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Variable step size LMS adaptive filter for digital chromatic dispersion compensation in PDM QPSK coherent transmission system

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Figure

Fig. 1. Schematic of LMS and variable-step-size LMS adaptive filters
Fig. 3. Tap weights of LMS adaptive filter (Tap orders are centralized), (a) Magnitudes of tap weights in LMS filter, (b) Real parts of tap weights in LMS filter, (c) Imaginary parts of tap weights in LMS filter
Fig. 6. Tap weights of variable-step-size LMS adaptive filter (Tap orders are centralized), (a) Magnitudes of tap weights in VLMS filter, (b) Real parts of tap weights in VLMS filter, (c) Imaginary parts of tap weights in VLMS filter
Fig. 7. CD compensation using LMS and variable-step-size LMS adaptive filters (neglecting fiber loss)

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