Predistortion of radio over fiber links: Algorithms, implementation, and measurements

Atso Hekkala; Mikko Hiivala; Mika Lasanen; Jari Perttu; Luis C. Vieira; Nathan J. Gomes; Anthony Nkansah

doi:10.1109/TCSI.2011.2167267

Predistortion of radio over fiber links: Algorithms, implementation, and measurements

Atso Hekkala, Mikko Hiivala, Mika Lasanen, Jari Perttu, Luis C. Vieira, Nathan J. Gomes, Anthony Nkansah

University of Kent

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

62 Citations (Scopus)

Abstract

Distributed antenna systems (DASs) have been proposed for use in high-data-rate wireless communications. Connecting the central unit to remote antenna units, radio over fiber (RoF) links become essential parts of the DAS. One of the major problems in the RoF links is the nonlinear distortion experienced in its optoelectronic devices. This paper considers the adaptive compensation of the nonlinear RoF link. In particular, we present an extension to the conventional least-mean-square algorithm for memory-polynomial-based predistortion. In addition, we study different combinations of the algorithms for the predistortion. Moreover, we implement the adaptive predistorter in hardware, build a real RoF link, and verify the performance by measurements. The results demonstrate that distortion of the RoF link can be considerably diminished with a low complexity design.

Original language	English
Pages (from-to)	664-672
Journal	IEEE Transactions on Circuits and Systems I: Regular Papers
Volume	59
Issue number	3
DOIs	https://doi.org/10.1109/TCSI.2011.2167267
Publication status	Published - 2012
MoE publication type	A1 Journal article-refereed

Keywords

Adaptive compensation
field programmable gate array
FPGA
least mean square
LMS
radio over fiber
recursive least squares
RLS

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10.1109/TCSI.2011.2167267

Cite this

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title = "Predistortion of radio over fiber links: Algorithms, implementation, and measurements",

abstract = "Distributed antenna systems (DASs) have been proposed for use in high-data-rate wireless communications. Connecting the central unit to remote antenna units, radio over fiber (RoF) links become essential parts of the DAS. One of the major problems in the RoF links is the nonlinear distortion experienced in its optoelectronic devices. This paper considers the adaptive compensation of the nonlinear RoF link. In particular, we present an extension to the conventional least-mean-square algorithm for memory-polynomial-based predistortion. In addition, we study different combinations of the algorithms for the predistortion. Moreover, we implement the adaptive predistorter in hardware, build a real RoF link, and verify the performance by measurements. The results demonstrate that distortion of the RoF link can be considerably diminished with a low complexity design.",

keywords = "Adaptive compensation, field programmable gate array, FPGA, least mean square, LMS, radio over fiber, recursive least squares, RLS",

author = "Atso Hekkala and Mikko Hiivala and Mika Lasanen and Jari Perttu and Vieira, {Luis C.} and Gomes, {Nathan J.} and Anthony Nkansah",

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T2 - Algorithms, implementation, and measurements

AU - Hekkala, Atso

AU - Hiivala, Mikko

AU - Lasanen, Mika

AU - Perttu, Jari

AU - Vieira, Luis C.

AU - Gomes, Nathan J.

AU - Nkansah, Anthony

N1 - Project code: 19083

PY - 2012

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N2 - Distributed antenna systems (DASs) have been proposed for use in high-data-rate wireless communications. Connecting the central unit to remote antenna units, radio over fiber (RoF) links become essential parts of the DAS. One of the major problems in the RoF links is the nonlinear distortion experienced in its optoelectronic devices. This paper considers the adaptive compensation of the nonlinear RoF link. In particular, we present an extension to the conventional least-mean-square algorithm for memory-polynomial-based predistortion. In addition, we study different combinations of the algorithms for the predistortion. Moreover, we implement the adaptive predistorter in hardware, build a real RoF link, and verify the performance by measurements. The results demonstrate that distortion of the RoF link can be considerably diminished with a low complexity design.

AB - Distributed antenna systems (DASs) have been proposed for use in high-data-rate wireless communications. Connecting the central unit to remote antenna units, radio over fiber (RoF) links become essential parts of the DAS. One of the major problems in the RoF links is the nonlinear distortion experienced in its optoelectronic devices. This paper considers the adaptive compensation of the nonlinear RoF link. In particular, we present an extension to the conventional least-mean-square algorithm for memory-polynomial-based predistortion. In addition, we study different combinations of the algorithms for the predistortion. Moreover, we implement the adaptive predistorter in hardware, build a real RoF link, and verify the performance by measurements. The results demonstrate that distortion of the RoF link can be considerably diminished with a low complexity design.

KW - Adaptive compensation

KW - field programmable gate array

KW - FPGA

KW - least mean square

KW - LMS

KW - radio over fiber

KW - recursive least squares

KW - RLS

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DO - 10.1109/TCSI.2011.2167267

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JO - IEEE Transactions on Circuits and Systems I: Regular Papers

JF - IEEE Transactions on Circuits and Systems I: Regular Papers

IS - 3

ER -

Predistortion of radio over fiber links: Algorithms, implementation, and measurements

Abstract

Keywords

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