Digital signal filtering apparatus and method having down sampling function

A digital signal and filtering device technology, which is applied in the field of high-efficiency integrated processing devices with comprehensive filtering and down-sampling functions, can solve the problems of large hardware resources and occupation, and achieve the effect of low hardware resources and high-efficiency processing

Active Publication Date: 2007-10-31
RDA MICROELECTRONICS SHANGHAICO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The traditional signal processing is to perform down-sampling processing after the filtering processing is completed, which will take up a lot of hardware resources

Method used

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  • Digital signal filtering apparatus and method having down sampling function
  • Digital signal filtering apparatus and method having down sampling function
  • Digital signal filtering apparatus and method having down sampling function

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Embodiment Construction

[0025] As shown in Figure 1, the digital signal filtering device with down-sampling function of the present invention includes a signal access address generation circuit, a signal register circuit, a filter coefficient read address generation circuit, a filter coefficient register circuit, a multiplier, an accumulator device and output control circuit. The signal access address generation circuit is used to correctly access the signal, the signal register circuit is used to buffer the input signal, and output the signal to the subsequent processing circuit at a clock frequency different from the frequency of the input signal, and the filter coefficient read address generation circuit For correctly reading the stored filter coefficients, the filter coefficient register circuit is connected with the filter coefficient read address register circuit, used to read the corresponding coefficients of the filter, the multiplier and the signal register circuit and the filter coefficient ...

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Abstract

The invention discloses a digital signal filter device and method with function of down sampling, the digital signal filter device includes signal access address generator, signal consignation circuit, filter coefficient read address generating circuit, filter coefficient consignation circuit, multiplier, accumulator and output control circuit. The invention can realize the integral process of digital signal filter and down sampling, and the hardware resource of realizing the function can be decreased to the lowness.

Description

technical field [0001] The invention relates to digital signal filtering, in particular to a high-efficiency integrated processing device and method with integrated filtering and down-sampling functions. Background technique [0002] In digital signal processing (DSP), a large number of different digital signal filters are used. In some applications, it may occur that the signal needs to be filtered and down-sampled at the same time. Filtering is mainly to process the signal, thereby changing some characteristics of the signal itself. For example, the original signal may be noisy, and after filtering, the noise can be reduced. Downsampling is to change the sampling speed of the signal. For example, the sampling rate of the original signal is 50MHz, that is, 50 million samples per second. However, such a high sampling frequency may not be needed in practical applications. Therefore, downsampling processing is required instead of Reduce its frequency to the required value, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02
Inventor 保罗·贝克曼刘勇黄思远
Owner RDA MICROELECTRONICS SHANGHAICO LTD
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