Volume 37 Issue 2
Feb.  2011
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Hua Chunhong, Ren Zhang, Zhang Minhuet al. Pre-whitening filter of fractal noise in fiber optic gyroscope[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(2): 216-219. (in Chinese)
Citation: Hua Chunhong, Ren Zhang, Zhang Minhuet al. Pre-whitening filter of fractal noise in fiber optic gyroscope[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(2): 216-219. (in Chinese)

Pre-whitening filter of fractal noise in fiber optic gyroscope

  • Received Date: 24 Dec 2009
  • Publish Date: 28 Feb 2011
  • Fractal noise in fiber optic gyroscope (FOG) usually is long-term dependent, which causes FOG a rather slow drift. In order to filter this noise, a pre-whitening filter based on fractional difference (FD) was proposed. By this filter, fractal noise could be transformed into Gaussian white noise (GWN). And through wavelet analysis, the pre-whitening noise could be eliminated by Bayes soft-threshold denoising in wavelet domain. On the two aforementioned steps, it came into a pre-whitening filter method of fractal noise. After the test data processing of FOG-VG949p, the results show that its fractal noise was removed efficiently, so the slow drift is restrained. The high frequency noise terms of FOG also greatly decrease.

     

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