Proposed High Data Rate Coherent Optical OFDM WDM RoF System for Long Haul Transmission
ABSTRACT
The continuous demand for internet traffic has powered the increment in a claim for bandwidth and high data rates, using Radio over Fiber. This thesis focuses on the establishment and performance analysis of high data rate coherent optical orthogonal frequency division multiplexing integrated with radio over fiber for long haul transmission. Four scenarios have been proposed, the first scenario involves one user 4 quadrature amplitude modulation-coherent optical orthogonal frequency division multiplexing radio-over fiber with single mode fiber start length of 50km and data rate of 10Gbps until single mode fiber length of 250km before signal distortion is recognized, in the second scenario using dispersion compensation fiber with one user 4 quadrature amplitude modulation coherent optical orthogonal frequency division multiplexing radio over fiber has been investigated, thus for long-haul transmission using single mode fiber-dispersion compensation fiber the length of the channel is increased to 6600km with data rate of 10Gbps. In the third scenario, the modulation rate in the increase from 4-quadrature amplitude modulation to 16- quadrature amplitude modulation to investigate the effect of modulation rate on proposed system, thus one user with 16 quadrature amplitude modulation-coherent optical orthogonal frequency division multiplexing -radio over fiber and dispersion compensation fiber is presented for high data rates and long haul transmission. In this scenario, the proposed system has succeeded in achieving high data rate about 55Gbps with single mode fiber-dispersion compensation fiber length of 6600km before distortion detection. The fourth scenario investigates the effect of adding dense wavelength division multiplexing on system performance. Via DWDM a huge data rate can be achieved. Hence, the ultimately attained data rate is 1.65 Tbps for length 6600km single mode fiber – dispersion compensation fiber.
posted : 20-6-2017