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Danish RAFIQUE Jian ZHAO Andrew D. ELLIS
We investigate electronic mitigation of linear and nonlinear fibre impairments and compare various digital signal processing techniques, including electronic dispersion compensation (EDC), single-channel back-propagation (SC-BP) and back-propagation with multiple channel processing (MC-BP) in a nine-channel 112 Gb/s PM-mQAM (m=4,16) WDM system, for reaches up to 6,320 km. We show that, for a sufficiently high local dispersion, SC-BP is sufficient to provide a significant performance enhancement when compared to EDC, and is adequate to achieve BER below FEC threshold. For these conditions we report that a sampling rate of two samples per symbol is sufficient for practical SC-BP, without significant penalties.
This paper presents our experimental results in transmission of MB34 coded signal at the rate of 9.95 Gb/s over the conventional single mode fiber. The test results showed considerable improvement in receiver sensitivity, signal-to-noise-ratio (SNR), and timing margin with MB34.