Fiber nonlinearity mitigation by improved zero-interpolation method in coherent optical OFDM systems |
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| Authors: | Yaohong Hao Yuquan Li Rong Wang |
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| Institution: | (1) Microwave/mm-Wave and Wireless Communication Research Lab, Radio Communication Center of Excellence, Electrical Engineering Department, Amirkabir University of Technology, 424 Hafez Ave, Tehran, Iran |
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| Abstract: | An improved zero-interpolation method with signal clipping to improve fiber nonlinearity tolerance in the long-haul coherent
optical orthogonal frequency division multiplexing system (CO-OFDM) is presented. The new technique is implemented by interpolating
zero subcarriers and selecting the odd subcarriers to carry data and clipping conventional CO-OFDM signal at zero. With such
a scheme, the effect of fiber nonlinearity can be mitigated, and the wanted signal carried on odd subcarriers is orthogonal
to clipping noise, which falls on even frequencies. Simulation shows that the system Q value is improved by more than 2 dB at the length of 960 km |
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| Keywords: | coherent optical communication fiber nonlinearity signal clipping orthogonal frequency division multiplexing (OFDM) |
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