fractional Fourier transform; frequency modulation estimation; multicomponent chirp signal; time-frequency analysis method; time-frequency resolution; Chirp; Equations; Fourier transforms; Frequency modulation; Kernel; Samarium; Signal analysis; Signal processing; Space technology; Time frequency analysis;
Conference_Titel :
Signal Processing, 2006 8th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9736-3
Electronic_ISBN :
0-7803-9736-3
DOI :
10.1109/ICOSP.2006.344487
