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Filter filtering method based on RAG-n algorithm and digital decimation filter

A technology for extracting filters and filters, applied in digital technology networks, electrical digital data processing, instruments, etc., can solve problems such as large hardware loss and low extraction rate, and achieve the effect of small hardware resources

Pending Publication Date: 2021-03-12
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a filter filtering method based on the RAG-n algorithm and a digital decimation filter, which are used to solve the problems of low decimation rate and large hardware loss in the prior art

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  • Filter filtering method based on RAG-n algorithm and digital decimation filter
  • Filter filtering method based on RAG-n algorithm and digital decimation filter
  • Filter filtering method based on RAG-n algorithm and digital decimation filter

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Embodiment Construction

[0039] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] see figure 1 , in an embodiment of the invention, the filter filtering method based on the RAG-n algorithm of the present invention comprises the following steps:

[0041] Step S11, quantizing the half-band filter tap coefficients, and using the RAG-n algorithm to optimize the quantized tap coeff...

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Abstract

The invention provides a filter filtering method based on an RAGn algorithm and a digital decimation filter, wherein the filter is a half-band filter. The method comprises the following steps: quantizing a tap coefficient of the half-band filter, and optimizing the quantized tap coefficient by using the RAGn algorithm; cascading the optimized half-band filters, realizing double digital extractionfor each stage, and realizing 2N times of digital extraction for N stages of cascading; controlling the decimation rate of the output signal of the cascaded half-band filter through the input signal of the cascaded half-band filter so as to carry out gating output and finish filtering. According to the filter filtering method based on the RAGn algorithm and the digital decimation filter, the half-band filters are used for cascade connection to achieve multi-magnification extraction, no large hardware loss is brought, and meanwhile the extraction rate is controlled by an input signal.

Description

technical field [0001] The invention relates to the technical field of digital signal processing, in particular to a filter filtering method based on the RAG-n algorithm and a digital decimation filter. Background technique [0002] In current electronic systems, most ADCs improve the performance of the system by oversampling the signal. If the system directly processes the sampled signal, it will bring a very large power consumption to the system, and due to the processing speed of the system Limited, it is often difficult to directly perform various types of real-time processing on the sampled high-rate digital signals. [0003] The digital down-conversion technology is mainly to down-sample the oversampled and quantized signal through a digital decimation filter, so that the sampling frequency of the signal is reduced, so that the system can conveniently process the baseband signal. [0004] When downsampling the signal, it is often necessary to perform multiple downsamp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/337H03H17/00
CPCG06F30/337H03H17/00
Inventor 王伍峰邱雷韩志刚
Owner TONGJI UNIV