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New time-"frequency rate" distribution for polynomial phase signal

本站小编 哈尔滨工业大学/2019-10-24

New time-"frequency rate" distribution for polynomial phase signal

ZHANG Yun1, JIANG Yi-cheng1, WANG Yong1, LIU Rui-hua2

1.Institute of Electronic Engineering Technology,Harbin Institute of Technology,Harbin 150001,China;2.College of Electronic Information Engineering,Civil Aviation University of China,Tianjin 300300,China



Abstract:

Time-"frequency rate" distribution(TFRD)is an extension of the traditional time-frequency distribution(TFD),and it exploits the relationship between time and frequency rate,or the second order phase derivative of signal.A new TFRD highly concentrated along the frequency rate of polynomial phase signal(PPS)is presented,which provides a new way to PPS.It has been defined by introducing signal with a complex argument in the time-"frequency rate" analysis,and the inner interferences caused by the nonlinearity of the signal’s phase can be reduced greatly with high time-frequency concentration.Implementation of the TFRD is discussed and the results are demonstrated by the application for accelerated target imaging of synthetic aperture radar(SAR).

Key words:  TFRD  PPS  Complex argument  synthetic aperture radar

DOI:10.11916/j.issn.1005-9113.2010.06.026

Clc Number:TN957.51

Fund:


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