Instantaneous Frequency Estimation of Multi-component Chirp Signals Based on Frft
For the prablem of the instantaneous frequency estimation of multi-component chirp signals,a new method is presented.And the fractional Fourier transform (FrFT)method is applied to estimate instantaneous frequency of multi-component chirp signals.The chirp signal has the feature that different chirp signal can get the best energy concentration in its different fractional Fourier transform domain,so the multi-component chirp signals is firstly transformed through FrFT,and then we find the corresponding order p of the every energy concentration and make the p order FrFT through a band-lass filter,and then it picks up each component.Finally the instantaneous frequency of each single-component chirp signal is estimated if each signals wigner-ville distribution is found.The simulation results verify the availability of the proposed method.
Instantaneous frequency estimation Multi-component chirp signals Fractional Fourier transform(FrFT) Wigner-ville distribution
Lili Zhang Sixin Liu Junjun Wu
College of Electronic Information Engineering Shenyang Aerospace University Shengyang, China College of GeoExploration Science and Technology Jilin University Changchun,China
国际会议
沈阳
英文
886-889
2012-07-27（万方平台首次上网日期，不代表论文的发表时间）