Architectures and Novel Functionalities for Optical Access OFDM Networks "Arquitecturas y Nuevas Funcionalidades para Redes OFDM de Acceso Óptico"

En los últimos años ha habido un gran aumento en el despliegue de redes de acceso ópticas de fibra hasta el hogar (FTTH, del inglés fibre-to-the home). FTTH es una solución flexible, una tecnología de acceso de futuro que permite proporcionar tasas de datos del orden de Gbit/s por ususario. Diversos estudios indican que FTTH se convertirá en la diferencia clave entre los operadores más importantes. Además, FTTH es la única tecnolotgía capaz de crear nuevas fuentes de ingresos de aplicaciones de alta velocidad, como por ejemple entretenimiento de alta definición (vído y juegos de alta definición...) Dede el punto de vista del operador, una de las vientajas importantes que proporciona FTTH es que permite una mayor eficiencia operativa en coparción con otras tecnologías de acceso, principalmente por la reducción de costes de mantenimiento y de operación. Además, FTTH reduce los requisitos de los equipos de las centrales. Esta tesis doctoral tiene como ojetivo extender estas ventajas más allá del concepto FTTH mediante la integración de la red óptica de distribución desplegada dentro del hogar así como el enlace radio final de corto o medio alcance inalámbrico. Esto proporciona una arquitctura de red FFTH integrada de extremo a extremo. De este modo, los beneficios de la reducción de costes operativos y mayor eficiencia se extienden hasta el usuario final de la red. En esta tesis doctoral, se propone una arqutectura de acceso integrada óptica-radio basada en la multiplexación por división ortogonal de fecuencia (OFDM, del inglés orthogonal frequency división multiplexing) para proporcionar diferentes servicios al usuario como Internet, teléfono/voz, televisión de lata definición, conexión inalámbrica y seguridad en el hogar. Las señales OFDM se utilizan en muchos estándares inalámbricos como las señales de banda ultraancha (UWB, del inglés ultra-wide band), WiMAX, LTE, WLAN, DVB-T o DAB. Estos formatos aprovechan las características intrínsecas de la modulación OFDM como su mayor inmunidad ante desvanecimiento multi-camino. Esta tesis incluye la propuesta y la demostración experimental de la transmisión simultánea y bi-direccional de señales OFDM multi-estándar en radio-sobre-fibra proporcionando servicios triple-play basados en OFDM como UWB para televisión de alta definición, WiMAX para datos de Internet, y LTE para el servicio telefónico.Morant Perez, M. (2012). Architectures and Novel Functionalities for Optical Access OFDM Networks "Arquitecturas y Nuevas Funcionalidades para Redes OFDM de Acceso Óptico" [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/15076Palanci

Performance of MB-OFDM UWB and WiMAX IEEE 802.16e converged radio-over-fiber in PON

Experimental results about the performance of converged radio-over- fiber transmission including multiband- OFDM UWB and WiMAX 802.16e wireless over a passive optical network are reported in this paper. The experimental study indicates that UWB and WiMAX converged transmission is feasible over the proposed distribution set-up employing a single wavelength. However, the results indicate that there is an EVM penalty of 3.2 dB for a UWB 10 km SSMF transmission in presence of WiMAX wireless

Joint distribution of polarization-multiplexed UWB and WiMAX radio in PON

In this paper, the feasibility of the joint distribution of ultra-wideband (UWB) and WIMAX wireless using polarization multiplexing as a coexistence technique is proposed and experimentally demonstrated within the framework of passive optical networks (PON). Four single- and orthogonal-polarization multiplexing schemes are studied targeting to reduce the mutual interference when UWB and WiMAX are distributed jointly through standard single-mode fiber (SSMF) without transmission impairments compensation techniques and amplification. Experimental results indicate successful transmission up to 25 km, in SSMF exceeding the range in typical PON deployments. The radio link penalty introduced by optical transmission is also investigated in this paper

UWB wireless coexistence by fibre-based photonic ADC interference monitoring

The interference monitoring of UWB wireless picocell clusters through an in-house fibre installation is proposed and evaluated in a proof-of-concept experiment. UWB clusters enable range extension of UWB technology providing Gbit/s communications in home or office buildings. Coexistence of a large number of UWB clusters with other wireless services is guaranteed by a photonic analog-to-digital converter employing the in-house optical fiber installation

Integrated performance analysis of UWB wireless optical transmission in FTTH networks

The optical transmission of full standard ECMA_368 OFDM_UWB signals 400 Mbit/s per single user over 50 km SSMF, and the impact of optical transmission in the radio performance experimentally analyzed in this paper

Ultra-wideband radio signals distribution in FTTH networks

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 demonstrated by the transmission of standards-based UWB signals at 1.25 Gb/s along different FTTH fiber links with 25 km up to 60 km of standard single-mode fiber length in a laboratory experiment. Experimental results suggest that orthogonal frequency-division-multiplexed UWB signals exhibit better transmission performance in FFTH networks than impulse radio UWB signals

Optical distribution of OFDM and impulse-radio UWB in FTTH networks

Proposal, experimental demonstration and performance comparison of impulse-radio UWB and OFDM UWB distribution in FTTH networks for high-definition audio/video broadcasting is presented. OFDM-UWB exhibits better performance compared with its impulse-radio counterpart with better spectral efficiency

Real-time ultra-wideband video streaming in long-reach passive optical networks with wireless radiation in the 10 and 60 GHz Bands

This paper was published in Chinese Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/col/abstract.cfm?URI=col-11-10-100605 . Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.[EN] Real-time video streaming using ultra-wideband (UWB) technology is experimentally demonstrated along long-reach passive optical networks (LR-PONs) with different wired and wireless reaches. Experimental tests using external and direct modulation with UWB wireless radiation in the 10- and 60-GHz bands are performed. An ultra-bendable fiber is also considered for a last-mile distribution. The video quality at the output of the optical fiber infrastructure of the LR-PON is assessed using the error vector magnitude (EVM), and the link quality indicator (LQI) is used as a figure of merit after wireless radiation. An EVM below -17 dB is achieved for both externally and directly modulated LR-PONs comprising up to 125 km of optical fiber. EVM improvement is observed for longer LR-PONs when directly modulated lasers (DMLs) are used because of the amplitude gain provided by the combined effect of dispersion and DML's chirp. Compared with optical back-to-back operation, the LQI level degrades to the maximum around 20% for LR-PONs ranging between 75 and 125 km of fiber reach and with a wireless coverage of 2 m in the 10-GHz UWB band. The same level of LQI degradation is observed using the 60-GHz UWB band with a LR-PON integrating 101 km of access network, a last-mile distribution using ultra-bendable fiber, and a 5.2-m wireless link.This work was supported by the Fundação para a Ciˆencia e a Tecnologia from Portugal under projects PEst-OE/EEI/LA0008/2013 and TURBO-PTDC/EEATEL/ 104358/2008 and also by the European FIVER-FP7-ICT-2009-4-249142 project.Alves, TMF.; Morant Perez, M.; Cartaxo, AVT.; Llorente Sáez, R.; Cluzeaud, P.; Sambaraju, R. (2013). Real-time ultra-wideband video streaming in long-reach passive optical networks with wireless radiation in the 10 and 60 GHz Bands. Chinese Optics Letters. 11(10):1006051-1006056. https://doi.org/10.3788/col201311.100605S10060511006056111

Transmisión y procesado óptico de señales UWB para comunicaciones por fibra óptica

[ES] En esta Tesina se propone y estudia el uso de señales de banda ultra-ancha (UWB, ultra-wide band) para su distribución en redes de fibra óptica. La técnica de modulación radio UWB es una de las más interesantes actualmente debido a su comportamiento ante coexistencia con otros servicios con y sin licencia, su baja potencia radiada, su robustez al desvanecimiento multicamino y la baja probabilidad de intercepción. La distribución de señales UWB por fibra óptica proporciona dos ventajas importantes: (a) Las redes de fibra hasta el hogar (FTTH, fiber to the home) proporcionan ancho de banda suficiente para distribuir un gran número de señales UWB. (b) No es necesaria la modulación ni la conversión en frecuencia en casa del usuario final ya que la señal viaja en su formato original. La viabilidad de la tecnología UWB-en-fibra propuesta en esta Tesina es estudiada analíticamente y demostrada experimentalmente en el laboratorio mediante la transmisión de señales UWB a 1.25 Gbit/s por diferentes enlaces de fibra FTTH donde las señales OFDM presentan mejor comportamiento que las impulse radio. La transmisión de 5 canales BPSK a 1.56 Gbit/s es demostrada experimentalmente hasta un alcance de 100 km de fibra monomodo. Los resultados indican que la configuración multicanal, la modulación empleada, y el número de portadoras piloto son factores importantes a tener en cuenta al definir los sistemas UWB-sobre-fibra. Finalmente, se demuestra la conectividad UWB proporcionando 400 Mbit/s por usuario a distancias de transmisión radio de 1.5 m tras la propagación por 10 km SSMF y de 1 m tras 25 km.[EN] In this work, the use of an ultra-wide band (UWB) radio technique is proposed as a viable solution for the distribution over optical fiber networks. UWB is one of the most promising radio modulation techniques in wireless communications. The growing interest in this technique is due to its excellent coexistence with other licensed and unlicensed wireless services, its low radiated power, tolerance to multipath fading and low probability of interception. Distribution of UWB signals on fiber exhibits two main advantages: (a) Fiber to the home (FTTH) networks provide bandwidth enough to distribute a large number of UWB signals. (b) No trans-modulation or frequency up-conversion is required at customer premises to be radiated. The approach suitability is demonstrated by the transmission of standards-based UWB signals at 1.25 Gb/s along different FTTH fiber links, where OFDM-UWB signals exhibit better transmission performance in FTTH networks than impulse radio UWB signals. Transmission of 5 BPSK-OFDM channels with an accumulated bit-rate of 1.56 Gbit/s over 100 km of SSMF is demonstrated experimentally. The results reveal multichannel configuration, OFDM modulation and the number of pilot tones as important parameters to be considered in UWB radio signals transmission over optical systems. Finally, UWB connectivity is demonstrated at 1.5 m wireless after 10 km SSMF transmission, or 1 m wireless after 50 km SSMF, providing 400 Mbit/s bitrate per user.Morant Perez, M. (2008). Transmisión y procesado óptico de señales UWB para comunicaciones por fibra óptica. http://hdl.handle.net/10251/12094Archivo delegad

Effect of multi-channel MB-OFDM UWB radio-over-fiber transmission using polarization multiplexed distribution in FTTH networks

The effect of multi-channel MB-OFDM ultra-wideband radio-over fiber transmission using polarization multiplexing is experimentally analyzed. 25 km SSMF reach is achieved with 1.2% EVM distortion when transmitting three multiplexed channels with 0.7576 Bit/s/Hz spectral efficiency