Direct learning predistorter with a new loop delay compensation algorithm

Zhengdai Li; Jingming Kuang; Nan Wu

doi:10.1109/VETECS.2012.6240163

Direct learning predistorter with a new loop delay compensation algorithm

Zhengdai Li
, Jingming Kuang
, Nan Wu^*

^*Corresponding author for this work

School of Integrated Circuits and Electronics

Dept. of Electronic Engineering
Beijing Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Digital baseband predistortion technology can effectively reduce the system nonlinear distortion. However, the predistortion algorithms based on indirect structure are sensitive to measurement noise and the traditional loop-delay estimation algorithms are vulnerable to the amplifier's nonlinear distortion especially in the amplifier saturation region. In this paper, we first present an adaptive nonlinear predistorter based on direct learning structure and then propose a new loop-delay estimation algorithm which applies to PA nonlinear distortion conditions by analyzing the relationship between the system loop-delay misalignment and the amplitude of HPA model identification error output. Simulation results show that the power spectral density (PSD) after the predistortion is very close to that of the ideal signal and a good NMSE performance is achieved.

Original language	English
Title of host publication	IEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)	9781467309905
DOIs	https://doi.org/10.1109/VETECS.2012.6240163
Publication status	Published - 2012
Event	75th IEEE Vehicular Technology Conference, VTC 2012-Spring - Yokohama, Japan Duration: 6 May 2012 → 9 Jun 2012

Publication series

Name	IEEE Vehicular Technology Conference
ISSN (Print)	1550-2252

Conference

Conference	75th IEEE Vehicular Technology Conference, VTC 2012-Spring
Country/Territory	Japan
City	Yokohama
Period	6/05/12 → 9/06/12

Keywords

Loop delay estimation
Nonlinearity
Predistorter
RLS algorithm

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10.1109/VETECS.2012.6240163

Cite this

@inproceedings{ae43fd6c6db2475bba6e1f179d69a2c5,

title = "Direct learning predistorter with a new loop delay compensation algorithm",

abstract = "Digital baseband predistortion technology can effectively reduce the system nonlinear distortion. However, the predistortion algorithms based on indirect structure are sensitive to measurement noise and the traditional loop-delay estimation algorithms are vulnerable to the amplifier's nonlinear distortion especially in the amplifier saturation region. In this paper, we first present an adaptive nonlinear predistorter based on direct learning structure and then propose a new loop-delay estimation algorithm which applies to PA nonlinear distortion conditions by analyzing the relationship between the system loop-delay misalignment and the amplitude of HPA model identification error output. Simulation results show that the power spectral density (PSD) after the predistortion is very close to that of the ideal signal and a good NMSE performance is achieved.",

keywords = "Loop delay estimation, Nonlinearity, Predistorter, RLS algorithm",

author = "Zhengdai Li and Jingming Kuang and Nan Wu",

year = "2012",

doi = "10.1109/VETECS.2012.6240163",

language = "English",

isbn = "9781467309905",

series = "IEEE Vehicular Technology Conference",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "IEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Proceedings",

address = "United States",

note = "75th IEEE Vehicular Technology Conference, VTC 2012-Spring ; Conference date: 06-05-2012 Through 09-06-2012",

}

Li, Z, Kuang, J & Wu, N 2012, Direct learning predistorter with a new loop delay compensation algorithm. in IEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Proceedings., 6240163, IEEE Vehicular Technology Conference, Institute of Electrical and Electronics Engineers Inc., 75th IEEE Vehicular Technology Conference, VTC 2012-Spring , Yokohama, Japan, 6/05/12. https://doi.org/10.1109/VETECS.2012.6240163

Direct learning predistorter with a new loop delay compensation algorithm. / Li, Zhengdai; Kuang, Jingming; Wu, Nan.
IEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2012. 6240163 (IEEE Vehicular Technology Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Direct learning predistorter with a new loop delay compensation algorithm

AU - Li, Zhengdai

AU - Kuang, Jingming

AU - Wu, Nan

PY - 2012

Y1 - 2012

N2 - Digital baseband predistortion technology can effectively reduce the system nonlinear distortion. However, the predistortion algorithms based on indirect structure are sensitive to measurement noise and the traditional loop-delay estimation algorithms are vulnerable to the amplifier's nonlinear distortion especially in the amplifier saturation region. In this paper, we first present an adaptive nonlinear predistorter based on direct learning structure and then propose a new loop-delay estimation algorithm which applies to PA nonlinear distortion conditions by analyzing the relationship between the system loop-delay misalignment and the amplitude of HPA model identification error output. Simulation results show that the power spectral density (PSD) after the predistortion is very close to that of the ideal signal and a good NMSE performance is achieved.

AB - Digital baseband predistortion technology can effectively reduce the system nonlinear distortion. However, the predistortion algorithms based on indirect structure are sensitive to measurement noise and the traditional loop-delay estimation algorithms are vulnerable to the amplifier's nonlinear distortion especially in the amplifier saturation region. In this paper, we first present an adaptive nonlinear predistorter based on direct learning structure and then propose a new loop-delay estimation algorithm which applies to PA nonlinear distortion conditions by analyzing the relationship between the system loop-delay misalignment and the amplitude of HPA model identification error output. Simulation results show that the power spectral density (PSD) after the predistortion is very close to that of the ideal signal and a good NMSE performance is achieved.

KW - Loop delay estimation

KW - Nonlinearity

KW - Predistorter

KW - RLS algorithm

UR - https://www.scopus.com/pages/publications/84865013290

U2 - 10.1109/VETECS.2012.6240163

DO - 10.1109/VETECS.2012.6240163

M3 - Conference contribution

AN - SCOPUS:84865013290

SN - 9781467309905

T3 - IEEE Vehicular Technology Conference

BT - IEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 75th IEEE Vehicular Technology Conference, VTC 2012-Spring

Y2 - 6 May 2012 through 9 June 2012

ER -

Direct learning predistorter with a new loop delay compensation algorithm

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Keywords

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