Abstract
This paper is devoted to an in-depth discussion of the Gaussian Noise
(GN) model which describes non-linear propagation in uncompensated coherent
transmission systems. Similar models and validation efforts are reviewed.
Then, the main equations of the GN model are introduced. An intuitive physical
interpretation of the equations and their features is proposed. The main characteristics
of the non-linear interference (NLI) noise spectra that the GN model produces
are discussed. To ease model exploitation, a new formulation in hyperbolic
coordinates is proposed, which makes numerical integration faster. New approximate
closed-form solutions are also provided. An extension of the GN model to distributed-amplification
scenarios is introduced. NLI noise accumulation versus distance and bandwidth
are studied in depth. Finally, the GN model implications as to system and
networks design and optimization are discussed.
© 2012 IEEE
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