Abstract
Polarization-diverse coherent demodulation allows to compensate large
values of accumulated linear distortion by digital signal processing. In particular,
in uncompensated links without optical dispersion compensation, the parameter
of the residual chromatic dispersion (CD) is vital to set the according digital
filtering function. We present different non-data-aided (blind) CD estimation
methods for single-carrier transmission under implementation constraint conditions
such as bandwidth limitation and sampling rate. The estimation performance
for various modulation formats is compared with respect to precision and robustness
for a wide range of combined channel impairments.
© 2011 IEEE
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