Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers

Alberto Brihuega; Mahmoud Abdelaziz; Lauri Anttila; Yue Li; Anding Zhu; Mikko Valkama

doi:10.1109/PAWR51852.2021.9375546

Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers

Alberto Brihuega, Mahmoud Abdelaziz, Lauri Anttila, Yue Li, Anding Zhu, Mikko Valkama

Sähkötekniikka

Tutkimustuotos: Konferenssiartikkeli › Scientific › vertaisarvioitu

13 Lataukset (Pure)

Abstrakti

Piece-wise (PW) behavioral models are commonly adopted when modeling RF power amplifiers (PAs) that exhibit strong amplitude dependent nonlinear distortion characteristics. In this paper, we consider a new PW model for PAs based on the mixture of experts (ME) approach. We first introduce the ME framework theory while also extend it such that it can be applied to model complex baseband signals and nonlinearities. Then, we show how the ME model allows overcoming some of the intrinsic shortcomings that existing PW behavioral models commonly exhibit, which translates into improved modeling accuracy. The proposed solution is validated with extensive RF measurements on a load modulated balanced PA at 2.1 GHz, excited by a 320 MHz OFDM signal, and is benchmarked against several state-of-the art PW models.

Alkuperäiskieli	Englanti
Otsikko	2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021
Kustantaja	IEEE
Sivut	31-33
Sivumäärä	3
ISBN (elektroninen)	9780738143675
DOI - pysyväislinkit	https://doi.org/10.1109/PAWR51852.2021.9375546
Tila	Julkaistu - 2021
OKM-julkaisutyyppi	A4 Artikkeli konferenssijulkaisussa
Tapahtuma	IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications - Kesto: 17 tammik. 2021 → 22 tammik. 2021

Julkaisusarja

Nimi	2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021
ISSN (elektroninen)	2473-4640

Conference

Conference	IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications
Ajanjakso	17/01/21 → 22/01/21

Julkaisufoorumi-taso

Jufo-taso 1

!!ASJC Scopus subject areas

Computer Networks and Communications
Electrical and Electronic Engineering
Instrumentation

Pääsy asiakirjaan

10.1109/PAWR51852.2021.9375546

Mixture_of_experts_approach_for_behavioral_modeling_of_RF_power_amplifiers
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Accepted author manuscript, 4,02 MBLisenssi: Unspecified

https://urn.fi/URN:NBN:fi:tuni-202110157607

Siteeraa tätä

Brihuega, A., Abdelaziz, M., Anttila, L., Li, Y., Zhu, A., & Valkama, M. (2021). Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers. teoksessa 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021 (Sivut 31-33). (2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021). IEEE. https://doi.org/10.1109/PAWR51852.2021.9375546

Brihuega, Alberto ; Abdelaziz, Mahmoud ; Anttila, Lauri et al. / Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers. 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021. IEEE, 2021. Sivut 31-33 (2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021).

@inproceedings{785e7cb776d846dea0e762ed75a99fe0,

title = "Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers",

abstract = "Piece-wise (PW) behavioral models are commonly adopted when modeling RF power amplifiers (PAs) that exhibit strong amplitude dependent nonlinear distortion characteristics. In this paper, we consider a new PW model for PAs based on the mixture of experts (ME) approach. We first introduce the ME framework theory while also extend it such that it can be applied to model complex baseband signals and nonlinearities. Then, we show how the ME model allows overcoming some of the intrinsic shortcomings that existing PW behavioral models commonly exhibit, which translates into improved modeling accuracy. The proposed solution is validated with extensive RF measurements on a load modulated balanced PA at 2.1 GHz, excited by a 320 MHz OFDM signal, and is benchmarked against several state-of-the art PW models. ",

keywords = "5G new radio, behavioral modeling, nonlinear distortion, piece-wise polynomials, power amplifiers",

author = "Alberto Brihuega and Mahmoud Abdelaziz and Lauri Anttila and Yue Li and Anding Zhu and Mikko Valkama",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications ; Conference date: 17-01-2021 Through 22-01-2021",

year = "2021",

doi = "10.1109/PAWR51852.2021.9375546",

language = "English",

series = "2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021",

publisher = "IEEE",

pages = "31--33",

booktitle = "2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021",

}

Brihuega, A, Abdelaziz, M, Anttila, L, Li, Y, Zhu, A & Valkama, M 2021, Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers. julkaisussa 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021. 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021, IEEE, Sivut 31-33, IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, 17/01/21. https://doi.org/10.1109/PAWR51852.2021.9375546

Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers. / Brihuega, Alberto; Abdelaziz, Mahmoud; Anttila, Lauri et al.

2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021. IEEE, 2021. s. 31-33 (2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021).

Tutkimustuotos: Konferenssiartikkeli › Scientific › vertaisarvioitu

TY - GEN

T1 - Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers

AU - Brihuega, Alberto

AU - Abdelaziz, Mahmoud

AU - Anttila, Lauri

AU - Li, Yue

AU - Zhu, Anding

AU - Valkama, Mikko

PY - 2021

Y1 - 2021

N2 - Piece-wise (PW) behavioral models are commonly adopted when modeling RF power amplifiers (PAs) that exhibit strong amplitude dependent nonlinear distortion characteristics. In this paper, we consider a new PW model for PAs based on the mixture of experts (ME) approach. We first introduce the ME framework theory while also extend it such that it can be applied to model complex baseband signals and nonlinearities. Then, we show how the ME model allows overcoming some of the intrinsic shortcomings that existing PW behavioral models commonly exhibit, which translates into improved modeling accuracy. The proposed solution is validated with extensive RF measurements on a load modulated balanced PA at 2.1 GHz, excited by a 320 MHz OFDM signal, and is benchmarked against several state-of-the art PW models.

AB - Piece-wise (PW) behavioral models are commonly adopted when modeling RF power amplifiers (PAs) that exhibit strong amplitude dependent nonlinear distortion characteristics. In this paper, we consider a new PW model for PAs based on the mixture of experts (ME) approach. We first introduce the ME framework theory while also extend it such that it can be applied to model complex baseband signals and nonlinearities. Then, we show how the ME model allows overcoming some of the intrinsic shortcomings that existing PW behavioral models commonly exhibit, which translates into improved modeling accuracy. The proposed solution is validated with extensive RF measurements on a load modulated balanced PA at 2.1 GHz, excited by a 320 MHz OFDM signal, and is benchmarked against several state-of-the art PW models.

KW - 5G new radio

KW - behavioral modeling

KW - nonlinear distortion

KW - piece-wise polynomials

KW - power amplifiers

U2 - 10.1109/PAWR51852.2021.9375546

DO - 10.1109/PAWR51852.2021.9375546

M3 - Conference contribution

AN - SCOPUS:85103508066

T3 - 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021

SP - 31

EP - 33

BT - 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021

PB - IEEE

T2 - IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications

Y2 - 17 January 2021 through 22 January 2021

ER -

Brihuega A, Abdelaziz M, Anttila L, Li Y, Zhu A, Valkama M. Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers. julkaisussa 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021. IEEE. 2021. s. 31-33. (2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021). doi: 10.1109/PAWR51852.2021.9375546

Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers

Abstrakti

Julkaisusarja

Conference

Julkaisufoorumi-taso

!!ASJC Scopus subject areas

Pääsy asiakirjaan

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