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Distortion characteristic estimation method predistortion device and method thereof

A technology of pre-distortion and pre-distorter, which is applied in the field of pre-distortion device of distortion characteristic estimation method, which can solve problems such as signal impossibility, bandwidth limitation, performance degradation, etc., to achieve compensation of memory distortion, good performance, and improvement of convergence speed and the effect of precision

Inactive Publication Date: 2013-09-25
SUZHOU IND PARK CHANGCHEN COMM TECH
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Problems solved by technology

In practical implementations, the bandwidth is limited, meaning that signals like white Gaussian noise are impossible to use
In other words, choosing other forms of training signals can lead to significantly lower performance

Method used

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  • Distortion characteristic estimation method predistortion device and method thereof
  • Distortion characteristic estimation method predistortion device and method thereof
  • Distortion characteristic estimation method predistortion device and method thereof

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Embodiment Construction

[0040] Detailed reference will be given below to examples of the present invention. Although the present invention has been illustrated and illustrated by these embodiments, it should be noted that the present invention is not limited to these embodiments. On the contrary, the invention covers all alternatives, modifications and equivalents which are within the spirit and scope of the invention as defined by the appended claims.

[0041] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, means, components and circuits are not described in detail so as to highlight the gist of the present invention.

[0042] Figure 4 Shown is a schematic structural diagram of a distortion characteristic estimation method (DCEM for short) predi...

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Abstract

The invention discloses a distortion characteristic estimation method predistortion device and a method thereof which are applied to a broadband mobile communication system. The device comprises a predistorter and a power amplifier. The predistorter is used for the predistortion of an input signal of the power amplifier. The device also comprises a training signal generator used for generating a training signal and transmitting the generated training signal to the predistorter, and a distortion estimator used for utilizing the training signal generated by the training signal generator to extract a power amplifier distortion characteristic before the working of the predistorter to obtain the inverse characteristic of the power amplifier distortion characteristic, wherein the initial state parameters of the predistorter are calculated through the inverse characteristic and are stored in the predistorter. By employing the device and the method, memory distortion and nonlinear distortion can be eliminated at the same time, the convergence speed and accuracy can be raised, and in the condition that a sampling clock synchronization error is large, the good performance can be maintained.

Description

technical field [0001] The invention relates to the broadband communication neighborhood, in particular to a distortion characteristic estimation method predistortion device and method. Background technique [0002] In the past 20 years, mobile communication has shown explosive growth, and the wireless communication services provided have also expanded from pure voice services in the 1990s to comprehensive multimedia wireless broadband data services. However, with the continuous increase of mobile users and the continuous expansion of wireless network scale, the demand for energy in communication networks has also shown a huge increase, which has caused a series of environmental and energy issues. According to relevant data, the information and communication industry has become the fifth largest energy-consuming industry in the world, and its carbon emissions account for 2.5% of the total global carbon emissions. [0003] As far as my country is concerned, according to the ...

Claims

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Application Information

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IPC IPC(8): H04L25/49
Inventor 任智源张海林杨栋武德斌王涛宁
Owner SUZHOU IND PARK CHANGCHEN COMM TECH
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