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Digital predistortion correction method and device

A digital pre-distortion and correction method technology, applied in the field of communication, can solve the problems of complex acquisition process of model parameters and low correction efficiency

Active Publication Date: 2020-01-03
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the acquisition process of model parameters is more complicated and the correction efficiency is lower, the present invention provides a digital predistortion correction method and device

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  • Digital predistortion correction method and device

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Embodiment Construction

[0208] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0209] DPD technology is a key technology that compensates the non-linearity of the power amplifier in the digital domain, which can make the power amplifier work in a high-efficiency saturation state without losing linearity.

[0210] like figure 1 As shown, the basic working principle of DPD technology is: build a DPD module 01 in the digital baseband, and pre-distort the input signal before entering the power amplifier (English: Power Amplifier; PA) 02. The model of the DPD module 01 is DPD model, the model of PA02 is the amplifier model, if the DPD model is the inverse function of the amplifier model, then when the input signal passes through the cascaded DPD module 01 and PA02, it will be linearly amplified, thus avoiding the inpu...

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Abstract

The present invention relates to the field of communications. Provided are a digital pre-distortion correcting method and device. The method comprises: determining, according to pre-selected input signals, adjusting factors of a dynamic linear model about the pre-selected input signals in an amplifier model, the pre-selected input signals being at least two signals in a preset input signal set; determining, according to the pre-selected input signals, adjusting factors of a dynamic non-linear model about the pre-selected input signals in the amplifier model; establishing, according to the adjusting factors of the dynamic linear model about the pre-selected input signals and the adjusting factors of the dynamic non-linear model about the pre-selected input signals, an amplifier model about a current input signal; obtaining, according to the amplifier model about the current input signal, a DPD model about the current input signal; and performing, according to the DPD model, digital pre-distortion correction on the current input signal. The present invention solves the problems of a more complicated obtaining process about model parameters and lower modeling efficiency, realizes simplification of the obtaining process about the model parameters, increases the effect of correction efficiency and is used for pre-distortion correction.

Description

technical field [0001] The present invention relates to the communication field, in particular to a digital predistortion correction method and device. Background technique [0002] A power amplifier is an important component of a transmitting device in a communication system. In communication systems, in order to meet the transmission requirements, power amplifiers need to operate at high efficiency while maintaining high linearity, and efficiency and linearity are often in conflict with each other in the design of power amplifiers. The digital pre-distortion (English: Digital Pre-Distortion; abbreviation: DPD) technology is a key technology specially for compensating the nonlinear characteristics of the power amplifier. This technology establishes a DPD model based on the characteristics of the power amplifier, and performs pre-distortion processing on the current input signal in the digital domain, so that the processed pre-distortion signal can offset the nonlinear char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/04
CPCH04B1/04
Inventor 肖宇翔朱尔霓尤览
Owner HUAWEI TECH CO LTD