Filter and filtering method
A filter and sub-filter technology, used in electrical components, digital technology networks, impedance networks, etc., can solve problems such as rate conversion, reduce the clock frequency, ensure the clock frequency, and reduce the difficulty of FPGA layout and wiring.
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[0071] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
[0072] In the following, some terms used in the embodiments of the present application are explained, so as to facilitate the understanding of those skilled in the art.
[0073] (1) The essence of multi-rate signal processing is to use digital signal processing methods to directly change the rate of sampling signals, and extraction and interpolation are the basic links. Among them, the transformation that reduces the sampling signal rate is called decimation; the transformation that increases the sampling signal rate is called interpolation.
[0074] Extraction is to take the original signal every D-1 to form a new sampled signal, where D is an integer greater than 1, called the extraction factor, and the module that realizes this process can be a D extractor. Since the extracted data will cause sp...
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