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基于FFT的微弱GPS信號頻率精細估計

張洪倫 巴曉輝 陳杰 周航

張洪倫, 巴曉輝, 陳杰, 周航. 基于FFT的微弱GPS信號頻率精細估計[J]. 電子與信息學報, 2015, 37(9): 2132-2137. doi: 10.11999/JEIT150204
引用本文: 張洪倫, 巴曉輝, 陳杰, 周航. 基于FFT的微弱GPS信號頻率精細估計[J]. 電子與信息學報, 2015, 37(9): 2132-2137. doi: 10.11999/JEIT150204
Zhang Hong-lun, Ba Xiao-hui, Chen Jie, Zhou Hang. FFT-based Fine Frequency Estimation for Weak GPS Signal[J]. Journal of Electronics & Information Technology, 2015, 37(9): 2132-2137. doi: 10.11999/JEIT150204
Citation: Zhang Hong-lun, Ba Xiao-hui, Chen Jie, Zhou Hang. FFT-based Fine Frequency Estimation for Weak GPS Signal[J]. Journal of Electronics & Information Technology, 2015, 37(9): 2132-2137. doi: 10.11999/JEIT150204

基于FFT的微弱GPS信號頻率精細估計

doi: 10.11999/JEIT150204
基金項目: 

國家自然科學基金(61221004)

FFT-based Fine Frequency Estimation for Weak GPS Signal

  • 摘要: 為了解決傳統(tǒng)GPS接收機對弱信號頻率牽引速度比較慢、成功率較低的問題,該文提出基于FFT的頻率估計方法。為了克服導航數(shù)據(jù)比特反轉帶來的影響,用平方法和差分法分別構造的新變量作為FFT運算的輸入。實驗結果顯示,沒有比特邊沿先驗信息的情況下,差分構造變量的方法在21 dBHz弱信號時正確估計頻率概率在95%以上,有比特邊沿先驗信息的情況下,平方構造變量的方法在19 dBHz弱信號下正確檢測頻率概率仍能達到95%。
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出版歷程
  • 收稿日期:  2015-02-03
  • 修回日期:  2015-05-11
  • 刊出日期:  2015-09-19

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