Digital Four-Dimensional Transceiver IQ Characterization

Signal impairments caused by the relative characteristic differences and crosstalk between electrical in-phase (I) lanes quadrature (Q) are some of main obstacles to development 100-Gbaud-class high-symbol-rate transceivers. To address such IQ impairments, we propose a method for enabling fully frequency-resolved four-dimensional (4D) characterization even in presence arbitrary across four polarization-multiplexed We formulated 4D signal-propagation model that takes into account inter-polarization found how separate characteristics transmitter receiver from coefficients single-layer complex 8×2 multiple-input multiple-output adaptive equalizer on basis model. also introduce an application characterizing typical (e.g., skew, amplitude imbalance, phase deviation) filter coefficients. numerically experimentally tested our with 96-Gbaud 16QAM signals demonstrated its feasibility.