吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (3): 818-821.doi: 10.7964/jdxbgxb201403038

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Broadband direction-arrival estimation of Chirp signal using fractional Fourier transform

YANG Wei1,2,SHI Yao-wu2   

  1. 1.State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022,China;
    2. College of Communication Engineering, Jilin University, Changchun 130022,China
  • Received:2012-08-28 Online:2014-03-01 Published:2014-03-01

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Abstract: We consider the problem of estimating the Directions of Arrival (DOA) of broadband Chirp signal sources using a sensor array. Since the Fractional Fourier Transform (FRFT) can rotate the time-frequency plane, the frequencies of Chirp signals are concentrated by a properly chosen rotational angle, and the direction array is also obtained in FRFT domain. By this way, the broadband DOAs estimation is then successfully processed using the well existing narrowband DOA estimation algorithms. Simulation results demonstrate that the proposed method is quite simple and has much better performance compared to the methods such as the Coherent Signal Subspace method.

Key words: information processing technology, Chirp signal, direction of arrival(DOA), fractional Fourier transform(FRFT)

CLC Number: 

  • TN911.7
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