Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters with Application to Digital Predistortion

Souheil Ben Smida; Oualid Hammi; Andrew Kwan; Mohammad S. Sharawi; Kevin Morris; Fadhel M. Ghannouchi

doi:10.1109/TMTT.2016.2585494

Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters with Application to Digital Predistortion

Souheil Ben Smida, Oualid Hammi, Andrew Kwan, Mohammad S. Sharawi, Kevin Morris, Fadhel M. Ghannouchi

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

This paper reports a new measurement method for wideband radiofrequency power amplifier characterization and digital predistortion. The proposed measurement procedure relaxes significantly the sampling rate requirement on the analog to digital converters of the feedback path. Successful PA linearizations were achieved in the presence of 20 MHz, 40 MHz, and 60 MHz LTE-A signals using a vector signal analyzer with sampling speeds equal to only 24 Msps, 40.96 Msps, and 61.44 Msps, respectively. Despite these very low sampling rates, a quasi perfect cancellation of the PA distortions was achieved (more than 50 dBc in terms of ACLR), in all tests, over bandwidths including up to fifth order intermodulation distortions. Such correction bandwidth is much wider than the observation bandwidths associated with the receiver sampling rates.

Original language	English
Pages (from-to)	2640-2651
Number of pages	12
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	64
Issue number	8
DOIs	https://doi.org/10.1109/TMTT.2016.2585494
Publication status	Published - 19 Jul 2016

Keywords

Digital predistortion
dynamic distortions
LTE-advanced
memory effects
power amplifier
vector signal analysis
wideband

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10.1109/TMTT.2016.2585494

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Ben Smida, S.
1/10/15 → 30/06/17
Project: Research

Cite this

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title = "Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters with Application to Digital Predistortion",

abstract = "This paper reports a new measurement method for wideband radiofrequency power amplifier characterization and digital predistortion. The proposed measurement procedure relaxes significantly the sampling rate requirement on the analog to digital converters of the feedback path. Successful PA linearizations were achieved in the presence of 20 MHz, 40 MHz, and 60 MHz LTE-A signals using a vector signal analyzer with sampling speeds equal to only 24 Msps, 40.96 Msps, and 61.44 Msps, respectively. Despite these very low sampling rates, a quasi perfect cancellation of the PA distortions was achieved (more than 50 dBc in terms of ACLR), in all tests, over bandwidths including up to fifth order intermodulation distortions. Such correction bandwidth is much wider than the observation bandwidths associated with the receiver sampling rates.",

keywords = "Digital predistortion, dynamic distortions, LTE-advanced, memory effects, power amplifier, vector signal analysis, wideband",

author = "{Ben Smida}, Souheil and Oualid Hammi and Andrew Kwan and Sharawi, {Mohammad S.} and Kevin Morris and Ghannouchi, {Fadhel M.}",

year = "2016",

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T1 - Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters with Application to Digital Predistortion

AU - Ben Smida, Souheil

AU - Hammi, Oualid

AU - Kwan, Andrew

AU - Sharawi, Mohammad S.

AU - Morris, Kevin

AU - Ghannouchi, Fadhel M.

PY - 2016/7/19

Y1 - 2016/7/19

N2 - This paper reports a new measurement method for wideband radiofrequency power amplifier characterization and digital predistortion. The proposed measurement procedure relaxes significantly the sampling rate requirement on the analog to digital converters of the feedback path. Successful PA linearizations were achieved in the presence of 20 MHz, 40 MHz, and 60 MHz LTE-A signals using a vector signal analyzer with sampling speeds equal to only 24 Msps, 40.96 Msps, and 61.44 Msps, respectively. Despite these very low sampling rates, a quasi perfect cancellation of the PA distortions was achieved (more than 50 dBc in terms of ACLR), in all tests, over bandwidths including up to fifth order intermodulation distortions. Such correction bandwidth is much wider than the observation bandwidths associated with the receiver sampling rates.

AB - This paper reports a new measurement method for wideband radiofrequency power amplifier characterization and digital predistortion. The proposed measurement procedure relaxes significantly the sampling rate requirement on the analog to digital converters of the feedback path. Successful PA linearizations were achieved in the presence of 20 MHz, 40 MHz, and 60 MHz LTE-A signals using a vector signal analyzer with sampling speeds equal to only 24 Msps, 40.96 Msps, and 61.44 Msps, respectively. Despite these very low sampling rates, a quasi perfect cancellation of the PA distortions was achieved (more than 50 dBc in terms of ACLR), in all tests, over bandwidths including up to fifth order intermodulation distortions. Such correction bandwidth is much wider than the observation bandwidths associated with the receiver sampling rates.

KW - Digital predistortion

KW - dynamic distortions

KW - LTE-advanced

KW - memory effects

KW - power amplifier

KW - vector signal analysis

KW - wideband

U2 - 10.1109/TMTT.2016.2585494

DO - 10.1109/TMTT.2016.2585494

M3 - Article (Academic Journal)

VL - 64

SP - 2640

EP - 2651

JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

SN - 0018-9480

IS - 8

ER -

Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters with Application to Digital Predistortion

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