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System, method and apparatus for channel estimation with dual polarization training symbols for coherent optical OFDM
System, method and apparatus for channel estimation with dual polarization training symbols for coherent optical OFDM
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机译:用于相干光OFDM的具有双极化训练符号的信道估计的系统,方法和装置
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摘要
System, apparatus and method of optical communication are provided for performing channel estimation for an optical OFDM system by utilizing correlated dual-polarization training symbols (CDPTS) to offer high system tolerance to fiber nonlinear effects such as cross-phase modulation (XPM) among wavelength-division multiplexed (WDM) channels. An exemplary method includes receiving a pair of dual-polarization or polarization-multiplexed training symbols in an optical polarization-division multiplexed (PDM) orthogonal frequency-division multiplexed (OFDM) signal, and performing channel estimation to obtain an estimated channel matrix for at least a first of a plurality of subcarriers of the PDM-OFDM signal. Channel compensation is performed based on the estimated channel matrix for at least the first subcarrier of the OFDM signal and symbols then decoded.
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