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METHOD AND APPARATUS FOR RECOVERING TIME-DOMAIN HYBRID MODULATED QAM SIGNALS
METHOD AND APPARATUS FOR RECOVERING TIME-DOMAIN HYBRID MODULATED QAM SIGNALS
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机译:时域混合调制QAM信号的恢复方法和装置
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摘要
A method for recovering a quadrature amplitude modulated (QAM) signal is disclosed. The method includes receiving a QAM signal at a demultiplexers, where the QAM signal comprises multiple modulation schemes, splitting the QAM signal into k branches, where k is the number of QAM modulation schemes of the signal, passing the branch having the lowest order QAM modulation scheme to a first equalizer for recovering and tracking polarization and compensating polarization mode dispersion (PMD), updating a tap updating algorithm with a recovery value determined by the first equalizer, and recovering and tracking polarization and compensating PMD for all other branches based on the recovery value.
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