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

    22 Citations (Scopus)


    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
    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


    Conference71st IEEE Vehicular Technology Conference, VTC 2010-Spring
    Abbreviated titleVTC 2010-Spring
    Country/TerritoryTaiwan, Province of China


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


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