A linewidth-tolerant two-stage CPE using a new QPSK-partitioning approach and an enhanced maximum likelihood detection for 64-QAM coherent optical systems

Y Chen, XG Huang - Journal of Lightwave Technology, 2015 - ieeexplore.ieee.org
… mate phase noise in the moving centered averaging window. … -stage carrier phase recovery
algorithm for 16-QAM coherent … three-stage carrier phase estimation algorithm for 16-QAM

Hardware optimization of dual-stage carrier-phase recovery for coherent optical receivers

CS Martins, FP Guiomar, AN Pinto - OSA Continuum, 2021 - opg.optica.org
… communication system performance using 16-QAM, 64-QAM, … quadrature phase-shift keying
(QPSK) partitioning approach … test phases, the angle interval and the moving average filter …

[HTML][HTML] Improved carrier phase recovery for high-capacity optical communication systems with high-order modulation formats

Y Zhang, T Liu, C Jin, T Xu, M Tan, J Zhao, T Xu - Optics Communications, 2024 - Elsevier
… In this work, we have further improved the QPSK partition … , within a sliding window, conform
to the QPSK modulation format … and averaging Y ( n ) 4 within each CPR sliding window can …

[图书][B] PERFORMANCE OF QAM SYSTEM WITH CONVOLUTIONAL CODES

K Pranathi, MV Lakshmi - books.google.com
… signal, but the carrier phase values at the beginning of each … proto type 200 M bit/s 16-QAM
system. They used differential … mean average energy were required (eg unit average energy…

On the performance of all-optical OFDM based PM-QPSK and PM-16QAM

J Hoxha, S Shimizu, G Cincotti - Telecommunication Systems, 2020 - Springer
… For phase noise estimation a joint feed-forward carrier phase … FFCPE scheme for PM-16-QAM
can tolerate laser linewidth … Following the Savory method [48], we find an average energy …

Analysis of chromatic dispersion compensation and carrier phase recovery in long-haul optical transmission system influenced by equalization enhanced phase noise

T Xu, G Jacobsen, S Popov, J Li, S Sergeyev… - Optik, 2017 - Elsevier
… the quadrature phase shift keying (QPSK), the 16-QAM and the … , such as constellation
partitioning and symbol classification, … average and the Viterbi-Viterbi algorithms require the use of …

Digital signal processing for laser phase noise compensation in high-capacity digital coherent transmission systems

Y Gao - 2015 - theses.lib.polyu.edu.hk
… three advanced carrier phase recovery techniques that are … move from QPSK to higher order
QAM formats (eg 16-QAM) … of the sliding average of twice estimated phase noise is proposed…

400 Gbit/s single-carrier and 1 Tbit/s three-carrier superchannel signals using dual polarization 16-QAM with look-up table correction and optical pulse shaping

JH Ke, Y Gao, JC Cartledge - Optics Express, 2014 - opg.optica.org
carrier phase recovery using a sliding window two-stage simplified QPSK partitioning and
QPSK … Figure 18 shows the dependence of the BER (average of the three channels) on the per…

Nonlinear mitigation on subcarrier-multiplexed PM-16QAM optical systems

FP Guiomar, A Carena, G Bosco, L Bertignono… - Optics express, 2017 - opg.optica.org
… of the carrier phase is performed using the 16QAM-modified (QPSK partitioning) Viterbi & …
maximum reach of the system based on the average BER among all subcarriers, from now …

Energy-efficient implementation of carrier phase recovery for higher-order modulation formats

E Börjeson, P Larsson-Edefors - Journal of Lightwave …, 2020 - ieeexplore.ieee.org
… changes infeasible due to the long averaging window needed to reduce … QPSK partitioning
and can be extended to 256QAM. However, the required length of the averaging window is …