Rate-Adaptive Coded Modulation for Fiber-Optic Communications

Channel-Aware Multilevel Coded Modulation for Coherent Fiber-Optic Communications

The past decades have shown an ever-increasing demand for high-rate Internet services, motivating a great effort to increase the spectral efficiency of optical networks. In general, fiber-optic links are non-Gaussian, and in contrast to additive white Gaussian noise (AWGN) channels, there is no standard framework for quantifying fundamental limits or designing capacity-approaching coding scheme...

Coded Modulation Techniques in Fiber-Optical Communications

Today’s high demand for increasing the data transmission rate motivates a great challenge to improve the spectral efficiency of fiber-optical channels. In order to achieve a higher spectral efficiency, exploiting an advanced coded modulation scheme is inevitable. Since a general fiber-optic link is a non-Gaussian channel with nonlinear behavior, new coded modulation schemes need to be designed ...

Pulse Width Modulation for Analog Fiber-optic Communications

The pulse width modulation (PWM) technique has been revisited and analyzed to evaluate its merits for application to analog signal transmission in fiber-optic links. Fourier analysis of the PWM signal reveals that it can he used as a vehicle to launch an analog signal onto optical fiber when a symmetrical natural sampling process is used. The SNR of the modulated signal depends on the timing ji...

Explorations in Modulation Formats for Nonlinear DWDM Fiber Optic Communications

Fiber - Optic Communications