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A high-order interpolation filter and method

A high-order interpolation, interpolation filtering technology, applied in electrical components, digital technology networks, impedance networks, etc., to ensure the interpolation effect, reduce difficulty, and facilitate engineering implementation.

Active Publication Date: 2021-09-03
BEIJING SHENGFEIFAN ELECTRONIC SYST TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Embodiments of the present invention provide a high-order interpolation filter and method, aiming to solve the problem of how to implement high-order interpolation filtering on bandpass data simply and efficiently

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  • A high-order interpolation filter and method
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  • A high-order interpolation filter and method

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Embodiment Construction

[0047] 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.

[0048] Such as figure 1 As shown, the high-order interpolation filter provided by the embodiment of the present invention includes:

[0049] A zero-frequency filtering unit 11 is configured to perform down-conversion processing on the input data, so that the center frequency of the input data is moved to a zero frequency;

[0050] The interpolation filtering unit 12 is used to perform interpolation filtering processing on the data moved to the z...

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Abstract

The invention discloses a high-order interpolation filter and a method. The high-order interpolation filter includes: a 0-frequency filter unit, which is used for down-converting the input data, so that the center frequency of the input data is moved to the zero frequency; The first-order interpolation filter performs interpolation filtering; the higher-order interpolation filter includes N low-pass filters with a length of L, and both L and N are positive integers; the sampling rate of the low-pass filter is the preset sampling rate of the high-order interpolation filter 1 / N of the rate, and the coefficients are the preset coefficients of the high-order interpolation filter, which are obtained by sampling once every L value; the frequency shifting unit is used to perform up-conversion processing on the interpolated and filtered data, so that the center frequency of the data is shifted to Enter the center frequency of the data. The invention replaces the high-order interpolation filter with a low-pass filter bank, which ensures the interpolation effect and reduces the calculation amount of the interpolation algorithm and the complexity of filter design.

Description

technical field [0001] The invention relates to the technical field of data signal processing, in particular to a high-order interpolation filter and method. Background technique [0002] In the digital signal processing system, the interpolation filter is an important part, especially in the digital up-conversion signal processing, the interpolation filter is one of the core modules. In order to achieve a satisfactory filtering effect, the order of the filter is generally required to be relatively high. However, in practical engineering applications, due to the limitation of the operation speed of processors such as DSP, the realization of high-order interpolation filters is very difficult, especially in single-processor systems, the method of single-stage filtering cannot realize high-order interpolation filtering device. Therefore, under the condition of limited computing speed of the processor, how to implement high-order interpolation filtering for band-pass data simp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02H03H17/06
CPCH03H17/0211H03H17/0657H03H2017/0214
Inventor 陆存波黄米国徐磊张向锋孙智超
Owner BEIJING SHENGFEIFAN ELECTRONIC SYST TECH DEV CO LTD
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