611 citations · 2.4k across the 80 of their papers we have counts for
6 papers · 2 filters
Analytical Modeling of Nonlinear Fiber Propagation for Four Dimensional Symmetric Constellations
Hami Rabbani, Mostafa Ayaz, Lotfollah Beygi +4
Coherent optical transmission systems naturally lead to a four dimensional (4D) signal space, i.e., two polarizations each with two quadratures. In this paper we derive an analytic…
Low-Complexity Geometric Shaping
Ali Mirani, Erik Agrell, Magnus Karlsson
Approaching Shannon's capacity via geometric shaping has usually been regarded as challenging due to modulation and demodulation complexity, requiring look-up tables to store the c…
Pilot Distributions for Joint-Channel Carrier-Phase Estimation in Multichannel Optical Communications
Arni F. Alfredsson, Erik Agrell, Magnus Karlsson +1
Joint-channel carrier-phase estimation can improve the performance of multichannel optical communication systems. In the case of pilot-aided estimation, the pilots are distributed…
Optimization of Transmitter-Side Signal Rotations in the Presence of Laser Phase Noise
Arni F. Alfredsson, Erik Agrell, Magnus Karlsson +1
The effects of transmitter-side multidimensional signal rotations on the performance of multichannel optical transmission are studied in the presence of laser phase noise. In parti…
On the Performance under Hard and Soft Bitwise Mismatched-Decoding
Tsuyoshi Yoshida, Mikael Mazur, Jochen Schröder +2
We investigated a suitable auxiliary channel setting and the gap between Q-factors with hard and soft demapping. The system margin definition should be reconsidered for systems emp…
Improved Simulation Accuracy of the Split-Step Fourier Method
Shen Li, Magnus Karlsson, Erik Agrell
We investigate a modified split-step Fourier method (SSFM) by including low-pass filters in the linear steps. This method can simultaneously achieve a higher simulation accuracy an…