Contact: Erik Agrell
Time period: 2014-2017
Grant: VR no. 2013-5271
Optical fiber networks
are indispensable for our society's information infrastructure. The demands for
high-capacity, reliable communications will continue to increase for many
years, due to new emerging services such as cloud processing and telepresence.
This project addresses one of the fundamental bottlenecks in the development of
next-generation optical networks, namely interference.
between copropagating signals on different wavelengths, or between
time-multiplexed signals on the same wavelength. This interference, caused by
both linear and nonlinear effects, is essentially deterministic and has been
accurately modeled. However, the receivers in today's optical networks treat
this interference simply as random noise. In this project, we will challenge
this design paradigm and propose a new network design paradigm based on
multiuser information theory.
First, we will assume
that each transmitter uses a point-to-point optimal transmission scheme, known
to all receivers, and design interference-aware receiver algorithms under
somewhat idealized conditions. Second, we will develop transmission schemes
that minimize the interference at unintended receivers. And third, the new
receiver and transmitter design paradigms will be combined and adapted for use
in realistic, large-scale optical networks, achieving a significant throughput
increase over today's networks.