吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (03): 813-818.doi: 10.7964/jdxbgxb201303042

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Efficient Doppler estimation for UWA OFDM systems

GUO Tie-liang1,2, ZHAO Dan-feng1, YANG Da-wei1   

  1. 1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001;
    2. Department of Science, Heilongjiang Institute of Science and Technology, Harbin 150027
  • Received:2012-05-14 Online:2013-05-01 Published:2013-05-01

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Abstract: Traditional Doppler algorithm is not robust to the fast-varying Under Water Acoustic (UWA)Orthogonal Frequency Division Multiplying (OFDM) systems. To overcome the shortcoming, an efficient Doppler estimation algorithm was proposed for the system. First, the sample rate conversion was completed using oversampling and linear interpolation methods. Then, the accurate Doppler shift was acquired by combining the candidate value of Doppler factor. Simulation results show that the proposed algorithm can not only ensure the system performance, but also reduce the computational load of the receiver. Therefore, it is suitable for high-speed real-time UWA OFDM systems.

Key words: communication technology, orthogonal frequency division multiplexing(OFDM), Doppler shift, sample rate conversion, Doppler factor, underwater acoustic communication(UWA)systems

CLC Number: 

  • TN929.3
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