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• Huiling HOU

  Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
  Shanghai Engineering Center for Microsatellites, Chinese Academy of Sciences
  University of Chinese Academy of Sciences

• Kang WU

  Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
  Shanghai Engineering Center for Microsatellites, Chinese Academy of Sciences

• Yijun CHEN

  Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences

• Xuwen LIANG

  Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
  Shanghai Engineering Center for Microsatellites, Chinese Academy of Sciences

In this letter, a new rapid and accurate synchronization scheme based on PMF-FFT for high dynamic GPS receiver is proposed, with a fine Doppler frequency estimation inserted between the acquisition and tracking modules. Fine Doppler estimation is firstly achieved through a simple interpolation of the PMF-FFT outputs in terms of LSE criterion. Then a high dynamic tracking loop based on UKF is designed to verify the synchronization speed and accuracy. Numerical results show that the fine frequency estimation can closely approach the CRB, and the high dynamic receiver can obtain fine synchronization rapidly just through a very narrow bandwidth. The simplicity and low complexity give the proposed scheme a strong and practical-oriented ability, even for weak GPS signals.