Fernando P. Guiomar

TL;DR: This paper reviews digital signal processing techniques that compensate, mitigate, and exploit fiber nonlinearities in coherent optical fiber transmission systems.

TL;DR: A frequency-domain Volterra series nonlinear equalizer is applied to a 20 Gbaud NRZ-QPSK signal propagated over 1600 km and a 2 dB improvement on the nonlinear tolerance over backward propagation split-step Fourier method is obtained.

TL;DR: In this paper, a set of architectures for coherent optical access networks is presented and the key attributes of each scenario are investigated, as a basis to decrease the cost of the local oscillator (LO) at customer side, and the possibility of using a low-cost laser as LO with real-time detection of a Nyquist-shaped differential quadrature phase-shift keying (DQPSK) signal using simple 8-bit digital signal processing (DSP) on a fieldprogrammable gate array.

TL;DR: In this paper, the authors proposed a symmetric frequency-domain Volterra series nonlinear equalizer (VSNE) with invariant Kernel coefficients, achieving O(Nk N) complexity at the expense of controlled performance penalty.

TL;DR: In this paper, a noniterative digital backward propagation technique based on an inverse modified Volterra series transfer function was proposed to postcompensate transmission linear and nonlinear impairments in the presence of optical noise.