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Digital pre-distortion processing method for high-efficiency power amplifier

A technology of digital pre-distortion and power amplifier, which is applied in the direction of power amplifier and improved amplifier to reduce nonlinear distortion, etc., to achieve the effect of overcoming jitter, wide application range and improving output linearity

Inactive Publication Date: 2012-04-11
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it ignores the influence of the jitter of the two input signals on the output linearity of the power amplifier.

Method used

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  • Digital pre-distortion processing method for high-efficiency power amplifier
  • Digital pre-distortion processing method for high-efficiency power amplifier
  • Digital pre-distortion processing method for high-efficiency power amplifier

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Embodiment Construction

[0016] The invention discloses a digital pre-distortion processing method for high-efficiency power amplifiers, which is suitable for linearized power amplifiers in digital pre-distortion technology, and will be described in detail below with reference to the accompanying drawings.

[0017] figure 2 It is an embodiment of the structural expression of a digital pre-distortion processing method for high-efficiency power amplifiers of the present invention, including a digital pre-distortion unit (1), a signal synchronization unit (2) and a digital pre-distortion training unit (4), and the digital pre-distortion Unit (1) has an external signal input terminal, a model parameter signal input terminal and an output terminal, and the signal synchronization unit (2) has an external amplified signal input terminal, a pre-distortion signal input terminal and a synchronized external amplified signal Output terminal and a synchronous predistortion signal output terminal, the digital pred...

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Abstract

The invention discloses a digital pre-distortion processing method for a high-efficiency power amplifier, which is characterized in that a digital filter unit 3 is additionally arranged between a signal synchronization unit 2 and a digital pre-distortion training unit 4. The specific implementation scheme is as follows: an output signal of a digital pre-distorter and a feedback signal of the power amplifier are subjected to signal synchronization firstly, then two paths of synchronized signals are transmitted to a digital pre-distortion trainer, two paths of data are filtered, and finally filtered data is input to the digital pre-distortion trainer to be used for training pre-distortion model parameters. Signals subjected to digital filtration effectively overcomes the jittering problem of the input signal, thus output linearity of the power amplifier is increased. The digital pre-distortion processing method is simple in realizing and easy to operate.

Description

technical field [0001] The invention relates to a digital pre-distortion processing technology for high-efficiency power amplifiers, in particular to a data filtering method for a digital pre-distortion system. Background technique [0002] With the rapid development of modern wireless communication technology, the power amplifier, as the most important device affecting the performance of the communication system, its nonlinear characteristics and memory effect have attracted more and more attention from the industry. [0003] The nonlinearity of the power amplifier means that when the amplitude of the input signal of the amplifier gradually increases, the output signal will reach a saturated state, and the input and output present a nonlinear relationship, including amplitude nonlinearity, phase nonlinearity and intermodulation distortion. The adverse consequences of nonlinearity are mainly manifested in: (1) in-band signal distortion, which increases the bit error rate of ...

Claims

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Application Information

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IPC IPC(8): H03F1/32H03F3/20
Inventor 余萍潘文生符初生唐友喜
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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