Instantaneous Frequency Estimation of Multi-component Chirp Signals Based on Frft

DOI

10.2991/iccasm.2012.226How to use a DOI?

Keywords

Instantaneous frequency estimation,Multicomponent chirp signals, Fractional Fourier transform (FrFT),Wigner-ville distribution

Abstract

For the problem 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-pass filter, and then it picks up each component. Finally the instantaneous frequency of each single-component chirp signal is estimated if each signal's wigner-ville distribution is found. The simulation results verify the availability of the proposed method.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lili Zhang
AU  - Sixin Liu
AU  - Junjun Wu
PY  - 2012/08
DA  - 2012/08
TI  - Instantaneous Frequency Estimation of Multi-component Chirp Signals Based on Frft
BT  - Proceedings of the 2012 International Conference on Computer Application and System Modeling (ICCASM 2012)
PB  - Atlantis Press
SP  - 886
EP  - 889
SN  - 1951-6851
UR  - https://doi.org/10.2991/iccasm.2012.226
DO  - 10.2991/iccasm.2012.226
ID  - Zhang2012/08
ER  -