Westudyanelectroniccompensator(EC)asareceiverfora100-Gb/spolarizationdivisionmultiplexingcoherentopticalorthogonalfrequencydivisionmultiplexing(PDM-CO-OFDM)systemwithoutopticaldispersioncompensation.EC,includingelectricaldispersioncompensation(EDC),leastsquareschannelestimationandcompensation(LSCEC),andphasecompensation(PC),isusedtocompensateforchromaticdispersion(CD),phasenoise,polarizationmodedispersion(PMD),andchannelimpairments,res
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