63037 20190709135519.0 doi 10.1109/JPHOT.2017.2706364 sideral 101715 ART-2017-101715 eng (orcid)0000-0003-1021-3993 Mateo, C. Minimization of Feedback Loop Distortions in Digital Predistortion of a Radio-Over-Fiber System with Optimization Algorithms 2017 Access copy available to the general public Unrestricted This article proposes the linearization of an intensity modulation/direct detection radio-over-fiber (RoF) link with feedback loop. The goal is to carry out the predistortion process in a real scenario, in which the output signals are a few kilometers far from the baseband unit (BBU). First, the feedback loop is considered ideal, so the output signals are captured at the remote radio head side. Then, the feedback loop is taken into account, and both the input and output signals are captured at the BBU side. Applying optimization algorithms, such as Fibonacci, Golden, or Powell, it is possible to seek the optimal attenuation value within only a few iterations, which minimizes the distortion of the feedback loop. Experiments are carried out in a RoF system with 10 and 25 km length fiber within the long-Term evolution (LTE) standard. Measured results show how with a proper choice of the attenuation it is possible to reach analogous results regarding to an ideal feedback loop in terms of adjacent channel power ratio, the output signal power and error vector magnitude. info:eu-repo/grantAgreement/ES/DGA/GCM-T97 info:eu-repo/grantAgreement/ES/MINECO/TEC2014-58341-C4-2-R info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.627 2017 ENGINEERING, ELECTRICAL & ELECTRONIC 85 / 260 = 0.327 2017 Q2 T1 PHYSICS, APPLIED 46 / 146 = 0.315 2017 Q2 T1 OPTICS 27 / 94 = 0.287 2017 Q2 T1 0.893 2017 Electrical and Electronic Engineering 2017 Q1 Atomic and Molecular Physics, and Optics 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0001-5849-5198 Carro, P.L. Universidad de Zaragoza (orcid)0000-0002-7452-446X Garcia-Ducar, P. Universidad de Zaragoza (orcid)0000-0002-2796-5916 De Mingo, J. Universidad de Zaragoza (orcid)0000-0002-6144-7928 Salinas, I. Universidad de Zaragoza 5008 800 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Teoría Señal y Comunicac. 9, 3 (2017), 7904414 [15 pp] IEEE PHOTONICS JOURNAL IEEE PHOTONICS JOURNAL 1943-0655 8233867 http://zaguan.unizar.es/record/63037/files/texto_completo.pdf Versión publicada 59602 http://zaguan.unizar.es/record/63037/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:63037 articulos driver 2019-07-09-11:56:24 ARTICLE