Performance of adaptive algorithms for compensation of radio over fiber links

Author

Hekkala, Atso ; Lasanen, Mika

Author_Institution

VTT Tech. Res. Centre of Finland, Oulu

fYear

2009

fDate

22-24 April 2009

Firstpage

1

Lastpage

5

Abstract

This paper considers the adaptive predistortion of the nonlinear distortions in a Radio over Fiber (RoF) link. In particular, we modify and compare two adaptive algorithms developed originally for the compensation of the linear systems, namely LMS and variable step size normalized LMS (VS NLMS). A recursive least squares (RLS) solution is used as a reference. Our simulation results indicate that over 40 dB improvement of adjacent channel power ratios can be achieved via the predistortion. Furthermore, we show that in the compensation of the nonlinear RoF link, the LMS can be used in such a way that its performance is comparable to more complex RLS.

Keywords

least mean squares methods; nonlinear distortion; radio-over-fibre; recursive functions; adaptive algorithm; adaptive predistortion; linear system compensation; nonlinear distortion; radio over fiber link; recursive least square solution; variable step size normalized LMS; Adaptive algorithm; Least squares approximation; Least squares methods; Linear systems; Nonlinear distortion; Optical fibers; Polynomials; Predistortion; Resonance light scattering; Table lookup; LMS; RLS; RoF; VS NLMS; polynomial predistorter; predistortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Telecommunications Symposium, 2009. WTS 2009

Conference_Location

Prague

ISSN

1934-5070

Print_ISBN

978-1-4244-2588-4

Electronic_ISBN

1934-5070

Type

conf

DOI

10.1109/WTS.2009.5068962

Filename

5068962