An Average Power Tracking Method for Wideband Highly Nonlinear Power Amplifiers

Shitao Zhu; Anxue Zhang; Zhuo Xu; Xiaoli Dong

doi:10.1109/LMWC.2015.2400938

An Average Power Tracking Method for Wideband Highly Nonlinear Power Amplifiers

Shitao Zhu
, Anxue Zhang
, Zhuo Xu
, Xiaoli Dong

Faculty of Electronic and Information Engineering

Xi'an Jiaotong University
Xi'an Institute of Posts and Telecommunications

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

An accurate average power tracking method is presented to track and compensate the fluctuation of power amplifier (PA) output during updates of digital predistorter. Firstly, joint distortion probability distribution (JDPD) of the predistorter input signal and PA compression state is presented to extract the average power gain fluctuation related to the nonlinearity of the PA. The accurate PA compression state is extracted by linear-zone-reposition technique. Then, the average power gain fluctuation related to PA memory is obtained assisted by the predistortion model. The PA output power fluctuation is well controlled through the proposed method. Results from experiments show that the performance of DPD improves at least 3 dB for long time experiments when the proposed method is used for wideband highly nonlinear PA.

Original language	English
Article number	7058456
Pages (from-to)	274-276
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	25
Issue number	4
DOIs	https://doi.org/10.1109/LMWC.2015.2400938
State	Published - 1 Apr 2015

Keywords

Average power tracking
digital predistortion (DPD)
wideband highly nonlinear power amplifier

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10.1109/LMWC.2015.2400938

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title = "An Average Power Tracking Method for Wideband Highly Nonlinear Power Amplifiers",

abstract = "An accurate average power tracking method is presented to track and compensate the fluctuation of power amplifier (PA) output during updates of digital predistorter. Firstly, joint distortion probability distribution (JDPD) of the predistorter input signal and PA compression state is presented to extract the average power gain fluctuation related to the nonlinearity of the PA. The accurate PA compression state is extracted by linear-zone-reposition technique. Then, the average power gain fluctuation related to PA memory is obtained assisted by the predistortion model. The PA output power fluctuation is well controlled through the proposed method. Results from experiments show that the performance of DPD improves at least 3 dB for long time experiments when the proposed method is used for wideband highly nonlinear PA.",

keywords = "Average power tracking, digital predistortion (DPD), wideband highly nonlinear power amplifier",

author = "Shitao Zhu and Anxue Zhang and Zhuo Xu and Xiaoli Dong",

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T1 - An Average Power Tracking Method for Wideband Highly Nonlinear Power Amplifiers

AU - Zhu, Shitao

AU - Zhang, Anxue

AU - Xu, Zhuo

AU - Dong, Xiaoli

PY - 2015/4/1

Y1 - 2015/4/1

N2 - An accurate average power tracking method is presented to track and compensate the fluctuation of power amplifier (PA) output during updates of digital predistorter. Firstly, joint distortion probability distribution (JDPD) of the predistorter input signal and PA compression state is presented to extract the average power gain fluctuation related to the nonlinearity of the PA. The accurate PA compression state is extracted by linear-zone-reposition technique. Then, the average power gain fluctuation related to PA memory is obtained assisted by the predistortion model. The PA output power fluctuation is well controlled through the proposed method. Results from experiments show that the performance of DPD improves at least 3 dB for long time experiments when the proposed method is used for wideband highly nonlinear PA.

AB - An accurate average power tracking method is presented to track and compensate the fluctuation of power amplifier (PA) output during updates of digital predistorter. Firstly, joint distortion probability distribution (JDPD) of the predistorter input signal and PA compression state is presented to extract the average power gain fluctuation related to the nonlinearity of the PA. The accurate PA compression state is extracted by linear-zone-reposition technique. Then, the average power gain fluctuation related to PA memory is obtained assisted by the predistortion model. The PA output power fluctuation is well controlled through the proposed method. Results from experiments show that the performance of DPD improves at least 3 dB for long time experiments when the proposed method is used for wideband highly nonlinear PA.

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KW - digital predistortion (DPD)

KW - wideband highly nonlinear power amplifier

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JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

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M1 - 7058456

ER -

An Average Power Tracking Method for Wideband Highly Nonlinear Power Amplifiers

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