Pulse or digital communications – Equalizers
Reexamination Certificate
2004-03-08
2008-01-01
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Equalizers
C375S346000, C375S350000, C375S348000, C398S065000, C398S149000, C398S205000, C398S209000, C398S213000
Reexamination Certificate
active
07315575
ABSTRACT:
A method is provided for an equalization strategy for compensating channel distortions in a dual-polarization optical transport system wherein the received signal includes a complex signal of a first transmitted polarization component and a complex signal of a second transmitted polarization component. In a first step, a blind self recovery mode used a blind adaptation algorithm in calculating and modifying multiple complex equalizer transfer function coefficients to enables recovery of only the complex signal of the first transmitted polarization component. In a second step, equalization is performed in a training mode for recovery of the complex signals of the first and second transmitted polarization components. In a third step, equalization is performed in a data directed mode. The method is suited for a digital signal processing implementation in a coherent receiver.
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Sun Han
Wu Kuang Tsan
Borden Ladner Gervais LLP
Fan Chieh M.
Fotakis Aris
Measures Jeffrey M.
Nortel Networks Limited
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