Performance of LMS Based Adaptive Filtering in Coherent Optical Receivers in Presence of State-of-Polarization Transients, PDL and ROADMs

An Analytical Model for SNR Prediction in Coherent Systems after generic Jones Matrices

“…In fact, many modern optical core network planning tools [4] are today based on equivalent linear models where it can be useful to consider polarization and frequency dependence. Just as an example, this can be true in analysis considering generic (possibly polarization dependent) Reconfigurable Optical Add-Drop Multiplexers (ROADMs) [11] with realistic (i.e. non ideal) transfer functions.…”

Adaptive Filtering in Optical Coherent Flexible Bit-Rate Receivers in the Presence of State-of-Polarization Transients and Colored Noise

“…In [6], the authors studied the tracking performance of LMSadaptive algorithm with QPSK modulation format, operating at 100 Gb/s line rate, in the presence of fast SOP and PDL. In [61], the authors looked at only LMS algorithm in flexible data-rate coherent transceivers.…”

“…(1) Study of SOP tracking in the context of flexible bitrate optical transceivers with practical hardware limitation (2) Illustrating the tradeoff when equalizing static versus fast variant channel, i.e., back-to-back RSNR and PDL penalties versus SOP tracking penalty. (3) Presenting analysis and simulation, in both convergence and steady states, to compare the performance of LMS versus NLMS, MMA, and RLS in the presence of colored noise (PDL and Filtering) and SOP transients e work presented in this paper is an extension of the work presented in [6]. e work presented in [6] focuses on the RSNR penalty when the LMS algorithm is used to correct for SOP, PDL, and ROADM filtering effects in dual-polarized networks using QPSK modulation.…”

“…(3) Presenting analysis and simulation, in both convergence and steady states, to compare the performance of LMS versus NLMS, MMA, and RLS in the presence of colored noise (PDL and Filtering) and SOP transients e work presented in this paper is an extension of the work presented in [6]. e work presented in [6] focuses on the RSNR penalty when the LMS algorithm is used to correct for SOP, PDL, and ROADM filtering effects in dual-polarized networks using QPSK modulation. e data rate is fixed, and the results are presented as an RNSR penalty for a given SOP rate and PDL level.…”

“…e results are presented in terms of maximum SOP rates that can be tracked by the different algorithms for a given RSNR penalty and for different levels of PDL and number of ROADMs. erefore, this work is a much more comprehensive study of the use of adaptive filters in dual-polarized coherent networks in the presence of fast SOP transients, PDL, and ROADM filtering effects than [6].…”