Micro-Doppler feature plays an important role in cone-shaped target recognition and parameter estimation. However, translational motion causes shifting, tilting, and aliasing in micro-Doppler spectrum and influences the extraction of micro-Doppler features. Most existing methods do not consider higher order translation compensation. In this article, a high-order translational motion compensation method is proposed. First, the high-order ambiguity function (HAF) of a periodical polynomial phase signal exhibits periodicity along the lag axis and reaches the peak concentration when the lag is equal to the micromotion period. The micromotion period can be obtained by searching the peak concentration of echo's HAF. Then, the translational jerk and acceleration are, respectively, compensated by searching the peaks of the second- and third-order HAFs. Last, convolution is operated on the frequency spectrum to find the symmetric center located at the Doppler shift frequency, and the residual translational velocity can be estimated. Experimental results based on electromagnetic computation data show that the proposed method can accurately achieve high-order translational compensation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Ambiguity Function Based High-Order Translational Motion Compensation


    Contributors:
    Zhuo, Zhenyu (author) / Du, Lan (author) / Lu, Xiaofei (author) / Ren, Ke (author) / Li, Lu (author)


    Publication date :

    2023-04-01


    Size :

    4738693 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Fourth-Order Ambiguity Function Based on the Fractional Fourier Transform

    Shan, Tao / Tao, Ran / Sun, Rongrong | IEEE | 2008


    Mixed-Order and Higher-Order Ambiguity Functions

    Hacker, P. / Institute of Electrical and Electronics Engineers | British Library Conference Proceedings | 2011


    Ambiguity in tactile apparent motion perception

    Liaci, Emanuela / Bach, Michael / Tebartz van Elst, Ludger et al. | BASE | 2016

    Free access

    Mixed-order and higher-order ambiguity functions

    Hacker, P. / Bin Yang, | IEEE | 2011