On the Impact of Timing Mismatch and Memory Length on Digital Predistortion Systems

Markus Hoflehner; Andreas Springer

On the Impact of Timing Mismatch and Memory Length on Digital Predistortion Systems

Department of Communications Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

Abstract

Nonlinear power amplifiers (PAs) are commonly linearized by means of digital predistortion (DPD). To identify the predistorter, the input and output signals of the PA are compared. We analyze the impact of a delay mismatch between PA input and output signal on DPD system performance. Using various simulations and measurements, we examine the relation between the memory length of the DPD system and the delay of the PA. We will show that – up to a certain point – delay overestimation can be compensated for by the memory of the predistorter without performance degradation.

Original language	English
Title of host publication	Microwave Conference (EuMC), 2012 42st European
Number of pages	4
Publication status	Published - Oct 2012

Fields of science

202030 Communication engineering
202038 Telecommunications

JKU Focus areas

Mechatronics and Information Processing

Cite this

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title = "On the Impact of Timing Mismatch and Memory Length on Digital Predistortion Systems",

abstract = "Nonlinear power amplifiers (PAs) are commonly linearized by means of digital predistortion (DPD). To identify the predistorter, the input and output signals of the PA are compared. We analyze the impact of a delay mismatch between PA input and output signal on DPD system performance. Using various simulations and measurements, we examine the relation between the memory length of the DPD system and the delay of the PA. We will show that – up to a certain point – delay overestimation can be compensated for by the memory of the predistorter without performance degradation.",

author = "Markus Hoflehner and Andreas Springer",

year = "2012",

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T1 - On the Impact of Timing Mismatch and Memory Length on Digital Predistortion Systems

AU - Hoflehner, Markus

AU - Springer, Andreas

PY - 2012/10

Y1 - 2012/10

N2 - Nonlinear power amplifiers (PAs) are commonly linearized by means of digital predistortion (DPD). To identify the predistorter, the input and output signals of the PA are compared. We analyze the impact of a delay mismatch between PA input and output signal on DPD system performance. Using various simulations and measurements, we examine the relation between the memory length of the DPD system and the delay of the PA. We will show that – up to a certain point – delay overestimation can be compensated for by the memory of the predistorter without performance degradation.

AB - Nonlinear power amplifiers (PAs) are commonly linearized by means of digital predistortion (DPD). To identify the predistorter, the input and output signals of the PA are compared. We analyze the impact of a delay mismatch between PA input and output signal on DPD system performance. Using various simulations and measurements, we examine the relation between the memory length of the DPD system and the delay of the PA. We will show that – up to a certain point – delay overestimation can be compensated for by the memory of the predistorter without performance degradation.

UR - http://www.eumweek.com/2012/EuMC.asp?id=c

M3 - Conference proceedings

BT - Microwave Conference (EuMC), 2012 42st European

ER -

On the Impact of Timing Mismatch and Memory Length on Digital Predistortion Systems

Abstract

Fields of science

JKU Focus areas

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