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FIR (finite impulse response) filter and filtering method thereof

A filter and filter coefficient technology, applied in impedance networks, digital technology networks, electrical components, etc., can solve problems such as increased power consumption, FIR filters cannot meet increasing diversification, and waste of resources, and achieve the effect of changing performance

Inactive Publication Date: 2018-05-01
西安烽火电子科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you need to achieve different bandwidth, different sampling rate, different suppression ability and other requirements, you need to design multiple filters in the FPGA to meet different requirements, resulting in waste of resources and increased power consumption
Therefore, the implementation method of this traditional FIR filter cannot meet the increasingly diverse needs.

Method used

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  • FIR (finite impulse response) filter and filtering method thereof
  • FIR (finite impulse response) filter and filtering method thereof

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] The embodiment of the present invention provides a kind of FIR filter, and described FIR filter is realized based on FPGA chip, such as figure 1As shown, the FIR filter includes: a parameter control module, a filter coefficient dual-port RAM module, an operation control module, an input data storage module, and a convolution operation module.

[0044] The parameter control module is provided with a first parameter output terminal, the filt...

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Abstract

The invention belongs to the technical field of digital signal processing and discloses a FIR (finite impulse response) filter and a filtering method thereof. The FIR filter has the advantages that filtering coefficient is changed according to different needs to as to change properties of the filter, and working frequency of the filter is changed by changing parameter configuration of sampling frequency of the filter.

Description

technical field [0001] The invention belongs to the technical field of digital signal processing, and in particular relates to an FIR filter and a filtering method thereof. Background technique [0002] The FIR (Finite Impulse Response) filter is the most basic component in a digital signal processing system. It can ensure arbitrary amplitude-frequency characteristics while having strict linear phase-frequency characteristics. At the same time, its unit sampling response is finite, so the filter The filter is a stable system, so FIR filters are widely used in audio, signal processing, communication, image processing, pattern recognition and other fields. By changing the frequency characteristics of the signal, it plays the role of obtaining useful signals, filtering out noise, and stabilizing the loop. Due to the powerful parallel processing capability of FPGA, it has become the most common way to realize FIR filter in FPGA. [0003] Usually the FIR filter implemented in F...

Claims

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Application Information

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IPC IPC(8): H03H17/02H03H17/06
CPCH03H17/0223H03H17/06
Inventor 周勇敢李林峰王小军李德荣睢希赵勇仇妙月
Owner 西安烽火电子科技有限责任公司
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