Estimation and compensation method of TIADC system based on polynomial model

A technology of polynomial model and compensation method, which is applied in the field of estimation and compensation of TIADC system, can solve problems such as failure of circuit correction effect and achieve good effectiveness

Inactive Publication Date: 2017-02-01
SUN YAT SEN UNIV +1
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  • Abstract
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  • Estimation and compensation method of TIADC system based on polynomial model
  • Estimation and compensation method of TIADC system based on polynomial model
  • Estimation and compensation method of TIADC system based on polynomial model

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Embodiment 1

[0038] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings so that skilled persons can better understand the present invention. Note that the description of some known knowledge will dilute the main content of the present invention, and the description of these knowledge will not be introduced in detail here.

[0039] figure 1 is a schematic diagram of the multi-channel TIADC system of the present invention, figure 2 It is a schematic diagram of the channel transfer function model of the TIADC system. The input signal is input in M ​​channels, and each channel uses the same sampling rate but different sampling time (the difference between adjacent channels is T s Time) to sample the high-speed input signal, and finally combine the output signal, so as to realize the analog-to-digital conversion of high-speed sampling. figure 2It is a schematic diagram of the channel transfer function model, which can transfe...

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Abstract

The invention discloses an estimation and compensation method of a TIADC system based on a polynomial model, and belongs to an estimation and compensation algorithm of digital back-end processing based on a channel transfer function model. Any linear error can be contained, comprising, but not limited to, time errors, gain errors, pole-zero errors, etc. Therefore, by adoption of a correction method based on a channel transfer function, an error effect of any linear filter can be transferred into a frequency domain response mismatch error, and by adoption of the estimation and compensation method disclosed by the invention, estimation and compensation of a high-speed time interleaved analog-to-digital conversion is realized, and the estimation and compensation method has the advantages of good validity, universality and practicability.

Description

technical field [0001] The present invention relates to the technical field of high-speed analog-to-digital conversion, and more specifically, relates to a method for realizing estimation and compensation of a TIADC system based on a polynomial model. Background technique [0002] With the continuous development of integrated circuit technology and the promotion of digital technology, the requirements for the sampling rate and sampling accuracy of the analog-to-digital conversion device ADC are getting higher and higher. Not only the data acquisition system is required to have a high sampling rate, but also a high sampling rate precision. In actual application, there is a high dependence on the real-time sampling rate and sampling accuracy. However, the maximum sampling rate of ADC is limited by its resolution. There is a contradiction between resolution and sampling rate. High sampling rate requires shorter conversion time, while high resolution requires shorter conversion...

Claims

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Application Information

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IPC IPC(8): H03M1/06H03M1/10H03M1/12
CPCH03M1/0626H03M1/1028H03M1/121
Inventor 谭洪舟蔡彬李宇农革
Owner SUN YAT SEN UNIV
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