title: Nonlinear compensation with DBP aided by a memory polynomial.
abstract: Using digital backpropagation (DBP) based on the split step Fourier method (SSFM) aided by a memory polynomial (MP) model, we demonstrate an improved DBP approach for fiber nonlinearity compensation. The proposed technique (DBP-SSFM&MP) is numerically validated and its performance and complexity are compared against the benchmark DBP-SSFM, considering a single-channel 336 Gb/s PM-64QAM transmission system. We demonstrate that the proposed technique allows to maintain the performance achieved by DBP-SSFM, while decreasing the required number of iterations, by over 60%. For a transmission length of 1600 km we obtain a complexity reduction gain of 50.7% in terms of real multiplications in comparison with the standard DBP-SSFM.
authors.forename: João
authors.initials: J
authors.lastname: Gonçalves
authors.forename: Celestino S
authors.initials: CS
authors.lastname: Martins
authors.forename: Fernando P
authors.initials: FP
authors.lastname: Guiomar
authors.forename: Telmo R
authors.initials: TR
authors.lastname: Cunha
authors.forename: José C
authors.initials: JC
authors.lastname: Pedro
authors.forename: Armando N
authors.initials: AN
authors.lastname: Pinto
authors.forename: Pedro M
authors.initials: PM
authors.lastname: Lavrador