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Title:
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Order reduction of wideband digital predistorters using principal component analysis
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Author:
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Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; López Bueno, David; Bartzoudis, Nikolaos; Bertran Albertí, Eduardo; Payaró Llisterri, Miquel; Hourtane, Alain
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CSC - Components and Systems for Communications Research Group |
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Abstract:
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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 |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
-Amplifiers (Electronics)
-Digital predistortion
-Memory effects
-Order reduction
-Principal component analysis
-Amplificadors de banda ampla |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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