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A digital predistortion method and device

A digital pre-distortion and pre-distortion technology, applied in the field of communications, can solve the problem of insufficient digital pre-distortion processing accuracy, and achieve the effects of improving linearity, performance and accuracy.

Active Publication Date: 2017-02-08
ZTE CORP
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  • Claims
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Problems solved by technology

[0006] The present invention provides a digital pre-distortion method and device to solve the problem of insufficient digital pre-distortion processing precision in the prior art

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  • A digital predistortion method and device
  • A digital predistortion method and device
  • A digital predistortion method and device

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Embodiment Construction

[0037] 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.

[0038] method embodiment

[0039] According to an embodiment of the present invention, a digital predistortion method is provided, figure 1 is a flow chart of the digital predistortion method of the embodiment of the present invention, such as figure 1 As shown, the digital predistortion method of the embodiment of the present invention includes the following processing:

[0040] Step 101, collecting digital feedback signals after digital predistortion processing;

[0041] Step 102, making a difference between the digital feedback signal and the signal before predistortion (ie, the forward signal) to obtain an error signal;

[0042] Step 103, the error signal and the signal before pre-dist...

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Abstract

A digital predistortion method. The method comprises: collecting a digital feedback signal; differentiating between the digital feedback signal and a prior to predistortion signal to acquire an error signal, iterative converging according to an adaptive algorithm the error signal and the prior to predistortion signal to acquire a correction value of a predistortion correction factor; correcting the predistortion factor on the basis of the correction value, acquiring a new predistortion correction factor, and using the new predistortion correction factor to perform a digital predistortion process. This is performed on the basis of having the prior to predistortion signal segmented according to power or amplitude. Also a digital predistortion device comprising: a feedback signal collection module (301), a correction value acquisition module (302), a correction factor correction module (303), and a segmentation module (304).

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a DPD (Digital Predistortion, digital predistortion) method and device. Background technique [0002] With the rapid development of mobile communication, wireless communication frequency bands are becoming more and more crowded, and frequency band resources are becoming increasingly tight. In order to change this situation and accommodate more communication channels within a limited spectrum range, it is necessary to increase the frequency spectrum of existing frequency bands. For this reason, people have applied many new broadband digital transmission technologies, such as multi-carrier GSM (Global System of Mobilecommunication, Global System for Mobile Communications), OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) and WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access) and high s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/49
CPCH03F3/24H03F1/3247H03F1/3258H03F3/189H03F2201/3233H04L25/03343
Inventor 张烈戴征坚游爱民
Owner ZTE CORP
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