Architectures for joint compensation of RoF and PA with nonideal feedback

Atso Hekkala; Mika Lasanen; Luis Carlos Vieira; Nathan J.  Gomes; Anthony Nkansah

doi:10.1109/VETECS.2010.5493871

Architectures for joint compensation of RoF and PA with nonideal feedback

Atso Hekkala, Mika Lasanen, Luis Carlos Vieira, Nathan J. Gomes, Anthony Nkansah

University of Kent

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

22 Citations (Scopus)

Abstract

A high capacity wireless communication system requires careful design to minimize interference and distortion effects. This paper considers the adaptive predistortion of the nonlinear distortions induced by a Radio over Fiber (RoF) link and power amplifier (PA) connected in series. In particular, we study the architectures for the joint compensation of the nonlinearities in the presence of nonideal feedback. From the adaptive algorithm point of view, we study different combinations of algorithms for the predistortion. Our simulation results indicate that combined use of least mean squares (LMS) and recursive least squares (RLS) gives the best trade-off between complexity and performance. In addition, we show that the use of nonideal feedback causes a collapse in the performance of the predistortion. However, when using a compensated RoF link for feedback, the degradation of the adjacent channel power is very small compared to the case of the ideal feedback.

Original language	English
Title of host publication	2010 IEEE 71st Vehicular Technology Conference
ISBN (Electronic)	978-1-4244-2519-8
DOIs	https://doi.org/10.1109/VETECS.2010.5493871
Publication status	Published - 2010
MoE publication type	Not Eligible
Event	71st IEEE Vehicular Technology Conference, VTC 2010-Spring - Tapei, Taiwan, Province of China Duration: 16 May 2010 → 19 May 2010 Conference number: 71

Conference

Conference	71st IEEE Vehicular Technology Conference, VTC 2010-Spring
Abbreviated title	VTC 2010-Spring
Country/Territory	Taiwan, Province of China
City	Tapei
Period	16/05/10 → 19/05/10

Keywords

Adaptive predistortion
LMS
Power amplifier
Radio over Fiber
RLS
RoF

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10.1109/VETECS.2010.5493871

Cite this

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title = "Architectures for joint compensation of RoF and PA with nonideal feedback",

abstract = "A high capacity wireless communication system requires careful design to minimize interference and distortion effects. This paper considers the adaptive predistortion of the nonlinear distortions induced by a Radio over Fiber (RoF) link and power amplifier (PA) connected in series. In particular, we study the architectures for the joint compensation of the nonlinearities in the presence of nonideal feedback. From the adaptive algorithm point of view, we study different combinations of algorithms for the predistortion. Our simulation results indicate that combined use of least mean squares (LMS) and recursive least squares (RLS) gives the best trade-off between complexity and performance. In addition, we show that the use of nonideal feedback causes a collapse in the performance of the predistortion. However, when using a compensated RoF link for feedback, the degradation of the adjacent channel power is very small compared to the case of the ideal feedback.",

keywords = "Adaptive predistortion, LMS, Power amplifier, Radio over Fiber, RLS, RoF",

author = "Atso Hekkala and Mika Lasanen and Vieira, {Luis Carlos} and Gomes, {Nathan J.} and Anthony Nkansah",

year = "2010",

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note = "71st IEEE Vehicular Technology Conference, VTC 2010-Spring, VTC 2010-Spring ; Conference date: 16-05-2010 Through 19-05-2010",

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AU - Hekkala, Atso

AU - Lasanen, Mika

AU - Vieira, Luis Carlos

AU - Gomes, Nathan J.

AU - Nkansah, Anthony

N1 - Conference code: 71

PY - 2010

Y1 - 2010

N2 - A high capacity wireless communication system requires careful design to minimize interference and distortion effects. This paper considers the adaptive predistortion of the nonlinear distortions induced by a Radio over Fiber (RoF) link and power amplifier (PA) connected in series. In particular, we study the architectures for the joint compensation of the nonlinearities in the presence of nonideal feedback. From the adaptive algorithm point of view, we study different combinations of algorithms for the predistortion. Our simulation results indicate that combined use of least mean squares (LMS) and recursive least squares (RLS) gives the best trade-off between complexity and performance. In addition, we show that the use of nonideal feedback causes a collapse in the performance of the predistortion. However, when using a compensated RoF link for feedback, the degradation of the adjacent channel power is very small compared to the case of the ideal feedback.

AB - A high capacity wireless communication system requires careful design to minimize interference and distortion effects. This paper considers the adaptive predistortion of the nonlinear distortions induced by a Radio over Fiber (RoF) link and power amplifier (PA) connected in series. In particular, we study the architectures for the joint compensation of the nonlinearities in the presence of nonideal feedback. From the adaptive algorithm point of view, we study different combinations of algorithms for the predistortion. Our simulation results indicate that combined use of least mean squares (LMS) and recursive least squares (RLS) gives the best trade-off between complexity and performance. In addition, we show that the use of nonideal feedback causes a collapse in the performance of the predistortion. However, when using a compensated RoF link for feedback, the degradation of the adjacent channel power is very small compared to the case of the ideal feedback.

KW - Adaptive predistortion

KW - LMS

KW - Power amplifier

KW - Radio over Fiber

KW - RLS

KW - RoF

U2 - 10.1109/VETECS.2010.5493871

DO - 10.1109/VETECS.2010.5493871

M3 - Conference article in proceedings

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BT - 2010 IEEE 71st Vehicular Technology Conference

T2 - 71st IEEE Vehicular Technology Conference, VTC 2010-Spring

Y2 - 16 May 2010 through 19 May 2010

ER -

Architectures for joint compensation of RoF and PA with nonideal feedback

Abstract

Conference

Keywords

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