New time-“frequency rate” distribution for polynomial phase signal  

作　　者：张云 姜义成 王勇 刘瑞华 

机构地区：[1]Institute of Electronic Engineering Technology,Harbin Institute of Technology [2]College of Electronic Information Engineering,Civil Aviation University of China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2010年第6期880-883,共4页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.60872100);the National High Technology Research and Development Program of China(Grant No.2006AA12Z313)

摘　　要：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).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 argu- ment 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）.

关 键 词：TFRD PPS Complex argument synthetic aperture radar 

分 类 号：TP957[自动化与计算机技术]