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A kind of adaptive predistortion processing method and device

A pre-distortion processing and self-adaptive technology, applied in the direction of improving amplifiers to reduce nonlinear distortion, etc., can solve the problems of poor DPD cancellation effect and poor system communication quality, and achieve the effect of good cancellation effect and improved communication quality.

Active Publication Date: 2017-03-22
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

[0004] The embodiment of the present invention provides an adaptive pre-distortion processing method and device to solve the existing problems of poor DPD cancellation effect and poor system communication quality caused by using a single power amplifier model for DPD processing on input signals

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  • A kind of adaptive predistortion processing method and device
  • A kind of adaptive predistortion processing method and device
  • A kind of adaptive predistortion processing method and device

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Embodiment Construction

[0016] Based on the existing pre-distortion technology, using a single power amplifier model to perform DPD processing on the input signal results in poor DPD cancellation effect and poor system communication quality. The embodiment of the present invention provides an adaptive pre-distortion processing method and device, which can select a suitable power amplifier model for the input signal by calculating the signal bandwidth of the input signal, and switch the input signal to this model for pre-distortion processing , so that the cancellation effect of the DPD is better, so that the communication quality of the communication system can be improved.

[0017] The specific implementation manners of an adaptive pre-distortion processing method and device provided in the embodiments of the present invention will be described below with reference to the drawings in the description.

[0018] An adaptive pre-distortion processing method provided by an embodiment of the present inven...

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Abstract

The invention provides a self-adaptive pre-distortion processing method and device. The method includes that an input signal and a power amplification signal which corresponds to the input signal within a set period are obtained, the signal bandwidth of the obtained input signal is calculated, a preset power amplification model which is matched with the signal bandwidth is determined according to the calculated signal bandwidth and a corresponding relation between a preset signal bandwidth range and the preset power amplification model, and the input signal is switched to the determined preset power amplification model to be subjected to pre-distortion processing. According to the self-adaptive pre-distortion processing method and device, the signal bandwidth of the input signal is calculated, the proper power amplification model is selected for the signal bandwidth, finally, the input signal is switched to the power amplification model to be subjected to pre-distortion processing, by means of the processing method, digital pre-distortion (DPD) cancellation effect is good, and thereby, communication qualities of a communication system can be improved.

Description

technical field [0001] The present invention relates to the technical field of digital pre-distortion, in particular to an adaptive pre-distortion processing method and device. Background technique [0002] At present, the non-linear distortion problem caused by the power amplifier in the communication system has attracted more and more attention, especially the modern communication technology is multi-carrier signal communication, which increases the peak-to-average ratio of the signal, and the peak-to-average ratio will decrease Power amplifier efficiency, in this way, when the input signal of the device (such as a remote machine) is very large, it is often easy to pass through the power amplifier to make it enter the saturation region or cut-off region, resulting in serious nonlinear distortion. For this phenomenon, the current practical application Usually, the power back-off method is used to ensure the linearity of the power amplifier. Although this method is relativel...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32
Inventor 唐永军刘志
Owner COMBA TELECOM SYST CHINA LTD