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Digital compensation of chromatic dispersion in 112 Gbit/s PDM QPSK system

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Figure

Figure 1. Schematic of the adaptive normalized least mean square filter.
Figure 2. Schematic of 112-Gbit/s PDM-QPSK coherent optical transmission system.
Figure 4. Performances of CD compensation using three digital filters neglecting fiber loss, (a) BER with OSNR using NLMS and FD-FIR filters, (b) BER with taps number using NLMS and FD-FIR filters at OSNR 14.6 dB, (c) CD equalization using blind look-up fi
Figure 5. Schematic of blind look-up adaptive filter.

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