Faster than Nyquist Transmission by Non-Orthogonal Time Division Multiplexing of Nyquist Sinc Sequences

TL;DR

This paper introduces a method using non-orthogonal time division multiplexing of Nyquist sinc sequences to increase spectral efficiency and transmit data faster than traditional Nyquist limits in optical systems.

Contribution

It presents a novel approach combining non-orthogonal TDM with Nyquist sinc sequences to enhance data transmission rates beyond conventional limits.

Findings

Increases symbol rate by up to 25%

Demonstrates feasibility through mathematical modeling and simulations

Provides a new pathway for higher spectral efficiency in optical communications

Abstract

One possibility to break down the capacity limit in optical transmission systems are higher spectral efficiencies, enabled by Faster-than-Nyquist signaling. Here we present the utilization of non-orthogonal time division multiplexing of sinc pulse sequences for this purpose. The mathematical expression, with a representation of the Nyquist sinc sequence by a cosine Fourier series and simulation results show that non-orthogonal time-division multiplexing increases the transmittable symbol rate by up to 25%.