A Fast Filtering Method for Sampling Rate Conversion of Multiple Digital Sources in Photoelectric Transformer
A technology of photoelectric transformer and digital source, applied in the direction of digital technology network, electrical components, impedance network, etc., can solve the problems of large differential current, affecting output amplitude characteristics, spectrum confusion, etc., achieve good frequency selection, overcome amplitude The effect of frequency characteristic distortion
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[0059] The present invention will be further described below in conjunction with the accompanying drawings.
[0060] The fast filtering method for the sampling rate conversion of multiple digital sources in photoelectric transformers, firstly, the Butterworth filter is used as a prototype, and the bilinear transformation method is used to design the digital filtering characteristics of the maximum flat infinite impulse response; then according to the FRR method, the The output sequence is filtered in order, and then the obtained result is reversed and passed through the filter in reverse, and then the obtained result is reversed and output to obtain an accurate zero-phase distortion output sequence.
[0061] combine figure 1 , give explanations with regard to the realization steps of the present invention.
[0062] (1) Calculation of the interpolation sampling ratio U / D: According to the normalization principle, the signal sampling values of the two digital source photoelec...
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