A Review on analysis of Non-linearities & Dispersion reduction techniques in O-OFDM system.

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Harmanjot Singh
Daljeet Kaur


The growing requirement for various services and the rapidly expansion of the Internet are producing the development of high channel capacity and flexible optical communication networks. Orthogonal Frequency Division Multiplexing (OFDM) is a multiplexing technique in optical communication as it belongs to multicarrier modulation which carries the data information over many subcarriers to achieving high data rate without inter–symbol interference. Advantage of optical orthogonal system is spectrum efficiency and channel robustness. In this presented paper review of multiple techniques used to improve the performance of optical OFDM communication systems in long haul fiber optic channels such as Multi Carrier – Code Division Multiplexing Access (MC-CDMA), Single Sideband Subcarrier-Multiplexed Dense-Wavelength-Division-Multiplexing (SSB/SCM/DWDM) and Multiple Optical Phase Conjugate (OPC) etc. To overcome the transmission impairments several dispersion methods such as dispersion effects chromatic and polarization mode dispersion (CMD, PMD) are presented for increasing spectral efficiency.


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