Unlock instant, AI-driven research and patent intelligence for your innovation.

Farrow filter based on logic circuit and its realization method

A logic circuit and filter technology, applied in the communication field, can solve the problems of not supporting the online configuration rate and the inflexible Farrow filter hardware architecture, so as to enhance the market competitiveness and reduce the occupation of hardware resources

Inactive Publication Date: 2017-08-25
NANJING ZHONGXING XIN SOFTWARE CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Aiming at the problem that the above-mentioned existing Farrow filter hardware architecture is not flexible enough and does not support online configuration rate, the present invention provides a logic circuit-based Farrow filter and its implementation method to at least solve the above problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Farrow filter based on logic circuit and its realization method
  • Farrow filter based on logic circuit and its realization method
  • Farrow filter based on logic circuit and its realization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0045] The embodiment of the present invention provides a logic circuit-based Farrow filter and its implementation method. The technology applies the Farrow filter to the logic circuit, so as to improve the computing capability of the Farrow filter for real-time processing.

[0046] When using logic circuits to implement Farrow filters, at least the following issues need to be considered:

[0047] 1. Time coefficient μ l and μ k It can be seen from the mathematical model that these two time coefficients are real-time changing floating-point data determined by the input and output sampling rates, and it is necessary to perform fixed-point processing and real-time online calculation of the time coeff...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed are a Farrow filter based on a logic circuit and an implementation method thereof. The filter includes: a strobe switch configured to control the operating mode of the Farrow filter according to the configured proportional relationship between an input data sampling rate and an output data sampling rate; an interpolation filtering device configured to perform interpolation filtering on the input data under the control of the strobe switch and during interpolation filtering perform a bit-interception operation on the intermediate data according to a first preset bit width to obtain a first class of pointing data; an extraction filtering device configured to perform extraction filtering on the input data under the control of the strobe switch and during extraction filtering perform a bit-interception operation on the intermediate data according to a second preset bit width to obtain a second class of pointing data. The present invention solves the problem that the hardware architecture of the existing Farrow filter is not flexible enough and does not support configuring a rate online and reduces hardware resource occupation by performing a bit-interception operation on the intermediate data.

Description

technical field [0001] The invention relates to the communication field, in particular to a logic circuit-based Farrow filter and its implementation method. Background technique [0002] The biggest feature of the Farrow filter is that it can use a set of fixed coefficients to realize the transformation of any sampling rate of the signal. Its theoretical basis is based on continuous-time models such as figure 1 shown. [0003] The role of the Farrow filter is to figure 1 The process of is realized entirely in the digital domain: 1) using an ideal DAC and an analog filter h a (t) restore the digital signal x(k) to the quasi-original signal y a (t); 2) for y a (t) Perform re-sampling to obtain the rate-converted digital signal y(l). filter h a The performance of (t) determines the time domain and frequency domain quality of the output signal. [0004] The digitalization of this simulation process can be deduced and proved by mathematical theory, and the mathematical mo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03H9/46
CPCH03H17/0027H03H17/0642
Inventor 陈永红岳亮苟春茂
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD