480Mbit/s UWB bi-directional radio over fiber CWDM PON using ultra-low cost and power VCSELs

Radio-over-fiber (RoF) schemes offer the possibility of permitting direct access to native format services for the domestic user. A low power requirement and cost effectiveness are crucial to both the service provider and the end user. Here, we present an ultra-low cost and power RoF scheme using direct modulation of commercially-available 1344 nm and 1547 nm VCSELs by band-group 1 UWB wireless signals (ECMA-368) at near broadcast power levels. As a result, greatly simplified electrical-optical-electrical conversion is accomplished. A successful demonstration over a transmission distance of 20.1 km is described using a SSMF, CWDM optical network. EVMs of better than-18.3 dB were achieved. © 2011 Optical Society of America

Anthroponyms in health care interventions

Nuestro objetivo es estudiar los nombres propios que los profesionales de la sanidad utilizan para referirse y dirigirse a los pacientes en la atención asistencial. Para realizar esta investigación hemos elaborado primeramente, un gran corpus de antropónimos empleados en este tipo de interacción a partir de múltiples fuentes. Seguidamente hemos analizado, clasificado, descrito y explicado los datos obtenidos. La hipótesis es que el antropónimo constituye un elemento relevante en la relación personal sanitario/ paciente pero su uso resulta complejo. Para probar esta complejidad designativa dedicamos las siguientes páginas, que hemos dividido en tres partes: introducción, análisis de cuestiones antroponímicas y conclusión.Anthroponyms in Health Care Interventions. This research aims to examine the personal names used by health care professionals to refer to and speak with patients in medical consultations. To this end, a large corpus was created with anthroponyms used in this type of settings and extracted from a variety of sources. The data obtained were then analyzed, classified, described and explained. Our hypothesis is that personal names are relevant elements in the relationship between the health care provider and the patient; however, their use is decidedly complex. In the following pages we will discuss this designative complexity by way of an introduction, an analysis of anthroponymic studies and a conclusion

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

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

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

Mujeres y hombres en la sociedad cortesana. Identidades, funciones, relaciones

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VCSEL-based, CWDM - PON systems using reflective technology for bi-directional multi-play service provision

Orthogonal frequency division multiplexing based on radio-overfiber schemes allows the direct use of multiple, native format wireless platforms. In combination with standard baseband provision such as Gigabit Ethernet, this provides access to a wide range of services without requiring specialized end-user equipment. However, such signals have a high laser power-bandwidth requirement which may not be a good fit to the domestic environment. Here we explore the use of low-power optical components in customer premises which interface with an intermediate optical network node. Two solutions in the context of SSMF over a CWDM optical network are described, based on either reflective or direct modulation. EVMs of better than 35 dB were achieved. ©2012 Optical Society of America