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Hybrid radio over fiber system for generation and distribution of UWB signals

Kaszubowska-Anandarajah, Aleksandra and Perry, Philip and Barry, Liam P. (2008) Hybrid radio over fiber system for generation and distribution of UWB signals. In: ICTON 2008 - 10th Anniversary International Conference on Transparent Optical Networks, 22-26 June 2008, Athens, Greece. ISBN 978-1-4244-2626-3

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Abstract

The authors investigate a hybrid radio over fiber system for the generation and distribution of UWB signals. This system is based on gain-switched laser, which is used to generate short optical pulses. The position of these pulses is modulated using electrical data before transmitting them to the remote antenna unit (RAU). At the RAU, the optical signal is detected and undergoes spectral shaping (according to UWB requirements). The resulting pulse position modulated (PPM) electrical impulses are then down-converted to baseband using an electrical mixer. After strong low pass filtering, bit error rate measurements are carried out in order to verify the performance of the system. Error free operation is achieved for optical power levels as low as -16 dBm falling at the detector in RAU. The impact of fiber transmission on the generated UWB signal is also investigated via a simulation model. The evolution of the pulse- and spectral width of the UWB pulses, as the signal travels over different lengths of fiber, is recorded. Results achieved show that the pulse- and spectral width are strongly affected by chromatic dispersion of the fiber. However, these changes can be easily reverted using standard dispersion compensation techniques.

Item Type:Conference or Workshop Item (Paper)
Event Type:Conference
Refereed:Yes
Subjects:Engineering > Optical communication
Physical Sciences > Lasers
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Electronic Engineering
Research Initiatives and Centres > Research Institute for Networks and Communications Engineering (RINCE)
Published in:2008 10th Anniversary International Conference on Transparent Optical Networks. . Institute of Electrical and Electronics Engineers. ISBN 978-1-4244-2626-3
Publisher:Institute of Electrical and Electronics Engineers
Official URL:http://dx.doi.org/10.1109/ICTON.2008.4598739
Copyright Information:©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Funders:Science Foundation Ireland
ID Code:2255
Deposited On:12 Jan 2009 12:25 by DORAS Administrator. Last Modified 07 May 2010 14:27

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