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Efficient RSOA Modelling using Polar Complex-Valued Neural Networks

Dghais, W. Dghais ; Ribeiro, V. M. C. ; Liu, Z. ; Vujicic , Z. ; Violas, M. ; Teixeira, A.

Optics Communications Vol. ?, Nº ?, pp. 1 - 4, September, 2014.

ISSN (print): 0030-4018
ISSN (online):

Scimago Journal Ranking: 0,70 (in 2014)

Digital Object Identifier: 10.1016/j.optcom.2014.08.031

his work presents an effective solution to reduce the computational complexity order of
behavioral model generation for reflective semiconductor optical amplifier (RSOA). The proposed
model is based on a complex valued (CV) neural network (CVNN) structure, using polar CV basis
functions architecture. The CV model parameters are extracted by means of nonlinear complex-domain
Levenberg-Marquardt algorithm, from recorded experimental 20 Msymbol/s 64-quadrature amplitude
modulation (QAM) input-output data. The evaluation results of polar CVNN model proves to be more
adequate to accurately describe the nonlinear dynamic magnitude and phase distortions of RSOA,
compared to double-input double-output real-valued neural network (RVNN) rectangular structure.
Additionally, significant reduction of the computational cost is achieved in comparison to the RVNN
approach .