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Electrical polarisation mode dispersion (PMD) and receiver bandwidth generated intersymbol interference (ISI) mitigation using an analogue decision feedback loop for 10 Gbit/s NRZ signals is demonstrated. ISI caused by first-order PMD of up to 120 ps differential group delay was equalised. Error free recovery of signals with completely closed eye diagrams was achieved.
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Möller et al. (1999) studied this question.
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