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
PA(전력증폭기) 설계에 있어서 왜곡의 대표적인 지표인 ACLR(Adjacent Channel Leakage Power Ratio)을 확인할 때 PA의 AM-AM/PM 특성을 어떻게 계산하는지, 의 시계열 데이터를 입력하는 방법은 잘 알려져 있다. 변조된 신호를 처리하고 푸리에 분석을 통해 출력을 분석합니다. 5G(5세대) 휴대폰에서는 QPSK(Quadrature Phase Shift Keying) 변조뿐만 아니라 16QAM(Quadrature Modulation), 64QAM, 256QAM이 변조 신호로 더욱 다치화되고 있습니다. 또한, 변조 대역이 100MHz를 초과할 수 있으며, 시계열 데이터의 양이 증가하고, 계산 시간의 증가도 문제가 된다. 계산 시간을 단축하기 위해 변조 신호의 확률밀도와 PA의 AM(진폭 변조)-AM/PM(위상 변조) 특성으로부터 PA에서 발생하는 전체 왜곡량을 계산하는 것을 고려한다. 본 논문에서는 PA의 AM-AM 특성에 대해 확률밀도로부터 구한 IMD3(상호변조왜곡3)과 오랫동안 자주 사용되는 푸리에 분석에 의한 IMD3를 비교한다. 그 결과, 확률밀도분석 결과는 비선형성이 다소 작은 경우에는 푸리에 분석 결과와 유사함을 확인하였다. 또한, 대역폭 2.0MHz, RB(resource block) 5, QPSK 변조를 이용한 변조파를 이용하여 제안한 방법과 기존 방법의 ACLR 오차가 약 25dB 정도 일치함을 확인하였다.
Satoshi TANAKA
Murata Manufacturing Co., Ltd.
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부
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
부
@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},}
부
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 -