Título:
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Spectral weighting orthogonal matching pursuit algorithm for enhanced out-of-band digital predistortion linearization
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Autor/a:
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Gilabert Pinal, Pere Lluís; López Bueno, David; Montoro López, Gabriel
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. Doctorat en Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CSC - Components and Systems for Communications Research Group |
Abstract:
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Abstract:
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This paper presents a new variant of the orthogonal matching pursuit (OMP) algorithm for reducing the computational complexity of the digital predistortion (DPD) behavioral model in the forward path. The proposed spectral weighting OMP (SW-OMP) algorithm focuses on selecting the most relevant basis functions to compensate for the out-of-band residual distortion which may eventually be masked by the dominant in-band residual error. This basis selection is carried out in an off-line process that does not affect the computational complexity of the real-time closed-loop DPD but, on the contrary, reduces its complexity while enhancing the robustness. Experimental results show that by selecting the DPD coefficients with the SW-OMP, the inherent ACLR and NMSE degradation suffered when reducing the number of coefficients is mitigated under strong nonlinear operation, when compared to using the basis functions selected by the classical OMP algorithm. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Àrees temàtiques de la UPC::Enginyeria electrònica::Circuits electrònics -Very high speed integrated circuits -Sustainable development -5G mobile communication -Power amplifiers -Digital predistortion linearization -Circuits integrats d'alta velocitat -Desenvolupament sostenible |
Derechos:
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Tipo de documento:
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Artículo - Versión presentada Artículo |
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