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Power amplifier behavior modeling method based on two-stage open-loop structure and binary function unit

A power amplifier and meta-function technology, which is applied in power amplifiers, complex mathematical operations, CAD circuit design, etc., can solve the problems of inconvenient mobile terminals and high-frequency systems

Active Publication Date: 2020-06-12
PEKING UNIV
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Problems solved by technology

However, the closed-loop PA model requires an additional feedback path to return real-time samples of the PA output, which makes the implementation of digital predistortion techniques using the closed-loop model inconvenient for mobile terminals and high-frequency systems
In addition, the current memory model of the power amplifier is generally a unitary function unit. The essence of the unitary function unit is that the input value at different times independently affects the output value, and the correlation of the input value at different times also has an impact on the output value of the power amplifier. This effects that are not considered by currently existing power amplifier modeling methods

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  • Power amplifier behavior modeling method based on two-stage open-loop structure and binary function unit
  • Power amplifier behavior modeling method based on two-stage open-loop structure and binary function unit
  • Power amplifier behavior modeling method based on two-stage open-loop structure and binary function unit

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Embodiment Construction

[0037] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

[0038] This embodiment discloses a power amplifier behavior modeling method based on a two-stage open-loop structure and a binary function unit to construct a power amplifier model. use as figure 1 The test structure shown is used to test the power amplifier. The data used for model extraction and validation are measured from a 2.15GHZ, 170W laterally diffused metal oxide semiconductor (LDMOS) power amplifier, and the test signal uses the 3G wideband code division multiple access specification (WCDMA). The modeling method as figure 2 As shown, the specific description is as follows.

[0039] Step 1): Collect the input signal data vector x of the power amplifier in =[x in (1), x in (2),x in (3),...,x in (N)] and the output signal data vector y out =[...

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Abstract

The invention provides a power amplifier behavior modeling method based on a two-stage open-loop structure and a binary function unit, and relates to the technical field of nonlinear system modeling and analysis application. According to the method, a two-stage open-loop structure and a two-stage function unit are utilized; modeling of the nonlinear power amplifier with the memory effect can be completed only through few parameters and no feedback path. Good modeling precision is provided for in-band distortion and frequency spectrum regeneration, and by improving the modeling precision of thepower amplifier, interference of nonlinear noise in a system comprising a power amplifier circuit on the system is reduced.

Description

technical field [0001] The invention relates to the technical field of nonlinear system modeling and analysis applications, in particular to a power amplifier behavior modeling method based on a two-stage open-loop structure and a binary function unit. Background technique [0002] The power amplifier is an important module of the transmitter and is a complex nonlinear system. In order to make the power amplifier work with high efficiency, the transistors in the power amplifier mostly work in the near-saturation region or even the cut-off region, so the power amplifier often produces serious nonlinear distortion, and because of the influence of the equivalent reactance of the device, the power amplifier will produce memory effect. [0003] The digital predistortion module can effectively remove the non-linearity of the power amplifier and the system with a low-cost and high-precision method, and therefore becomes an indispensable part of modern wireless transmitters. In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/36G06F17/15H03F3/20
CPCG06F17/15H03F3/20
Inventor 雷易鸣
Owner PEKING UNIV
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