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Article Navigation >  Journal of University of Electronic Science and Technology of China  > 2008  >  37(4): 493-496

LIU Hao, ZHOU Nan-qing. A Method of Noise Reduction for Chirp Signal Based on K-L Orthogonal Division[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 493-496.
Citation: LIU Hao, ZHOU Nan-qing. A Method of Noise Reduction for Chirp Signal Based on K-L Orthogonal Division[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 493-496.
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A Method of Noise Reduction for Chirp Signal Based on K-L Orthogonal Division

  • 1.

    National Key Laboratory of Communications,University of Electronic Science and Technology of China Chengdu 610054

  • Received Date: 2006-11-09
  • Rev Recd Date: 2007-05-13
  • Publish Date: 2008-08-15
  • Because the estimation of instantaneous frequency (IF) can be easily affected by noise, a method of noise reduction for Chirp signal based on K-L orthogonal division is presented. The signal is concentrated to a principal component, but the noise is equally distributed to several components. Thus, the SNR is improved. Both analysis and simulation indicate that this method works well and makes the estimation of IF more accurate. And the SNR can be improved over 6 dB. Moreover, associated with the characteristic of Chirp's auto-correlation function, the simplification of this method is considered for some applications.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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A Method of Noise Reduction for Chirp Signal Based on K-L Orthogonal Division

  • 1. National Key Laboratory of Communications,University of Electronic Science and Technology of China Chengdu 610054
  • Received Date: 2006-11-09
  • Rev Recd Date: 2007-05-13
  • Publish Date: 2008-08-15

Abstract: Because the estimation of instantaneous frequency (IF) can be easily affected by noise, a method of noise reduction for Chirp signal based on K-L orthogonal division is presented. The signal is concentrated to a principal component, but the noise is equally distributed to several components. Thus, the SNR is improved. Both analysis and simulation indicate that this method works well and makes the estimation of IF more accurate. And the SNR can be improved over 6 dB. Moreover, associated with the characteristic of Chirp's auto-correlation function, the simplification of this method is considered for some applications.

LIU Hao, ZHOU Nan-qing. A Method of Noise Reduction for Chirp Signal Based on K-L Orthogonal Division[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 493-496.
Citation: LIU Hao, ZHOU Nan-qing. A Method of Noise Reduction for Chirp Signal Based on K-L Orthogonal Division[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 493-496.
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