OFDM Signal Improvement Using Radio over Fiber for Wireless System

Orthogonal frequency division multiplexing (OFDM) as a modulation technology, it transmit over both wireless and optical channel, and it distribute the data over a large number of subcarrier can be overlapping. It achieved RF signal for the long haul transmission using RoF system. The RoF (Radio over Fiber) system is referred to increase the high orthogonality of the OFDM modulation signal for the wireless network. It used for the next generation both fixed and mobile network. OFDM for wireless along with RoF can be used for short distance and long backhaul network with high data transmission. This paper we present the new model up-converting 10 Gb/s OFDM signal on 7.5 GHz carrier frequency over 60 km SMF was applied for the modulation such as QAM. The result RF signal bandwidth is increase for wireless network and this model execute from optisystem simulation software. Keywords-OFDM, RoF, RF,Radio over Fiber, WiMax, WDM.