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High-order digital filtering system and high-order digital filtering method

A technology of digital filtering and filter coefficients, applied in digital technology networks, impedance networks, electrical components, etc., can solve problems such as complex implementation methods, high resource overhead, and difficult engineering implementation, achieving high engineering achievability and algorithm architecture. Simple, low resource overhead

Active Publication Date: 2015-02-04
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

[0004] The implementation of traditional parallel FIR digital filtering in FPGA is very complicated. The digital signal enters into FPGA in parallel N channels, and in FPGA, a new parallel sequence of N channels is formed through rearrangement and combination of data, and then multiplied and added with filter coefficients to output Parallel N-way data, that is, the parallel output data of the filter
The signal recombination logic of this algorithm in the FPGA is very complex, and the multiplication and addition operation of parallel N channels and filter coefficients requires the use of a large number of multiplication units in the FPGA, which has a large resource overhead and is not easy to implement in engineering

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0033] In this specific embodiment, an example is taken in which 4 channels of quantized Gaussian white noise data are processed in parallel through 63-order FIR filtering.

[0034] Such as figure 1 As shown in the high-order digital filtering sy...

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Abstract

The invention provides a high-order digital filtering system and a high-order digital filtering method. By virtue of time-frequency conversion of a digital signal, parallel data are subjected to multiply-accumulation operation based on a frame form in a frequency domain through response to a filter coefficient frequency domain, so that digital parallel realization of high-order FIR filtering is finished. The fussy realizing way of the traditional parallel digital filtering by virtue of sequence recombination is greatly simplified.

Description

technical field [0001] The invention relates to a filtering system and method, in particular to a filtering system and method suitable for high-order digital filtering. Background technique [0002] Digital filtering is the basic composition of many digital signal processing systems, and they are widely used in many fields such as communication, signal processing, image processing, and pattern recognition. At present, there are many ways to realize FIR filtering, such as using DSP chip, application-specific integrated circuit ASIC and FPGA, etc., using DSP to realize will be limited by running speed and relatively long development time, ASIC will be limited by development cycle, The implementation of FPGA will balance these factors. Due to its short development cycle, easy implementation, and strong versatility, it has a wide range of applications in many fields and has great development potential. [0003] The main design method of FIR filtering is to use multiply and accu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02
Inventor 刘宪军陈俊霖喻令向川云
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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