Self-adaptive digital pre-distortion system based on reference signal and initialization correction method

A digital pre-distortion and reference signal technology, applied in the field of wireless communication, to achieve the effect of ensuring pre-distortion processing and accurately tracking nonlinear changes

Inactive Publication Date: 2013-08-14
SHANGHAI RES CENT FOR WIRELESS COMM +1
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Problems solved by technology

[0008] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a reference signal-based adaptive digital pre-distortion system and an initialization correction method, which solves the blind spot problem of the traditional pre-distortion system, and can accurately track the power amplifier Non-linear variation and guaranteed predistortion for all transmitted signals

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  • Self-adaptive digital pre-distortion system based on reference signal and initialization correction method

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[0057] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention

[0058] The nonlinearity of RF power amplifiers is affected by many factors, such as: environmental changes, mainly temperature; operating time, that is, aging effects; input signal size, that is, changes in the amplification interval; signal frequency bands, that is, the non-linearity of power amplifiers in different frequency bands. The linearity is not the same; the signal format, that is, the inconsistency of the statistical characteristics of the signal, et...

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Abstract

The invention provides a self-adaptive digital pre-distortion system based on a reference signal and an initialization correction method. A series of pre-distortion initialization parameters are obtained through introducing a reference signal generator module to a numeric field and carrying out initialization training on the pre-distortion system based on the reference signal; and when the non-linear change of a power amplifier triggers a correction enabling signal, the pre-distortion system is corrected based on the reference signal to obtain a corresponding pre-distortion parameter. The blind spot problem of the traditional pre-distortion system is solved, the non-linear change of the power amplifier can be precisely tracked, all transmission signals are guaranteed to be subjected to pre-distortion processing, and the reference signal is higher in flexibility in format, in length and in frequency band.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an adaptive digital pre-distortion system and an initialization correction method based on a reference signal. Background technique [0002] With the rapid development and popularization of wireless communication networks, the overall energy consumption of wireless communication services is increasing rapidly, and the situation of energy saving and emission reduction in the wireless communication industry is severe. Comprehensively analyzing the energy consumption distribution of wireless communication equipment, the radio frequency power amplifier (Radio Frequency Power Amplifier, RF PA) consumes most of the energy of wireless equipment. However, the higher the power efficiency of the power amplifier, the more obvious its nonlinear characteristics, and the worse the quality of the amplified signal, which will lead to serious in-band distortion and out-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49
Inventor 黄浩钱骅姚赛杰王晓涛
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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