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  • Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference
  • Technical Digest (CD) (Optica Publishing Group, 2005),
  • paper OTuL4

Unrepeated 210-km Transmission with Coherent Detection and Digital Signal Processing of 20-Gb/s QPSK Signal

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Abstract

We demonstrate an unrepeated transmission of 20-Gb/s QPSK signals over 210 km using coherent detection and digital signal processing. Phase estimation of the homodyne-detected QPSK signal improves the bit-error rate performance compared to differential demodulation.

© 2005 Optical Society of America

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