iteratively so that normalized intensities of equalized outputs converge to unity.
Using this algorithm, we can compensate for chromatic dispersion and polariza-
tion-mode dispersion simultaneously. This method is very effective for compen-
sating for time-varying dispersion values.
3.6 WAVELENGTH-DIVISION MULTIPLEXED
QUADRATURE PHASE-SHIFT KEYING
TRANSMISSION EXPERIMENTS
We report 1000-km transmission of DWDM copolarized 20-Gbit/s NRZ-QPSK
signals with high spectral efficiency of 1.05 bit/s/Hz, using a digital homodyne
receiver that has sharp cutoff characteristics relying on electrical filters for
wavelength-channel demultiplexing [18]. The use of this receiver also enables us
to investigate transmission impairments caused by self-phase modulation ...