The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
O pré-distortor adaptativo e o sistema de realimentação negativa são conhecidos como métodos para compensar a distorção não linear de um amplificador de potência. Embora o método de feedback seja uma técnica simples, sua instabilidade impede a capacidade do ganho de feedback alto de atingir um efeito de alta compensação. Por outro lado, o pré-distorcedor necessita de muito tempo para convergência dos pré-distorcedores adaptativos. Neste artigo, propomos um método de compensação de distorção não linear para um sinal de banda estreita. Neste método, um pré-distorção adaptativo e um feedback negativo são combinados. Além disso, para reduzir o tempo de convergência para minimizar a distorção não linear, um método de tamanho de passo variável (VS) também é aplicado ao algoritmo para determinar os parâmetros do pré-distorção adaptativo. Usando simulações de computador, mostramos que o esquema proposto atinge uma velocidade de convergência cinco vezes mais rápida que a do pré-distorcedor e um tempo de atraso permitido três vezes maior no amplificador de realimentação do que um amplificador somente de realimentação negativa.
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Yitao ZHANG, Osamu MUTA, Yoshihiko AKAIWA, "A Nonlinear Distortion Compensation Method with Adaptive Predistorter and Negative Feed-Back for a Narrow-Band Signal" in IEICE TRANSACTIONS on Communications,
vol. E91-B, no. 7, pp. 2331-2337, July 2008, doi: 10.1093/ietcom/e91-b.7.2331.
Abstract: The adaptive predistorter and the negative feedback system are known as methods to compensate for the nonlinear distortion of a power amplifier. Although the feedback method is a simple technique, its instability impedes the capability of high-feedback gain to achieve a high-compensation effect. On the other hand, the predistorter requires a long time for convergence of the adaptive predistorters. In this paper, we propose a nonlinear distortion compensation method for a narrow-band signal. In this method, an adaptive predistorter and negative feedback are combined. In addition, to shorten the convergence time to minimize nonlinear distortion, a variable step-size (VS) method is also applied to the algorithm to determine the parameters of the adaptive predistorter. Using computer simulations, we show that the proposed scheme achieves both five times faster convergence speed than that of the predistorter and three times higher permissible delay time in the feedback amplifier than that of a negative feedback only amplifier.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.7.2331/_p
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@ARTICLE{e91-b_7_2331,
author={Yitao ZHANG, Osamu MUTA, Yoshihiko AKAIWA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Nonlinear Distortion Compensation Method with Adaptive Predistorter and Negative Feed-Back for a Narrow-Band Signal},
year={2008},
volume={E91-B},
number={7},
pages={2331-2337},
abstract={The adaptive predistorter and the negative feedback system are known as methods to compensate for the nonlinear distortion of a power amplifier. Although the feedback method is a simple technique, its instability impedes the capability of high-feedback gain to achieve a high-compensation effect. On the other hand, the predistorter requires a long time for convergence of the adaptive predistorters. In this paper, we propose a nonlinear distortion compensation method for a narrow-band signal. In this method, an adaptive predistorter and negative feedback are combined. In addition, to shorten the convergence time to minimize nonlinear distortion, a variable step-size (VS) method is also applied to the algorithm to determine the parameters of the adaptive predistorter. Using computer simulations, we show that the proposed scheme achieves both five times faster convergence speed than that of the predistorter and three times higher permissible delay time in the feedback amplifier than that of a negative feedback only amplifier.},
keywords={},
doi={10.1093/ietcom/e91-b.7.2331},
ISSN={1745-1345},
month={July},}
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TY - JOUR
TI - A Nonlinear Distortion Compensation Method with Adaptive Predistorter and Negative Feed-Back for a Narrow-Band Signal
T2 - IEICE TRANSACTIONS on Communications
SP - 2331
EP - 2337
AU - Yitao ZHANG
AU - Osamu MUTA
AU - Yoshihiko AKAIWA
PY - 2008
DO - 10.1093/ietcom/e91-b.7.2331
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2008
AB - The adaptive predistorter and the negative feedback system are known as methods to compensate for the nonlinear distortion of a power amplifier. Although the feedback method is a simple technique, its instability impedes the capability of high-feedback gain to achieve a high-compensation effect. On the other hand, the predistorter requires a long time for convergence of the adaptive predistorters. In this paper, we propose a nonlinear distortion compensation method for a narrow-band signal. In this method, an adaptive predistorter and negative feedback are combined. In addition, to shorten the convergence time to minimize nonlinear distortion, a variable step-size (VS) method is also applied to the algorithm to determine the parameters of the adaptive predistorter. Using computer simulations, we show that the proposed scheme achieves both five times faster convergence speed than that of the predistorter and three times higher permissible delay time in the feedback amplifier than that of a negative feedback only amplifier.
ER -