Method for modeling wideband radio-frequency power amplifier

A radio frequency power and amplifier technology, applied in the field of broadband radio frequency power amplifier modeling, can solve problems such as insufficient research on broadband radio frequency PA models

Inactive Publication Date: 2009-01-21
BEIJING NORTHEN FIBERHOME TECH CO LTD
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Problems solved by technology

[0014] At present, the research focus of power amplifier modeling technology is gradually shifting to the wideband RF PA model with memory. The research on the wideband RF PA model is not enough, especially the accurate description of the RF PA model with a bandwidth of 100MHZ is rare.

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  • Method for modeling wideband radio-frequency power amplifier

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[0052] Such as figure 1 Shown is a block diagram of the principle structure of the modeling method of the present invention. Let the actual output of the power amplifier be y pa (n), the output of the memoryless nonlinear nominal model is y a (n), in the face of the wide bandwidth transmission of the next generation mobile communication system, the memory effect of the wideband radio frequency PA will become more obvious, y pa (n) and y a (n) Generally inconsistent. The method of the invention combines the non-memory nonlinear nominal model and the memory nonlinear identification model in parallel to realize the modeling of PA. The output of the memory nonlinear identification model is y b (n), the output of the parallel identification model of memory nonlinear identification model and memoryless nonlinear nominal model is y(n), then

[0053] y(n)=y a (n)+y b (n) (1)

[0054] Identify the parameters in the memory nonlinear identification model, and continuously adjust...

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Abstract

The present invention relates to a modeling method of broadband radio frequency power amplifier. In the method, a memory-free non-linear nominal model is connected with a memory non-linear identification model in parallel so as to realize the modeling of the power amplifier PA. The modeling method makes full use of the prior knowledge of the PA, and adopts the mixed modeling idea which combines the traditional memory-free non-linear nominal model and the memory non-linear identification model, realizes the modeling of the broadband radio frequency PA, and greatly improves the performance of the whole PA model.

Description

technical field [0001] The invention relates to the technical field of radio frequency power amplifier modeling in a wireless communication system, in particular to a modeling method for a wideband radio frequency power amplifier. Background technique [0002] With the rapid development of wireless communication technology, communication systems such as IEEE 802.16, 3GPP LTE (Long Term Evolution, Long Term Evolution) and the last three generations (IMT-Advanced) are all moving towards broadband and Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, namely OFDM) technology, Multiple-Input and Multiple-Output (Multiple-Input Multiple-Output, MIMO) technology and high-frequency technology evolution. Aiming at the high peak-to-average power ratio (Peak-to-Average Power Ratio, or PAPR) problem of OFDM technology, how to improve the linearity of the power amplifier (Power Amplifier, that is, PA), many power amplifier linearization techniques ha...

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Application Information

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IPC IPC(8): H03F1/32G06F17/50
Inventor 王建新简伟刘广才余建国朱宇霞
Owner BEIJING NORTHEN FIBERHOME TECH CO LTD
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