Analysis and melioration for the filter arithmetic of closed-loop fiber optic gyroscope

For applying the fiber optic gyroscope (FOG) to various projects. The configuration of the digital filter is meliorated. A new filter combining multilevel sampling rate converter (SRC) with a pectinate band-stop filter is designed. The inside-loop signal processing is separated from the outside-loop, and different method is used to deal with them. A Kaiser-Bessel window FIR filter is applied in the outside-loop signal processing. The theory of multi-rate signal processing and the method for realization are introduced. The optimized arithmetic is simulated by MATLAB, and the results indicate that the method restrains the frequency distortion and improves the sensitivity of the FOG.