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Listar por autor "Beltrán Ramírez, Marta"

Mostrando ítems 1-19 de 19

42.13 Gbit/s 16QAM-OFDM photonics-wireless transmission in 75-110 GHz band

Deng, Lei; Liu, Deming; Pang, Xiaodan; Zhang, Xu; Arlunno, Valeria; Zhao, Ying; Caballero, Antonio; Dogadaev, Anton; Yu, Xianbin; Monroy, Ildefonso Tafur; Beltrán, Marta; Llorente Sáez, Roberto (EMW Publishing, 2012)

[EN] We present a simple architecture for realizing high capacity W-band (75-110 GHz) photonics-wireless system. 42.13 Gbit/s 16QAM-OFDM optical baseband signal is obtained in a seamless 15 GHz spectral bandwidth by using ...
60 GHz Radio Over Fiber System Based on Gain-Switched Laser

Shao, Tong; Beltrán, Marta; Zhou, Rui; Anandarajah, Prince M.; Llorente, Roberto; Barry, Liam P. (Institute of Electrical and Electronics Engineers (IEEE), 2014-10-15)

A radio over fiber (RoF) transmission system based on a gain-switched laser as an optical comb source is proposed and demonstrated. 12.5 Gb/s 16 quadrature amplitude modulation (16 QAM) signal generation and transmission ...
Centralized Optical-Frequency-Comb-Based RF Carrier Generator for DWDM Fiber-Wireless Access Systems

Pang, Xiaodan; Beltrán, Marta; Sánchez Vílchez, José Manuel; Pellicer, Eloy; Olmos, J. J. Vegas; Llorente Sáez, Roberto; Monroy, Idelfonso Tafur (Institute of Electrical and Electronics Engineers (IEEE), 2014-01-01)

[EN] In this paper, we report on a gigabit capacity fiber-wireless system that enables smooth integration between high-speed wireless networks and dense wavelength-division-multiplexing (DWDM) access networks. By employing ...
Combined single-mode/multimode fiber link supporting simplified in-building 60-GHz gigabit wireless access

Pham, Tien-Thang; Lebedev, Alexander; Beltrán, Marta; Yu, Xianbin; Llorente Sáez, Roberto; Monroy, Idelfonso Tafur (Elsevier, 2012-07)

In this paper, we propose and experimentally demonstrate a simple, cost-effective hybrid gigabit fiber-wireless system for in-building wireless access. Simplicity and cost-effectiveness are achieved in all parts of the ...
Dual Photonic Generation Ultrawideband Impulse Radio by Frequency Shifting in Remote-Connectivity Fiber

Beltrán Ramírez, Marta; Llorente Sáez, Roberto (Institute of Electrical and Electronics Engineers (IEEE), 2011)

[EN] An impulse-radio ultrawideband (UWB) photonic generation technique based on frequency shifting in the remote connectivity fiber in optical access networks is proposed and analyzed in this paper. This technique is based ...
DVB-S2 and DVB-T RF Transmission in 1-mm GI-POF System

Beltrán Ramírez, Marta; Cabezón, Xabier; Campo, Miguel A.; Trueba, Roberto; Lekue, Antonio; Pac, Jose M.; Cortés, Francisco J.; Llorente Sáez, Roberto (Institute of Electrical and Electronics Engineers (IEEE), 2014-08-15)

An optical system for the transmission of digital video broadcasting (DVB) signals is proposed and experimentally demonstrated. The transmission media comprises 1-mm diameter graded-index plastic optical fiber (GI-POF) ...
Estabilidad de fuentes supercontinuum: Análisis y aplicaciones

Beltrán Ramírez, Marta (Universitat Politècnica de València, 2011-11-02)

[ES] El trabajo aquí presentado trata el fenómeno SuperContinuum (SC), que se presenta y analiza en sus aplicaciones a nivel de investigación, centrándose en convertidores A/D fotónicos (PADC). Esta aplicación SC se ...
Experimental analysis of 60-GHz VCSEL and ECL photonic generation and transmission of impulse-radio Ultra-Wideband signals

Beltrán Ramírez, Marta; Jensen, Jesper Bevensee; Llorente Sáez, Roberto; Monroy, Idelfonso Tafur (Institute of Electrical and Electronics Engineers (IEEE), 2011-08-01)

[EN] Optical generation of impulse-radio ultra-wideband (UWB) signals in the 60-GHz band is proposed and experimentally demonstrated. External-cavity laser (ECL) and vertical-cavity surface-emitting laser (VCSEL) is employed ...
Feasibility Study and Experimental Verification of Simplified Fiber-Supported 60-GHz Picocell Mobile Backhaul Links

Lebedev, Alexander; Pang, Xiaodan; Vegas Olmos, Juan Jose; Beltrán Ramírez, Marta; Llorente Sáez, Roberto; Forchhammer, Soren; Tafur Monroy, Idelfonso (Institute of Electrical and Electronics Engineers (IEEE), 2013-08)

We propose and experimentally demonstrate a fiber-wireless transmission system for optimized delivery of 60-GHz radio frequency (RF) signals through picocell mobile backhaul connections. We identify advantages of 60-GHz ...
Fiber Wireless Transmission of 8.3-Gb/s/ch QPSK-OFDM Signals in 75-110-GHz Band

Deng, Lei; Beltrán Ramírez, Marta; Pang, Xiaodan; Zhang, Xu; Arlunno, Valeria; Zhao, Ying; Caballero, Antonio; Dogadaev, Anton; Yu, Xianbin; Llorente Sáez, Roberto; Liu, Deming; Monroy, Idelfonso Tafur (Institute of Electrical and Electronics Engineers (IEEE), 2012-03)

[EN] In this letter, we present a scalable high-speed W-band (75-110-GHz) fiber wireless communication system. By using an optical frequency comb generator, three-channel 8.3-Gb/s/ch optical orthogonal frequency-division ...
In-home networks integrating high-capacity DMT data and DVB-T over large-core GI-POF

Beltrán Ramírez, Marta; Shi, Y.; Okonkwo, C.; Llorente Sáez, Roberto; Tangdiongga, E .; Koonen, T. (Optical Society of America, 2012)

[EN] The low-cost in-home distribution of full-standard digital TV jointly with high-bitrate data using 50 m long 1 mm core diameter gradedindex plastic optical fiber (GI-POF) is proposed and experimentally demonstrated. ...
Optimization of high-definition video coding and hybrid fiber-wireless transmission in the 60 GHz band

Lebedev, A.; Pham, T.T.; Beltrán Ramírez, Marta; Yu, X.; Ukhanova, A.; Llorente Sáez, Roberto; Monroy, I.T.; Forchhammer, S. (Optical Society of America, 2011)

[EN] The paper addresses the problem of distribution of highdefinition video over fiber-wireless networks. The physical layer architecture with the low complexity envelope detection solution is investigated. We present ...
Performance of a 60-GHz DCM-OFDM and BPSK-Impulse ultra-wideband system with radio-over-fiber and wireless transmission employing a directly-modulated VCSEL

Beltrán, Marta; Jensen, Jesper Bevensee; Yu, Xianbin; Llorente, Roberto; Rodes, Roberto; Ortsiefer, Markus; Neumeyr, Christian; Monroy, Idelfonso Tafur (Institute of Electrical and Electronics Engineers (IEEE), 2011-06-06)

[EN] The performance of radio-over-fiber optical transmission employing vertical-cavity surface-emitting lasers (VCSELs), and further wireless transmission, of the two major ultra-wideband (UWB) implementations is reported ...
Photonic Techniques for Next-Generation Integrated Optical Networks Based on Ultra-Wideband Radio / Técnicas Fotónicas para Redes Ópticas Integradas de Próxima Generación Basadas en Radio de Banda Ultra Ancha

Beltrán Ramírez, Marta (Universitat Politècnica de València, 2012-05-10)

La presenta Tesis Doctoral encuentra su ámbito de aplicación en redes de acceso ópticas de fibra hasta el hogar o FTTH (del inglés fibre-to-the-home). Las redes FTTH han sido ampliamente desplegadas en todo el mundo y se ...
Radio-over-fibre technologies arising from the Building the future Optical Network in Europe (BONE) project

Parker, M.C.; Walker, S. D.; Llorente, Roberto; Morant, María; Beltrán, Marta; Möllers, I.; Jäger, D.; Vázquez, C.; Montero, D.; Librán, I.; Mikroulis, S.; Karabetsos, S.; Bogris, A. (Institution of Electrical Engineers, 2010)

[EN] This study describes a wide range of salient radio-over-fibre system issues. Impulse radio and multiband ultra-wideband signal distribution over both single-mode fibre and multi-mode fibre (MMF) implementations are ...
Reconfigurable multiwavelength source based on electrooptic phase modulation of a pulsed laser

Beltrán Ramírez, Marta; Caraquitena Sales, José; Llorente Sáez, Roberto; Martí Sendra, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2011-08-15)

[EN] A reconfigurable multiwavelength source based on time-domain electrooptic phase modulation of a pulsed laser is proposed and experimentally demonstrated. The technique permits great reconfiguration in the spectrum ...
Single- and multiband OFDM photonic wireless links in the 75-110 GHz band employing optical combs

Beltrán Ramírez, Marta; Deng, Lei; Pang, Xiaodan; Zhang, Xu; Arlunno, Valeria; Zhao, Ying; Yu, Xianbin; Llorente Sáez, Roberto; Liu, Deming; Monroy, Idelfonso Tafur (Institute of Electrical and Electronics Engineers (IEEE), 2012-10)

[EN] The photonic generation of electrical orthogonal frequency-division multiplexing (OFDM) modulated wireless signals in the 75110 GHz band is experimentally demonstrated employing in-phase/quadrature electrooptical ...
Spectral self-imaging effect by time-domain multilevel phase modulation of a periodic pulse train

Caraquitena Sales, José; Beltrán, Marta; Llorente, Roberto; Martí Sendra, Javier; Muriel, Miguel A. (Optical Society of America, 2011)

[EN] We propose and analyze a novel (to our knowledge) approach to implement the spectral self-imaging effect of optical frequency combs. The technique is based on time-domain multilevel phase-only modulation of a periodic ...
Ultra-Wideband Radio Signals Distribution in FTTH Networks

Llorente, R.; Alves, T.; Morant, M.; Beltran, M.; Perez, J.; Cartaxo, A.; Martí Sendra, Javier (Institute of Electrical and Electronics Engineers, 2008)

[EN] The use of an ultra-wideband (UWB) radio technique is proposed as a viable solution for the distribution of high-definition audio/video content in fiber-to-the-home (FTTH) networks. The approach suitability is ...