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Pre-estimate Relative Intensity Noise subtraction performance of FOG by using signal cross-correlation

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4 Author(s)
Yonggang Zhang ; Automation College, Harbin Engineering University, Heilongjiang Province, China ; Honggang Chen ; Tao Li ; Deshuang Wang

A method of pre-estimate Relative Intensity Noise (RIN) subtraction performance in Interference Fiber Optic Gyroscope (IFOG) is introduced. Experiment shows that the noise subtraction result depends on the cross-correlation coefficient between FOG's output and coupler's free port signal. The variance of the noise would rise when cross-correlation coefficient is lower then 0.5 and reduce to 17.16% with crosscorrelation coefficient 0.91. Estimating the cross-correlation coefficient before noise subtraction can avoid the situation that the noise increase after noise subtraction, and finally enhance the reliability of noise subtraction.

Published in:

Information and Automation (ICIA), 2011 IEEE International Conference on

Date of Conference:

6-8 June 2011