Universitat Politècnica de Catalunya
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
Universitat Politècnica de Catalunya. CSC - Components and Systems for Communications Research Group
2013
This paper presents how to apply order reduction in wide-band digital predistortion (DPD) linearizers using the principal component analysis (PCA) technique. This method is tested in a wireless backhauling transmitter where four 28 MHz adjacent subcarrier transmission of M-QAM signals are considered. The DPD has to counteract not only the PA nonlinear behavior, but also its dynamics. This may results critical when considering wideband signals since the number of coefficients required to model memory effects can grow dramatically. By applying the PCA technique, the number of essential parameters can be significantly reduced. In addition, a strategy to minimize the computational cost of finding the optimal coefficients is also presented. A test-bed for evaluating the DPD linearization performance of the RF subsystem when PCA is applied was deployed and experimental results are presented in this paper
Peer Reviewed
Postprint (published version)
Conference lecture
English
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació; Amplifiers (Electronics); Digital predistortion; Memory effects; Order reduction; Principal component analysis; Amplificadors de banda ampla
Institute of Electrical and Electronics Engineers (IEEE)
Restricted access - publisher's policy
E-prints [73026]
