ISBN 9783843920582

978-3-8439-2058-2, Reihe Informationstechnik

Stephan Hellerbrand
Electronic Predistortion for the Compensation of Transmission Impairments in Fiberoptic Communication Systems

298 Seiten, Dissertation Technische Universität München (2014), Softcover, A5

Zusammenfassung / Abstract

Fiberoptic transmission is subject to various linear and nonlinear effects, which are caused by signal propagation over single-mode fiber. These effects are significantly impeding transmission, in particular for data rates of 10Gbit/s and beyond. The subject of this work is electronic predistortion (EPD) for the compensation of the major transmission impairments. An introduction to optical communication systems, components and some of the most widely used modulation formats with direct or differential detection is provided. Moreover, numerical simulation of optical fiber is discussed and an efficient implementation using graphics processing units is proposed. The principle behind EPD is explained and a mathematical model of the EPD transmitter is introduced. The application of the technique for compensation of chromatic dispersion, fiber nonlinearities and polarization mode dispersion is described with a particular focus on the EPD filter. In addition to that, the performance of EPD for long haul transmission at 10.7Gbit/s and 42.8Gbit/s is analyzed and compared to optically dispersion managed systems for various target modulation formats. This work also provides an analysis of the complexity of signal processing operations for EPD and the D/A converter requirements for various modulation formats. Several approaches to reduce the complexity of EPD are provided and performance trade-offs are discussed. While the focus of this work is on systems with direct detection, the EPD technique can also be combined with coherent receivers and some of the results can be transferred to systems with coherent detection.