Method and system for unbalance separation and monitoring of transceivers with transparent modulation format
A modulation format and transceiver technology, applied in the field of optical communication, can solve the problems of poor robustness, performance degradation, indistinguishability, etc., and achieve the effects of wide measurement range and modulation format, strong noise, and multiple monitoring dimensions
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[0073] In order to meet the application requirements of elastic optical networks, the present invention discloses a transceiver imbalance separation and monitoring method with transparent modulation format. The present invention is applicable to a heterodyne coherent monitoring system using square QAM modulation format, which can separate and monitor Rx and The in-phase and quadrature components (In-phase / quadrature, IQ) and X-polarization and Y-polarization (x-polarization / y-polarization, XY) of Tx are unbalanced. Imbalances that can be monitored include: IQ magnitude / phase imbalance and clock skew; XY magnitude imbalance and clock skew. The invention utilizes the natural frequency offset in the system to separate the IQ imbalance of the transceiver, and uses a polarization scrambler to introduce continuous polarization rotation to separate the XY imbalance of the transceiver. The present invention uses Schmidt quadrature method (Gram-Schmidt orthogonalization procedure, GSOP...
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