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System and method for accurately extracting parameters of power amplifier model under Gaussian white noise background

A technology of Gaussian white noise and model parameters, applied in the field of communication, can solve problems such as PA output signal interference, PA model parameters are not accurate enough, and return signal accuracy is not high, and achieve the effects of accurate PA model, noise suppression, and improved accuracy

Active Publication Date: 2021-06-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

In general, the PA output signal transmitted back to the baseband is often disturbed by noise, which affects the accuracy of the collected data
[0005] It can be seen from this that the noise will lead to low accuracy of the returned signal, so that the obtained PA model parameters are not accurate enough, and ultimately affect the pre-distortion effect

Method used

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  • System and method for accurately extracting parameters of power amplifier model under Gaussian white noise background
  • System and method for accurately extracting parameters of power amplifier model under Gaussian white noise background
  • System and method for accurately extracting parameters of power amplifier model under Gaussian white noise background

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Embodiment

[0036] A system for accurately extracting parameters of a power amplifier model under a Gaussian white noise background, including a parameter extraction module and a sequentially connected signal source module, a predistortion module, a D / A converter, a power amplifier, and an A / D converter, and the input of the parameter extraction module The terminal is connected to the output terminal of the pre-distortion module and the A / D converter, and the output terminal is connected to the pre-distortion module. During parameter extraction, the predistortion module is in a pass-through state. And the present invention adopts such as image 3 The structure shown improves on the parameter extraction module. exist image 3 In the solution shown, the signal source module generates a periodic test signal whose amplitude is not less than the signal amplitude during normal operation; the data storage module is used to collect and store multiple periodic test signals returned through the r...

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Abstract

The invention discloses a system and method for accurately extracting model parameters of a power amplifier under the background of Gaussian white noise, and a test signal generated by a signal source module is a periodic signal, so that a return signal can be ensured to be a periodic signal, and subsequent statistical averaging is facilitated. In the parameter extraction module, the statistical averaging of periodic signals is firstly carried out, so that the influence of Gaussian white noise on the signals can be weakened, and the averaged signals are closer to the actual output of the PA which is not influenced by the noise. Through the mode, the method for reducing the noise influence and obtaining the high-precision PA model parameters is provided under the condition that the channel noise is Gaussian white noise by taking the digital pre-distortion system of the power amplifier as an application scene.

Description

technical field [0001] The invention relates to the communication field, in particular to a system and method for accurately extracting parameters of a power amplifier model under the background of Gaussian white noise. Background technique [0002] In modern communication systems, it is often necessary to carry out mathematical modeling on some communication modules. In order to obtain accurate model parameters, the collected data is required to have higher accuracy. However, the existence of noise will affect the accuracy of the data, thereby reducing the accuracy of the established mathematical model. In order to improve the accuracy of the model, it is necessary to adopt certain methods to reduce the interference of noise on the data. [0003] In a wireless communication system, a power amplifier (Power Amplifier, PA) plays a vital role in the overall system performance. The ideal power amplifier can linearly amplify the input signal, but the actual power amplifier doe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/21H03B29/00
CPCH03F3/21H03B29/00Y02D30/70
Inventor 胡明杨昌睿
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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