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In-band and out-of-band joint digital predistortion system and method for wideband radio frequency power amplifier

A technology of digital pre-distortion and radio frequency power, applied in power amplifiers, improved amplifiers to reduce nonlinear distortion, high-frequency amplifiers, etc., to achieve the effect of feasible system design, low cost, and reduced bandwidth

Active Publication Date: 2021-09-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: the purpose of the present invention is to provide a system and method for combined in-band and out-of-band digital predistortion for broadband radio frequency power amplifiers, which can solve the problem of linearization of the full frequency band of broadband radio frequency power amplifiers

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  • In-band and out-of-band joint digital predistortion system and method for wideband radio frequency power amplifier
  • In-band and out-of-band joint digital predistortion system and method for wideband radio frequency power amplifier
  • In-band and out-of-band joint digital predistortion system and method for wideband radio frequency power amplifier

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Embodiment Construction

[0043] The technical solution of the present invention will be further introduced below in combination with specific embodiments.

[0044] This specific embodiment discloses a combined in-band and out-of-band digital predistortion system for broadband radio frequency power amplifiers, such as figure 1 As shown, it includes an in-band digital pre-distortion module, the input signal passes through the in-band digital pre-distortion module to generate an in-band pre-distortion signal, and the in-band pre-distortion signal is sent to an input end of the first adder, and the output end of the first adder The output signal passes through the digital-to-analog converter, modulator, up-converter and power amplifier in turn to generate an output signal that eliminates nonlinear distortion within the specified frequency band, and the output signal passes through the filter, down-converter, demodulator and analog in turn. Digital converter; the local oscillator signal during down-convers...

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Abstract

The invention discloses a combined in-band and out-of-band digital pre-distortion system for broadband radio frequency power amplifiers, including an in-band digital pre-distortion module, a first adder, a digital-to-analog converter, a modulator, an up-converter, and a power amplifier , filter, downconverter, demodulator, analog-to-digital converter, in-band coefficient extraction module, first signal decomposition module, first sideband coefficient extraction module, second sideband coefficient extraction module, first sideband generation module, a second sideband generation module, a second signal decomposition module and a second adder. The invention also discloses an in-band and out-band combined digital pre-distortion method for the wideband radio frequency power amplifier. The invention combines the in-band digital pre-distortion technology and the sideband suppression technology, solves the problem that the in-band digital pre-distortion technology cannot linearize the whole frequency band, and can realize the linearization of the whole frequency band at a lower cost.

Description

technical field [0001] The invention relates to the technical field of digital pre-distortion, in particular to an in-band and out-of-band combined digital pre-distortion system and method for wideband radio frequency power amplifiers. Background technique [0002] In the upcoming fifth-generation mobile communication (5G) era, high-speed wireless data transmission will be applied to all aspects of life, such as 8K video streaming, driverless car driving, etc. However, in order to support such a high rate of propagation, a large data transmission bandwidth is required, for example, a modulation bandwidth of 500MHz will become the basic configuration of the 5G system. Similar to the dilemma faced by the current mobile communication system, the 5G system will also face the contradiction between the working efficiency and linearization of the RF power amplifier. In order to ensure the working efficiency of the system, the RF power amplifier must work in the nonlinear region, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F3/19H03F3/21
CPCH03F1/3247H03F3/19H03F3/21
Inventor 余超杨吶
Owner SOUTHEAST UNIV