Architectures for joint compensation of RoF and PA with nonideal feedback

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

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

17 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 languageEnglish
Title of host publication2010 IEEE 71st Vehicular Technology Conference
ISBN (Electronic)978-1-4244-2519-8
DOIs
Publication statusPublished - 2010
MoE publication typeNot Eligible
Event71st IEEE Vehicular Technology Conference, VTC 2010-Spring - Tapei, Taiwan, Province of China
Duration: 16 May 201019 May 2010
Conference number: 71

Publication series

Name
ISSN (Print)1550-2252
ISSN (Electronic)1550-2252

Conference

Conference71st IEEE Vehicular Technology Conference, VTC 2010-Spring
Abbreviated titleVTC 2010-Spring
CountryTaiwan, Province of China
CityTapei
Period16/05/1019/05/10

Fingerprint

Radio-over-fiber
Fiber amplifiers
Power amplifiers
Feedback
Nonlinear distortion
Adaptive algorithms
Communication systems
Degradation
Compensation and Redress

Keywords

  • Adaptive predistortion
  • LMS
  • Power amplifier
  • Radio over Fiber
  • RLS
  • RoF

Cite this

Hekkala, A., Lasanen, M., Vieira, L. C., Gomes, N. J., & Nkansah, A. (2010). Architectures for joint compensation of RoF and PA with nonideal feedback. In 2010 IEEE 71st Vehicular Technology Conference https://doi.org/10.1109/VETECS.2010.5493871
Hekkala, Atso ; Lasanen, Mika ; Vieira, Luis Carlos ; Gomes, Nathan J. ; Nkansah, Anthony. / Architectures for joint compensation of RoF and PA with nonideal feedback. 2010 IEEE 71st Vehicular Technology Conference. 2010.
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Hekkala, A, Lasanen, M, Vieira, LC, Gomes, NJ & Nkansah, A 2010, Architectures for joint compensation of RoF and PA with nonideal feedback. in 2010 IEEE 71st Vehicular Technology Conference. 71st IEEE Vehicular Technology Conference, VTC 2010-Spring, Tapei, Taiwan, Province of China, 16/05/10. https://doi.org/10.1109/VETECS.2010.5493871

Architectures for joint compensation of RoF and PA with nonideal feedback. / Hekkala, Atso; Lasanen, Mika; Vieira, Luis Carlos; Gomes, Nathan J. ; Nkansah, Anthony.

2010 IEEE 71st Vehicular Technology Conference. 2010.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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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.

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Hekkala A, Lasanen M, Vieira LC, Gomes NJ, Nkansah A. Architectures for joint compensation of RoF and PA with nonideal feedback. In 2010 IEEE 71st Vehicular Technology Conference. 2010 https://doi.org/10.1109/VETECS.2010.5493871