Novel Data Pre-distorter for APSK Signals in Solid-State Power Amplifiers

Maria Canavate Sanchez; Andrea Segneri; Savvas A. Kosmopoulos; Qiuming Zhu; Theodoros A. Tsiftsis; Apostolos Georgiadis; George Goussetis

doi:10.1109/TCSI.2019.2921100

Novel Data Pre-distorter for APSK Signals in Solid-State Power Amplifiers

Maria Canavate Sanchez, Andrea Segneri, Savvas A. Kosmopoulos, Qiuming Zhu, Theodoros A. Tsiftsis, Apostolos Georgiadis, George Goussetis

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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Abstract

A computationally efficient data pre-distorter suitable for the 16 amplitude and phase-shift keying (APSK) constellation transmitted through a memoryless non-linear power amplifier is introduced. The proposed method is based on estimating the optimum value of the ring ratio that enables compensation for the power amplifier (PA) distortion occurring at each input back-off (IBO) level of a memoryless behavioral model. Previous results for data pre-distortion rely on iterative numerical optimization techniques which require increased computational resources. Instead, the proposed approach is numerically efficient and further provides insight on the generation of non-linear distortion. Computed and measured bit-error rate (BER) results for 16-APSK in additive white Gaussian noise (AWGN) channel and the presence of a PA are presented to prove the validity of the method. The performance evaluation of the pre-distorter based on a measured non-linear characteristic of a commercial power amplifier showed a BER reduction of up to four orders of magnitude at low IBO levels.

Original language	English
Pages (from-to)	4044-4054
Number of pages	11
Journal	IEEE Transactions on Circuits and Systems I: Regular Papers
Volume	66
Issue number	10
Early online date	18 Jun 2019
DOIs	https://doi.org/10.1109/TCSI.2019.2921100
Publication status	Published - Oct 2019

Keywords

APSK modulation
data pre-distortion
non-linearities
power amplifier

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/TCSI.2019.2921100

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abstract = "A computationally efficient data pre-distorter suitable for the 16 amplitude and phase-shift keying (APSK) constellation transmitted through a memoryless non-linear power amplifier is introduced. The proposed method is based on estimating the optimum value of the ring ratio that enables compensation for the power amplifier (PA) distortion occurring at each input back-off (IBO) level of a memoryless behavioral model. Previous results for data pre-distortion rely on iterative numerical optimization techniques which require increased computational resources. Instead, the proposed approach is numerically efficient and further provides insight on the generation of non-linear distortion. Computed and measured bit-error rate (BER) results for 16-APSK in additive white Gaussian noise (AWGN) channel and the presence of a PA are presented to prove the validity of the method. The performance evaluation of the pre-distorter based on a measured non-linear characteristic of a commercial power amplifier showed a BER reduction of up to four orders of magnitude at low IBO levels.",

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AU - Tsiftsis, Theodoros A.

AU - Georgiadis, Apostolos

AU - Goussetis, George

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Novel Data Pre-distorter for APSK Signals in Solid-State Power Amplifiers

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Keywords

ASJC Scopus subject areas

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