Dynamic Linearization System and Method of Power Amplifier Based on Pattern Recognition

A technology of power amplifier and pattern recognition, which is applied in the field of linearization system, can solve the problems of power amplifier complexity and change, and achieve the effect of good linearization performance

Active Publication Date: 2022-03-29
SOUTHEAST UNIV
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Problems solved by technology

[0003] However, due to the very complex characteristics of power amplifiers, the traditional dynamic linearization methods based only on power indicators have some shortcomings, which is reflected in that even at a fixed input signal power level, the state of the power amplifier will change Variation due to many other non-power changes, e.g. thermal effects

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  • Dynamic Linearization System and Method of Power Amplifier Based on Pattern Recognition
  • Dynamic Linearization System and Method of Power Amplifier Based on Pattern Recognition
  • Dynamic Linearization System and Method of Power Amplifier Based on Pattern Recognition

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Embodiment Construction

[0060] The technical solution of the present invention will be further introduced below in combination with specific embodiments.

[0061] This specific embodiment discloses a dynamic linearization system of a power amplifier based on pattern recognition, such as figure 1 shown, including:

[0062] Eigenvector generating module: used to generate an eigenvector representing the current state of the power amplifier;

[0063] Multi-layer perceptron module: perform pattern recognition on the eigenvector of the power amplifier, and obtain the pattern recognition result of the current state of the power amplifier;

[0064] Predistortion coefficient lookup table module: according to the identification result of the multi-layer perceptron, the index corresponds to the predistortion coefficient of the current state of the power amplifier, and generates a predistortion signal corresponding to the current state of the power amplifier;

[0065] Vector signal module: used to generate the...

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Abstract

The invention discloses a power amplifier dynamic linearization system based on pattern recognition, which includes a feature vector generation module, a multilayer perceptron module, a predistortion coefficient lookup table module, a vector signal module, a transmission link module, a power amplifier module and a feedback loop module. The invention also discloses a method using it. The present invention adopts a new standard, that is, the mode of amplitude modulation to amplitude modulation (AM / AM) to identify the working state of the power amplifier, and uses the recognition result of the power amplifier AM / AM by the multilayer perceptron neural network to index different The pre-distortion coefficient realizes the dynamic linearization of the power amplifier. Compared with traditional power look-up table and power index algorithms, this method can provide better linearization performance. In addition, the present invention can also solve the linearization problem in the dynamic situation of the power amplifier caused by many other non-power factor changes such as temperature, frequency, bandwidth and signal type.

Description

technical field [0001] The invention relates to a linearization system and method of a power amplifier, in particular to a dynamic linearization system and method of a power amplifier based on pattern recognition. Background technique [0002] In the fifth generation wireless communication system (5G), dynamic power transfer technology will be widely used to achieve efficient utilization of power resources. As a key component in the 5G system, the power amplifier will not only have static in-band distortion and out-of-band distortion in traditional systems, but also have dynamic state changes caused by dynamic changes in input signal power. This inevitably affects the quality of the demodulated signal. The traditional digital pre-distortion technology is a common technology used to eliminate the static non-linear distortion of the power amplifier and maintain its high efficiency. However, this scenario of dynamic power transfer brings new challenges to the PA linearization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/24H03F1/30G06N3/04G06K9/62
CPCH03F1/30H03F3/24G06N3/045G06F18/214
Inventor 余超印航
Owner SOUTHEAST UNIV
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