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Presentation 2021-11-18 11:45
Distortion Analysis of RF Power Amplifier Using Probability Density of Input Signal and AM-AM Characteristics
Satoshi Tanaka (Murata Manufacturing) CAS2021-43 MSS2021-23
Abstract (in Japanese) (See Japanese page) 
(in English) 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 100 MHz, and the amount of time series data increases, and the increase in calculation time becomes a problem. In order to shorten the calculation time, it is considered that 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. In this paper, we first focus on the AM-AM characteristics of PA, and compare the Fourier analysis of the IMD3 (inter modulation distortion 3) when two-tone signals are input and those obtained from probability density. As a result, it was confirmed that the two agree well when the nonlinearity is somewhat small.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile Phone / Power Amplifier / Non-Linear / AM-AM / Probability Density / IMD / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 249, CAS2021-43, pp. 34-39, Nov. 2021.
Paper # CAS2021-43 
Date of Issue 2021-11-11 (CAS, MSS) 
ISSN Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF CAS2021-43 MSS2021-23

Conference Information
Committee MSS CAS IPSJ-AL  
Conference Date 2021-11-18 - 2021-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CAS 
Conference Code 2021-11-MSS-CAS-AL 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Distortion Analysis of RF Power Amplifier Using Probability Density of Input Signal and AM-AM Characteristics 
Sub Title (in English)  
Keyword(1) Mobile Phone  
Keyword(2) Power Amplifier  
Keyword(3) Non-Linear  
Keyword(4) AM-AM  
Keyword(5) Probability Density  
Keyword(6) IMD  
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Keyword(8)  
1st Author's Name Satoshi Tanaka  
1st Author's Affiliation Murata Manufacturing Co. Ltd. (Murata Manufacturing)
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Date Time 2021-11-18 11:45:00 
Presentation Time 25 minutes 
Registration for CAS 
Paper # CAS2021-43, MSS2021-23 
Volume (vol) vol.121 
Number (no) no.249(CAS), no.250(MSS) 
Page pp.34-39 
#Pages
Date of Issue 2021-11-11 (CAS, MSS) 


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