The Application Of The All Phase Method In The Spectrum Analysis And Digital Filter

This dissertation deals mainly with the conception and the application of the All Phase method in the spectrum analysis and the digital filter designing. First, the paper introduces the conception and the character of the All Phase analysis method, presenting it has excellent characters becase it considers all complexions of the input data. It can be verified by experimental results that the swing spectrum of the All Phase equivalence with the power spectrum of the traditional method.Secondly, by the introduction of the conception of the All Phase, three equivalent structures of the All Phase is advanced. And the zero phase characteristics of the All Phase filter is presented through analysis of its amplitude and phase characteristics.Thirdly, giving the conception about All Phase shift filter based on the traditional frequency sample filter, it has the virtues of the traditional frequency sample filter, and can conquer the disadvantage that the cut-off frequence is forward. All Phase shift filter have holistic shift and the sum of the partial shift. The holistic shift is fit for the instance that the shift gene is 0.5, the sum of the partial shift is fit for the instance that the shift gene is arbitrary.Finally, introducing the application of the All Phase analysis method, which including the frequence analysis and the digital filter design. Thereinto, in the application of the frequence analysis, there are two domain that the discrete spectrum correction and the reconstruction method for the signal; in the application of the frequence analysis, there are two domain that the Zero phase digital filter design method based on the All Phase and the All Phase table self-adaptable filter design method. Experimental results have shown that the good effects have gained in these domain by using the All Phase analysis method.