Joint Equalization of RSOP and PMD Impairments Based on Square-root Cubature Kalman Filter for PDM-16QAM System

Joint equalization of fast RSOP and large PMD based on RD-EKF for PDM-MQAM system

“…2.1 Model of New-RSOP and New-PMD For the combined effect of RSOP and PMD in a fiber channel, it was proven in the work 6,8 that this model can be simplified as a new PMD with the new principal state of polarization (PSP) and the same differential group delay (DGD) combined with a new RSOP (New-RSOP + New-PMD). The matrix of Eqs.…”

“…7 More recently, there has been a researcher who carried out joint equalization of fast RSOP and large PMD based on the cubature Kalman filter (CKF). 8 These studies have demonstrated a commendable compensation effect of EKF in low modulation formats. However, a pertinent challenge arises with the escalation of modulation format orders, wherein the computational complexity of these methods experiences a sharp increase.…”

“…As a promising method, many methods based on Kalman filter have been proposed to cope the polarization impairments. [5][6][7][8][9][10][11] In 2016, a joint multi-polarization-effect tracking and equalization method based on two extended Kalman filters (EKF) was proposed. This method can cope with state of polarization (SOP) tracing, polarization demultiplexing, equalization for polarization dependent loss, and PMD in PDM-M-QAM coherent optical communication system.…”