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Digital predistortion system and method for millimeter wave broadband power amplifier

A technology of digital pre-distortion and power amplifier, which is applied to power amplifiers and improved amplifiers to reduce nonlinear distortion, etc. It can solve the problems of unaffordable resource consumption of digital pre-distortion, achieve good linearization effect, broad prospects, and reduce the burden of implementation Effect

Active Publication Date: 2020-07-14
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The bandwidth requirements of the above aspects are shown in Table 1. It is not difficult to see that with the increase of bandwidth, the resource consumption of digital pre-distortion will become more and more unaffordable

Method used

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  • Digital predistortion system and method for millimeter wave broadband power amplifier
  • Digital predistortion system and method for millimeter wave broadband power amplifier
  • Digital predistortion system and method for millimeter wave broadband power amplifier

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Embodiment Construction

[0055] The technical solution of the present invention will be further introduced below in conjunction with specific embodiments and drawings.

[0056] This specific embodiment discloses a digital predistortion system for a millimeter wave broadband power amplifier, such as figure 1 Shown, including:

[0057] Digital predistortion module: used to generate baseband input signal;

[0058] Digital-to-analog converter: used to convert the baseband input signal generated by the digital predistortion module into an analog signal;

[0059] Upconverter: used to upconvert the analog signal output by the digital-to-analog converter, and modulate the analog signal to the RF range required by the power amplifier;

[0060] Power amplifier: used to amplify and output the signal output by the up-converter;

[0061] Feedback loop: used to feed back the output signal of the power amplifier to the analog-to-digital converter;

[0062] Analog-to-digital converter: used to perform analog-to-digital conversio...

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Abstract

The invention discloses a digital predistortion system of a millimeter wave wideband power amplifier. The digital predistortion system comprises a digital predistortion module, a digital-to-analog converter, an up-converter, a power amplifier, a feedback loop, an analog-to-digital converter and a model extraction module. The invention also discloses a digital predistortion method of a millimeter wave wideband power amplifier. Through adoption of the digital predistortion system and method, linearization of a millimeter wave power amplifier excited with a large bandwidth signal is realized by avery limited digital signal processing rate; a good linearization effect is achieved; and the implementation burden of a digital signal processing module is lowered. The digital predistortion systemand method have broad prospects in 5G millimeter wave application.

Description

Technical field [0001] The present invention relates to a digital predistortion system, in particular to a digital predistortion system and method of a millimeter wave broadband power amplifier. Background technique [0002] Whether in academia or industry, the 5th generation mobile communication system (5G) is getting more and more attention. The ultimate goal of 5G is to support a transmission rate of 10 gigabits per second (Gbps). In this context, the millimeter wave frequency band has become one of the promising 5G frequency planning schemes. Many countries have successively released the 28GHz and 40GHz frequency bands. The draft of millimeter wave spectrum resource allocation. With the popularization of millimeter wave technology, high-speed signal transmission systems will have the ability to accommodate ultra-wideband modulated signals (for example, a signal bandwidth of 500 MHz). However, the sharp increase in signal bandwidth will bring great pressure to the design of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F3/24
Inventor 余超陆倩云
Owner SOUTHEAST UNIV
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