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COMPUTER SAMPLED DATA PRE-PROCESSING OF THE COULOSTATIC TECHNIQUES

ZHAO Changjiu LIU Zhijun CHEN Xuner (Hunan University)  
An improvement in designing non-recursive digital filter for coulostatic measurements is pro- posed.The new technique involves not only measur ements of filter coefficients,i.e.unit impulse response addend series by FFT (Fast Fourier Transformation),but also improvements of filter capability and allevia- tion of filtered curve distortion by a series of means. In designing the non-recursive digital filter,five window functions,Rectangle,Haning,Hamming, Blackman and Kaiser windows are all considered.The Kaiser window is verified both theoretically and ex- perimentally to be a capable filter.
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