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Description
The deployment of wireless systems, such as 3G mobile phone and wireless
LAN services, and the increase of FTTH network subscribers drives future broadband access
networks to accommodate both fixed and mobile services. In this example, we show the
integration of Fiber-To-The-Home supporting digital data and analog video services, and a
mobile WiMAX Radio-over-Fiber access network.
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Typical Results
The setup of the simulated network is displayed in
.
At the OLT, the RF signal is composed of a set of digital channels, 77 analog CATV carriers and a
WiMAX transmitter. All services are transmitted over a common optical fiber link.
shows the spectra of the transmitted and received electrical signals.
The distribution of the signal
is realized by a 1:8 power splitter. Following it, a power attenuator is used to simulate a second
splitting stage. Several characteristics of the detected signal can be analyzed. For example, the curves
in
show the Symbol Error Rate (SER) of Channel 1 and Error Vector Magnitude (EVM) of Channel 2 as functions
of the number of users for several amplification values. It can be observed how an increasing number of
users would require extra amplification to maintain the system performance.
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Further Information
Keywords: Broadband access network, Radio-over-Fiber (RoF), Fiber-To-The-Home (FTTH), Error Vector Magnitude (EVM), Symbol Error Rate (SER), Cable Television (CATV)
Similar demonstrations are available in VPItransmissionMaker Optical Systems and on the VPIphotonics Forum.
[1] Y. Horiuchi et.al, proceedings ECOC 2007, paper 1.1.6, 2007
[2] T. H. Wood et.al, PTL, vol.11 no.4, 1999
