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Design method of asynchronous shaping filter

A filter design, filter technology, applied in impedance networks, digital technology networks, electrical components, etc., can solve problems such as difficult timing control, large number of multipliers and adders, and large delay.

Active Publication Date: 2016-06-01
PANDA ELECTRONICS GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, the fractional shaping filter output is realized by connecting the resampling module after the integer shaping filter, which requires a large number of multipliers and adders, consumes a large amount of resources, and is difficult to control timing and has a large delay.

Method used

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  • Design method of asynchronous shaping filter
  • Design method of asynchronous shaping filter
  • Design method of asynchronous shaping filter

Examples

Experimental program
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Embodiment

[0075] An asynchronous shaping filter design method in this embodiment, such as figure 1 As shown, it includes a look-up table generation module, an NCO control module and a shaping filter module, wherein the look-up table generation module is used to generate shaping filter coefficients and make a look-up table, and the NCO control module is used to generate the input signal rate and sample point phase information , the shaping filter module is used to realize the shaping output from the input signal rate to the baseband processing clock, which specifically includes the following steps.

[0076] Step 1: According to the given filter parameters, the lookup table generation module generates the shaping coefficients of the shaping filter, and the lookup table generation module creates the lookup table according to the shaping coefficients of the shaping filter. like figure 2 The specific implementation process is as follows:

[0077] Step 11, for the given filter parameters, ...

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Abstract

The invention discloses a design method of an asynchronous shaping filter. The filter comprises a searching table generation module, an NCO control module and a shaping filter module; the searching table generation module is used for generating a shaping filter coefficient and producing a searching table; the NCO control module is used for generating an input signal rate and sample point phase information; the shaping filter module is used for realizing shaping output from the input signal rate to a base band processing clock. According to the method of the invention, the base band processing clock and the processing signal rate are not limited to integral multiple relation; the method has relatively strong universality, is simple in realization and time sequence control, occupies relatively few resources, is liable to engineering realization and modularization processing and is convenient for transplant.

Description

technical field [0001] The invention relates to a method for designing a universal asynchronous shaping filter, which belongs to the technical field of a wireless communication physical layer. Background technique [0002] In a digital transmission system, the transmission bandwidth of the system is limited, while the spectral width of the signal is infinite. Transmitting a signal with an infinite bandwidth in a limited bandwidth will cause distortion of the signal's time-domain waveform and cause inter-symbol crosstalk. In order to effectively To utilize spectrum and eliminate inter-symbol crosstalk, it is necessary to shape and filter the transmitted signal. [0003] The traditional shaping filter design usually adopts the integer multiple shaping method, that is, the filtering output sampling rate is an integer multiple of the input signal rate. , and under normal circumstances, the given clock source and signal rate do not have an integer multiple relationship, and an e...

Claims

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Application Information

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IPC IPC(8): H03H17/00
CPCH03H17/00H03H2017/0072
Inventor 陈章安君帅张生玥刘剑锋
Owner PANDA ELECTRONICS GROUP
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