Title :
Sub-Carrier-Multiplexed Duplex 64-QAM Radio-over-Fiber Transmission for Distributed Antennas
Author :
Ghafoor, Salman ; Hanzo, Lajos
Author_Institution :
Sch. of ECS, Univ. of Southampton, Southampton, UK
fDate :
12/1/2011 12:00:00 AM
Abstract :
We demonstrate the feasibility of Radio Over Fiber (ROF) transmission of 4 Sub-Carrier Multiplexed (SCM) 64-QAM data streams to a pair of low-complexity Radio Access Units (RAUs), which form part of a virtual MIMO architecture under the control of a Central Unit (CU). The ROF signal is transmitted over low frequency RF carriers and heterodyne detection is used at the RAUs. The 4 coherent optical carriers used for data transmission as well as for heterodyning at the RAUs are generated using a single laser rather than several inevitably non-coherent lasers. Our proposed system transmits duplex data of 480 Mbit/s and 240 Mbit/s in the downlink and uplink directions, respectively at mm-wave frequencies of 25 GHz or 50 GHz.
Keywords :
MIMO communication; antennas; multiplexing; quadrature amplitude modulation; radio access networks; radio-over-fibre; MIMO architecture; RF carriers; ROF signal; bit rate 240 Mbit/s; bit rate 480 Mbit/s; central unit; data transmission; distributed antennas; frequency 25 GHz; frequency 50 GHz; heterodyne detection; radio access units; sub-carrier-multiplexed duplex 64-QAM Radio-over-fiber transmission; Optical attenuators; Optical fibers; Optical mixing; Optical modulation; Optical noise; RF signals; 64QAM; Radio-over-fiber transmission; distributed antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2011.101711.111794
