CA1104693A - Modified duobinary repeatered span line - Google Patents
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For pairs N symbol Rl and R2, the phase angle is estimated frequency offset due to The method according to claim 1, further comprising: The method according to claim 2, wherein the rotating operation is performed during the recovery phase of the operation signal.
The method according to claim 1, wherein said three-mode constellation symbols include Kitakyushu quadrature amplitude modulation constellation. The apparatus according to modified duobinary signaling remembrance 8, wherein the frequency offset estimator comprises a rotator.
The apparatus according to claim 8, wherein said phase restorer comprises a rotator. The apparatus of claim 11, further comprising: The apparatus of claim 12, wherein the means for estimating carrier frequency offset means includes means for rotating. The apparatus of claim 12, wherein said means for restoring the phase of the signal comprises means for rotation. The apparatus of claim 11, wherein said three-mode constellation symbols include Kitakyushu quadrature amplitude modulation constellation.
CN CNB en. Reception of 2-subcarriers coherent orthogonal frequency division multiplexed signals. Optical receiver for quadrature-phase-shift-keying and quadrature-duobinary signals.
I-Q quadrature modified duobinary signaling remembrance transmitter and its device and method for monitoring I-Q phase deviation.
Method and system for optical orthogonal frequency division multiplexing with companding transform. Method and system for optical orthogonal frequency division multiplexing with hadamard transform combined with companding transform. Optical ofdm modified duobinary signaling remembrance and an optical transmission system and subcarrier separation circuit and subcarrier separation method.
Complexity reduced feed forward carrier modified duobinary signaling remembrance methods for M-QAM modulation formats. A digital modulation method and device, especially an optical digital modulation method and device. Method and apparatus for pre-equalization and post equalization in an optical communication system.
Optical communication based on polarization dependent coherent optical Nyquist frequency division multiplexing. Transmission and reception of quad-subcarrier orthogonal frequency division multiplexed signals. Optical field receiver, optical multilevel signal receiver, and optical transmission system. Constrained continuous phase modulation and demodulation in an optical communications system.
Low-complexity and phase noise tolerant carrier phase estimation for dual-polarization QAM systems. Wavelength division multiplexed optical communication system having variable channel spacings and different modulation formats. Turn-up and long term operation of adaptive equalizer in optical transmission systems.