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Non-linear system distortion correction apparatus and method

A nonlinear system and distortion correction technology, applied in the field of communication, can solve problems such as poor system robustness, achieve the effect of improving robustness and meeting the requirements of frequency band configuration

Active Publication Date: 2016-01-06
ZTE CORP
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a nonlinear system distortion correction device and method to solve the problem of poor robustness of the prior art system

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  • Non-linear system distortion correction apparatus and method

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Embodiment Construction

[0070] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0071] The present invention proposes a general-purpose device and method for improving the robustness of a system using power amplifier linearization technology, and adopts a method of adding a robust signal source to a conventional pre-distortion self-iterative system to participate in the extraction of linearization coefficients to solve the problem of cross-band ultra-wideband In the predistortion system, under some configurations, the predistortion module causes the output power of the system to be unstable, which may cause damage to the power amplifier and abnormal signal spectrum.

[0072] Such as figure 1 As shown, the embodiment of the present invention relates to a nonlinear system ...

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Abstract

The invention discloses a non-linear system distortion correction apparatus and method. The apparatus comprises a robustness signal source generator which is used for generating a robustness signal provided to an adaptive device, the adaptive device which is used for collecting a main link signal output by a signal generator and a feedback signal returned by the main link signal via a feedback link and for generating a correction parameter according to the main link signal, a feedback signal and the robustness signal, and a precorrection device which is used for precorrecting the main link signal output by the signal generator according to the correction parameter. By providing the robustness signal, a fact is ensured that under various dynamic configuration conditions, a system cannot cause a problem of unknowable power sudden change or abnormal frequency spectrum output after a practical link signal passes through a predistortion module as the signal feature difference between a former configuration and a later configuration is over large, so that the robustness of the system under dynamic operation conditions is improved, and configuration requirements for various frequency ranges of operators and telephone traffic dynamic change requirements in different areas can be met.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a nonlinear system distortion correction device and method. Background technique [0002] With the development of mobile communications, spectrum resources are becoming increasingly scarce, and it is often difficult for operators to obtain spectrum with sufficient bandwidth in a frequency band. In the future, various operators will establish cross-band communication systems more and more frequently. This will cause the communication equipment system to process ultra-wideband signals across frequency bands. At the same time, the operator's requirements for CAPEX (Capital Expenditure, capital expenditure) and OPEX (Operating Expense, operating cost) will increasingly become the primary consideration when selecting equipment. For wireless communication base station systems, about 80% of the power consumption is generated by the radio frequency power amplifier (PA, Power Amp...

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Application Information

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IPC IPC(8): H04L25/03H04L25/49H03F1/32H03F3/24
CPCH04B1/0475H03F3/24H04B2001/0408H04B2001/0433H04B2001/0491H04L25/03057
Inventor 王蕾戴征坚潘卫明张哲黄梅
Owner ZTE CORP
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