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".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Ao confirmar o ACLR (relação de potência de vazamento de canal adjacente), que são indicadores representativos de distorção no projeto do PA (amplificador de potência), é bem conhecido como calcular as características AM-AM/PM do PA, dados de série temporal de entrada de sinais modulados e analisar a saída por análise de Fourier. Nos telefones celulares 5G (5ª geração), não apenas a modulação QPSK (chaveamento de mudança de fase em quadratura), mas também 16QAM (modulação em quadratura), 64QAM e 256QAM estão se tornando mais multivalorados como sinais de modulação. Além disso, a banda de modulação pode exceder 100 MHz, e a quantidade de dados da série temporal aumenta, e o aumento no tempo de cálculo torna-se um problema. Para reduzir o tempo de cálculo, considera-se o cálculo da quantidade total de distorção gerada pelo PA a partir da densidade de probabilidade do sinal de modulação e das características AM (modulação de amplitude) -AM/PM (modulação de fase) do PA. Para as características AM-AM do PA, neste artigo, são comparados o IMD3 (distorção de intermodulação 3) obtido a partir da densidade de probabilidade e o IMD3 pela análise de Fourier, que são frequentemente utilizados por tanto tempo. Como resultado, confirmou-se que o resultado da análise de densidade de probabilidade é semelhante ao da análise de Fourier, quando a não linearidade é um tanto pequena. Além disso, a concordância entre o método proposto e o método convencional foi confirmada com um erro de cerca de 2.0dB de ACLR utilizando as ondas de modulação com largura de banda de 5MHz, sendo RB (bloco de recursos) 25, e modulação QPSK.
Satoshi TANAKA
Murata Manufacturing Co., Ltd.
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Satoshi TANAKA, "Distortion Analysis of RF Power Amplifier Using Probability Density of Input Signal and AM-AM Characteristics" in IEICE TRANSACTIONS on Fundamentals,
vol. E105-A, no. 11, pp. 1436-1442, November 2022, doi: 10.1587/transfun.2021KEP0004.
Abstract: When confirming the ACLR (adjacent channel leakage power ratio), which are representative indicators of distortion in the design of PA (power amplifier), it is well known how to calculate the AM-AM/PM characteristics of PA, input time series data of modulated signals, and analyze the output by Fourier analysis. In 5G (5th generation) mobile phones, not only QPSK (quadrature phase shift keying) modulation but also 16QAM (quadrature modulation), 64QAM, and 256QAM are becoming more multivalued as modulation signals. In addition, the modulation band may exceed 100MHz, and the amount of time series data increases, and the increase in calculation time becomes a problem. In order to shorten the calculation time, calculating the total amount of distortion generated by PA from the probability density of the modulation signal and the AM (amplitude modulation)-AM/PM (phase modulation) characteristics of PA is considered. For the AM-AM characteristics of PA, in this paper, IMD3 (inter modulation distortion 3) obtained from probability density and IMD3 by Fourier analysis, which are often used so long, are compared. As a result, it was confirmed that the result of probability density analysis is similar to that of Fourier analysis, when the nonlinearity is somewhat small. In addition, the agreement between the proposed method and the conventional method was confirmed with an error of about 2.0dB of ACLR using the modulation waves with a bandwidth of 5MHz, RB (resource block) being 25, and QPSK modulation.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.2021KEP0004/_p
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@ARTICLE{e105-a_11_1436,
author={Satoshi TANAKA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Distortion Analysis of RF Power Amplifier Using Probability Density of Input Signal and AM-AM Characteristics},
year={2022},
volume={E105-A},
number={11},
pages={1436-1442},
abstract={When confirming the ACLR (adjacent channel leakage power ratio), which are representative indicators of distortion in the design of PA (power amplifier), it is well known how to calculate the AM-AM/PM characteristics of PA, input time series data of modulated signals, and analyze the output by Fourier analysis. In 5G (5th generation) mobile phones, not only QPSK (quadrature phase shift keying) modulation but also 16QAM (quadrature modulation), 64QAM, and 256QAM are becoming more multivalued as modulation signals. In addition, the modulation band may exceed 100MHz, and the amount of time series data increases, and the increase in calculation time becomes a problem. In order to shorten the calculation time, calculating the total amount of distortion generated by PA from the probability density of the modulation signal and the AM (amplitude modulation)-AM/PM (phase modulation) characteristics of PA is considered. For the AM-AM characteristics of PA, in this paper, IMD3 (inter modulation distortion 3) obtained from probability density and IMD3 by Fourier analysis, which are often used so long, are compared. As a result, it was confirmed that the result of probability density analysis is similar to that of Fourier analysis, when the nonlinearity is somewhat small. In addition, the agreement between the proposed method and the conventional method was confirmed with an error of about 2.0dB of ACLR using the modulation waves with a bandwidth of 5MHz, RB (resource block) being 25, and QPSK modulation.},
keywords={},
doi={10.1587/transfun.2021KEP0004},
ISSN={1745-1337},
month={November},}
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TY - JOUR
TI - Distortion Analysis of RF Power Amplifier Using Probability Density of Input Signal and AM-AM Characteristics
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1436
EP - 1442
AU - Satoshi TANAKA
PY - 2022
DO - 10.1587/transfun.2021KEP0004
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E105-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2022
AB - When confirming the ACLR (adjacent channel leakage power ratio), which are representative indicators of distortion in the design of PA (power amplifier), it is well known how to calculate the AM-AM/PM characteristics of PA, input time series data of modulated signals, and analyze the output by Fourier analysis. In 5G (5th generation) mobile phones, not only QPSK (quadrature phase shift keying) modulation but also 16QAM (quadrature modulation), 64QAM, and 256QAM are becoming more multivalued as modulation signals. In addition, the modulation band may exceed 100MHz, and the amount of time series data increases, and the increase in calculation time becomes a problem. In order to shorten the calculation time, calculating the total amount of distortion generated by PA from the probability density of the modulation signal and the AM (amplitude modulation)-AM/PM (phase modulation) characteristics of PA is considered. For the AM-AM characteristics of PA, in this paper, IMD3 (inter modulation distortion 3) obtained from probability density and IMD3 by Fourier analysis, which are often used so long, are compared. As a result, it was confirmed that the result of probability density analysis is similar to that of Fourier analysis, when the nonlinearity is somewhat small. In addition, the agreement between the proposed method and the conventional method was confirmed with an error of about 2.0dB of ACLR using the modulation waves with a bandwidth of 5MHz, RB (resource block) being 25, and QPSK modulation.
ER -