Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers
|Title:||Mixture of Experts Approach for Behavioral Modeling of RF Power Amplifiers||Authors:||Brihuega, Alberto; Abdelaziz, Mahmoud; Anttila, Lauri; Li, Yue; Zhu, Anding; Valkama, Mikko||Permanent link:||http://hdl.handle.net/10197/12389||Date:||20-Jan-2021||Online since:||2021-08-09T13:31:20Z||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.||Type of material:||Conference Publication||Publisher:||IEEE||Copyright (published version):||2021 IEEE||Keywords:||Radio frequency; Wireless communication; OFDM; Nonlinear distortion; Power amplifiers; Load modeling; Context modeling||DOI:||10.1109/PAWR51852.2021.9375546||Other versions:||https://www.radiowirelessweek.org/conferences/pawr/||Language:||en||Status of Item:||Peer reviewed||Is part of:||2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021||Conference Details:||The 2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR 2021), Virtual Conference, 17-20 January 2021||ISBN:||9780738143675||This item is made available under a Creative Commons License:||https://creativecommons.org/licenses/by-nc-nd/3.0/ie/|
|Appears in Collections:||Electrical and Electronic Engineering Research Collection|
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