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The computer- or microprocessor-based signal processing technology is one of the demodulation and processing methods capable of suppressing noise interference and enhancing signal-to-noise ratio. In this paper, the technology of software filtering and demodulation based on wavelet transform is presented. According to the features of band- pass and time-frequency domain localization of wavelet transform, a linear combine wavelet transform is used to approach an ideal narrow-band filter, and the designed filter has a fine filtering character. It provides a more convenient method for signal demodulation analysis and multi-pass-band components filtering in engineering signal processing. It has been used in the case of optical current transformer and can be developed to other signal processing applications.
Gang Zhang,Zu-De Zhou, andYouping Chen
"Signal processing technology based on wavelet transform", Proc. SPIE 4414, International Conference on Sensor Technology (ISTC 2001), (14 September 2001); https://doi.org/10.1117/12.440141
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Gang Zhang, Zu-De Zhou, Youping Chen, "Signal processing technology based on wavelet transform," Proc. SPIE 4414, International Conference on Sensor Technology (ISTC 2001), (14 September 2001); https://doi.org/10.1117/12.440141