Design of Optical-Wireless IR-UWBoF Systems with Spectral Line Suppression Capabilities

Impulse-Radio Ultra-Wide Band (IR-UWB) over Fiber (IR-UWBoF) has been proposed to interconnect IR-UWB-based deployments separated by hundreds of meters or even kilometers. IR-UWB transmissions must comply with spectral masks provided by radio spectrum regulatory agencies. The maximum transmit power of an IR-UWB signal is adversely affected by the presence of spectral lines in its Power Spectral Density (PSD). Thus, it is desirable that the PSD of signals generated by IR-UWBoF systems does not show spectral lines. Previous works have shown the feasibility of deploying of optical-wireless IR-UWBoF systems. However, most of these proposals report PSDs showing spectral lines. To the best of our knowledge, spectral line suppression has not been previously studied for optical-wireless IR-UWBoF systems. This work shows the design and implementation of optical-wireless IR-UWBoF systems generating signals with Spectral Line-Free (SLF) PSDs. The proposal considers the use the use of a specifically designed convolutional code combined with Binary Phase Shift Keying (BPSK) or Quaternary Biorthogonal Pulse Position Modulation (Q-BOPPM) to provide a SLF PSD in IR-UWBoF systems. A testbed consisting of 30 km of single-mode optical fiber (SMF) concatenated to a 20 cm wireless link was physically implemented. The results show that a SLF PSD is achieved for both the optical and the wireless transmissions, even when the binary data source feeding the system is not perfectly random

Design of Optical-Wireless IR-UWBoF Systems with Spectral Line Suppression Capabilities

Impulse-Radio Ultra-Wide Band (IR-UWB) over Fiber (IR-UWBoF) has been proposed to interconnect IR-UWB-based deployments separated by hundreds of meters or even kilometers. IR-UWB transmissions must comply with spectral masks provided by radio spectrum regulatory agencies. The maximum transmit power of an IR-UWB signal is adversely affected by the presence of spectral lines in its Power Spectral Density (PSD). Thus, it is desirable that the PSD of signals generated by IR-UWBoF systems does not show spectral lines. Previous works have shown the feasibility of deploying of optical-wireless IR-UWBoF systems. However, most of these proposals report PSDs showing spectral lines. To the best of our knowledge, spectral line suppression has not been previously studied for optical-wireless IR-UWBoF systems. This work shows the design and implementation of optical-wireless IR-UWBoF systems generating signals with Spectral Line-Free (SLF) PSDs. The proposal considers the use the use of a specifically designed convolutional code combined with Binary Phase Shift Keying (BPSK) or Quaternary Biorthogonal Pulse Position Modulation (Q-BOPPM) to provide a SLF PSD in IR-UWBoF systems. A testbed consisting of 30 km of single-mode optical fiber (SMF) concatenated to a 20 cm wireless link was physically implemented. The results show that a SLF PSD is achieved for both the optical and the wireless transmissions, even when the binary data source feeding the system is not perfectly random

Low complexity M-PPM impulse-radio ultra wideband over fiber system for wireless sensor networks applications

International audienceUltra wideband over fiber (UWBoF) systems have been proposed to extend wireless range and to interconnect stand‐alone UWB networks. These systems have focused on high‐data‐rate applications. However, UWB will be a key enabler for low‐data‐rate wireless sensor network (WSN) deployments. In this letter, a low‐cost and low‐complexity M‐ary pulse position modulation (PPM) impulse radio (IR)‐UWBoF system designed for WSNs applications is proposed. A spectral line‐suppressive convolutional code is used to achieve spectral line suppression in the power spectral density (PSD). Experimental results show that the system does not distort or add spectral lines to the IR‐UWB signal PSD transmitted over 30 km of a single‐mode fiber, thus demonstrating its feasibility to interconnect WSN deployment

Desarrollo de una cama de pruebas experimental para sistemas IR-UWBoF-IM/DD basándose en el uso de la plataforma de simulación VPIphotonics

International audienceIn this work we describe the design of an Impulse-Radio Ultra-Wide band over Fiber (IR-UWBof) system implemented on the VPtransmissionMaker TM simulation software. This IR-UWBoF system uses the simple and low cost intensy external modulation with direct detection (IM/DD) technique to transmit IR-UWB signals at 1 Gbps of data rate through a standard single mode optical fiber (SSMF) link. We validate our proposal by means of a comparative analysis between the Power Spectral Density (PSD) of IR-UWB signals generated by simulation and the PSDs of signals obtained by an experimental IR-UWBoF IM/DD system. The maximum bandwidth of the proposed system is 10 GHz, which is determined by the frequency response of the electro-optic modulator and the electric devices used. The analysis of results show that the simulated IR-UWBoF system can be used as an experimental testbed to analyze and to evaluate IR-UWB transmissions through optical fiber links in a fast and accurate mannerEn este trabajo se describe el diseno de un sistema denomanido radio impulsivo de ancho de banda ultra amplio sobre fibra optica (IR-UWBoF) implementado en la plataforma de simulacon BPItransmissionMaker de la compania VPIphotonics. El sistema propuesto utiliza la tecnica de modulacion de intensidad de un laser DFB de onda continua (CW) con deteccion directa (IM/DD) para transmitir senales IR-UWB con una tasa de transferencia de 1 Gbps a traves de un enlace de fibra optica monomodo estandar (SSMF) La validez del esquema implementado en simulacion ha sido confirmada mediante un analisis comparativo entre la densidad espectral de potentia (PSD) de senales IR-UWB obtenidas en el simulador con respecto a la PSD del mismo tipo de senales entregadas por un sistema experimental IR-UWBoF IMM/DD. El ancho de banda maximo del sistema experimental es de 10 GHz y esta determinado por la respuesta en frecuencia del modulador electro-optico y los componentes electricos utilizados. El resultado del an alisis comparativo muestra que el sistema propuesto en simulacion puede ser usado como una cama de pruebas experimental en donde se pueden analizar y evaluar transmissiones de sina les IR-UWB a traves de enlaces SSMF de una forma rapida y precis

Desarrollo de una cama de pruebas experimental para sistemas IR-UWBoF-IM/DD basándose en el uso de la plataforma de simulación VPIphotonics

International audienceIn this work we describe the design of an Impulse-Radio Ultra-Wide band over Fiber (IR-UWBof) system implemented on the VPtransmissionMaker TM simulation software. This IR-UWBoF system uses the simple and low cost intensy external modulation with direct detection (IM/DD) technique to transmit IR-UWB signals at 1 Gbps of data rate through a standard single mode optical fiber (SSMF) link. We validate our proposal by means of a comparative analysis between the Power Spectral Density (PSD) of IR-UWB signals generated by simulation and the PSDs of signals obtained by an experimental IR-UWBoF IM/DD system. The maximum bandwidth of the proposed system is 10 GHz, which is determined by the frequency response of the electro-optic modulator and the electric devices used. The analysis of results show that the simulated IR-UWBoF system can be used as an experimental testbed to analyze and to evaluate IR-UWB transmissions through optical fiber links in a fast and accurate mannerEn este trabajo se describe el diseno de un sistema denomanido radio impulsivo de ancho de banda ultra amplio sobre fibra optica (IR-UWBoF) implementado en la plataforma de simulacon BPItransmissionMaker de la compania VPIphotonics. El sistema propuesto utiliza la tecnica de modulacion de intensidad de un laser DFB de onda continua (CW) con deteccion directa (IM/DD) para transmitir senales IR-UWB con una tasa de transferencia de 1 Gbps a traves de un enlace de fibra optica monomodo estandar (SSMF) La validez del esquema implementado en simulacion ha sido confirmada mediante un analisis comparativo entre la densidad espectral de potentia (PSD) de senales IR-UWB obtenidas en el simulador con respecto a la PSD del mismo tipo de senales entregadas por un sistema experimental IR-UWBoF IMM/DD. El ancho de banda maximo del sistema experimental es de 10 GHz y esta determinado por la respuesta en frecuencia del modulador electro-optico y los componentes electricos utilizados. El resultado del an alisis comparativo muestra que el sistema propuesto en simulacion puede ser usado como una cama de pruebas experimental en donde se pueden analizar y evaluar transmissiones de sina les IR-UWB a traves de enlaces SSMF de una forma rapida y precis