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System and method for improving short-wave digital pre-distortion performance

A digital pre-distortion and pre-distortion technology, which is applied in the direction of improving amplifiers to reduce nonlinear distortion, synchronization/start-stop systems, components of amplifiers, etc., can solve the problems of low linearity of radio frequency power amplifiers and low efficiency of power amplifiers, and achieve improved Linearity and power amplifier efficiency, the effect of improving performance

Pending Publication Date: 2020-04-24
西安烽火电子科技有限责任公司
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Problems solved by technology

The characteristics of the power amplifier will vary with the characteristics of the input signal. The existing memory polynomial model cannot accurately characterize the essential characteristics of the power amplifier, which leads to low linearity and power amplifier efficiency of the RF power amplifier.

Method used

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  • System and method for improving short-wave digital pre-distortion performance
  • System and method for improving short-wave digital pre-distortion performance
  • System and method for improving short-wave digital pre-distortion performance

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Embodiment Construction

[0058] Embodiments of the present invention will be described in detail below in conjunction with examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention.

[0059] (1) Reference image 3 , a system for improving shortwave digital predistortion performance, comprising: a first analog-to-digital converter, an algorithm core module, a digital channel module, and a power amplifier;

[0060] Wherein, the algorithm core module includes a digital predistorter and a predistortion parameter extraction module; the digital channel module includes a digital up-converter, a digital-to-analog converter, a second analog-to-digital converter, and a digital down-converter;

[0061] The signal output end of the first analog-to-digital converter is electrically connected to the first signal input end of the digital predistorter, and the first s...

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Abstract

The invention belongs to the technical field of adaptive digital pre-distortion and discloses a system and a method for improving short-wave digital pre-distortion performance. For the characteristicof narrow bandwidth of short-wave signals, a weak nonlinear filter of an FIR filter is integrated to overcome a memory effect, and a memory polynomial model is integrated, so that pre-distortion parameter extraction can be carried out with higher integrating degree, parameters more conforming to actual characteristics of the power amplifier are obtained, the performance of a digital pre-distortionsystem is improved, and the linearity and the power amplifier efficiency of the radio frequency power amplifier are improved.

Description

technical field [0001] The invention relates to the technical field of adaptive digital pre-distortion, in particular to a system and method for improving the performance of short-wave digital pre-distortion, which are used to improve the linearity and power amplifier efficiency of radio frequency power amplifiers. Background technique [0002] In today's increasingly tight spectrum resources, modern communication systems tend to adopt non-constant envelope linear modulation with higher spectral efficiency than constant envelope modulation, and this modulation has higher linearity requirements for high-power amplifiers. High, so the use of this modulation method requires the use of linearization technology to improve the linearity of the power amplifier. On the other hand, with the development of digital mobile communication technology, higher and higher requirements are put forward for the performance of the power amplifier of the base station, that is, under the premise of...

Claims

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Application Information

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IPC IPC(8): H03F3/24H03F3/189H03F1/32H03F1/02H04L25/49
CPCH03F3/24H03F1/02H03F1/3241H03F3/189H04L25/49Y02D30/70
Inventor 任继军王小军刘琪赵勇
Owner 西安烽火电子科技有限责任公司
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