Title :
Optically Powered Remote Units for Radio-Over-Fiber Systems
Author :
Wake, David ; Nkansah, Anthony ; Gomes, Nathan J. ; Lethien, Christophe ; Sion, Cathy ; Vilcot, Jean Pierre
Author_Institution :
Dept. of Electron., Kent Univ., Canterbury
Abstract :
Optically powered radio-over-fiber remote units have been designed and constructed for distributed antenna system applications using separate fibers for power and signal transmission. The feasibility of this approach has been investigated through a series of transmission measurements, based on the IEEE 802.11g wireless local area networking standard at a frequency of 2.5 GHz using 64-QAM OFDM modulation at 54 Mb/s. These measurements show that high-quality multilevel signal transmission is possible with modest levels of optical power at the central unit. For example, an EVM of around 3% has been achieved for an RF output power of 0 dBm using a central unit optical power of 250 mW over a link length of 300 m.
Keywords :
OFDM modulation; microwave photonics; optical fibre LAN; quadrature amplitude modulation; radio-over-fibre; wireless LAN; IEEE 802.11g wireless local area networking; QAM OFDM modulation; bit rate 54 Mbit/s; distance 300 m; distributed antenna system application; frequency 2.5 GHz; multilevel signal transmission; optically powered remote units; power 250 mW; power transmission; radio-over-fiber system; signal transmission; transmission measurement; wireless local area networks; Antenna measurements; Area measurement; Frequency measurement; Measurement standards; Optical design; Optical fiber LAN; Optical modulation; Optical network units; Signal design; Transmitting antennas; Distributed antenna systems; power over fiber; radio over fiber; wireless local area networks (WLANs);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.927171
