Transmitter IQ skew calibration in coherent transceivers based on DSP
Pavel Skvortcov, Christian Sánchez, Ian Phillips, W. Forysiak · Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF) · 2018
A calibration technique for transmitter in-phase/quadrature skews based on signal image spectrum measurement performed by DSP is proposed. Sub-picosecond accuracy of the technique is shown in numerical simulations and experiment.