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Power amplifier related device, power amplifier predistortion system and modeling method

A power amplifier and pre-distortion technology, which is applied in the direction of improving amplifiers to reduce nonlinear distortion, etc., can solve the problems of difficult memory effect segmentation model, and the difference between front and rear sample values, so as to achieve accurate modeling and reduce numerical instability And the effect of computational complexity and high flexibility

Inactive Publication Date: 2014-11-26
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the input samples of the power amplifier model need to be processed sequentially over time, so the samples before and after may fall into different segmental intervals and be processed by different nonlinear functions
Therefore, it is difficult to introduce memory effects into segmental models

Method used

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  • Power amplifier related device, power amplifier predistortion system and modeling method
  • Power amplifier related device, power amplifier predistortion system and modeling method
  • Power amplifier related device, power amplifier predistortion system and modeling method

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Embodiment Construction

[0055] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In order to make the present invention clear and concise, descriptions of components of the prior art that may make the present invention unclear are omitted herein. In addition, the same or similar components are described herein with the same reference numerals, and repeated descriptions thereof are omitted.

[0056] Embodiments of the present invention provide a power amplifier model identification device, which can be used for figure 1 The power amplifier model identification module 108 is shown. It should be noted that although the figure 1 Among them, the power amplifier model identification module 108 is connected with the power amplifier 102 etc. online, but the power amplifier model identification module 108 can work offline, that is, the model identification device of the present invention can operate offline after collecting the input and ou...

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Abstract

The invention relates to a power amplifier related device, a power amplifier predistortion system and a modeling method. The power amplifier related device comprises a modulus calculation unit, a selection unit and a plurality of output calculation units, wherein the modulus calculation unit is used for calculating the modules of an input signal; the selection unit is used for determining one of the plurality of the output calculation units to serve as the output calculation unit into which an input signal needs to be input according to the modulus calculated by the modulus calculation unit; and each output calculation unit calculates a signal to be output according to the input signal input into the output calculation unit.

Description

technical field [0001] The embodiment of the present invention is related to the power amplifier, and the embodiment of the present invention is related to the nonlinear power amplifier with memory effect. Background technique [0002] A power amplifier (abbreviated as a power amplifier) ​​is an essential part of a wireless transmitter. Modeling the power amplifier can be used for the performance simulation of the communication system on the one hand, and facilitates the design of the predistorter on the other hand. The behavior model of the power amplifier is to use some mathematical expression to describe the input-output relationship of the power amplifier. It has become an important modeling method of the power amplifier because of its simplicity and high efficiency. figure 1 A block diagram of the method for modeling the behavior of a power amplifier is shown. Such as figure 1 As shown, a part of the radio frequency input signal of the power amplifier 102 passes thro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32
Inventor 李辉施展周建民孙刚
Owner FUJITSU LTD