Chair of Communications

Digital Communications II

080201 / 080054 / etit5003-01a
Prof. Dr.-Ing. Stephan Pachnicke and assistant
Location / Time:
WS 2020/21, from 2.11.2020 to 14.2.2021,
Lecture: Wed 11:00 - 12:30, Online Event
Exercise: Thu 15:15 - 16:45, Online Event
OpenOLAT-Kurs: Digital Communications II

Intended for:

WPFL ETIT-MA ab 1 (ECTS-Credits: 4); WPFL Wirt-IngMA ab 1 (ECTS-Credits: 4); suitable for ERASMUS-/exchange students


The lecture aims at deepening the knowledge in communications. The students shall be enabled to understand the theory and examplary systems of modern digital transmission system. Furthermore, they shall be enabled to assess and design new systems.

Signal equalization in digital transmission: basics of FIR filters, blind adaptive equalizers, nonlinear equalization, optimum receiver structures, maximum likelihood estimation, Viterbi decoder

Codemultiplex (CDMA): basics, pseudo random sequences, code synchronization

Multicarrier transmission (OFDM, DMT): basics, digital implementation using DFT, guard interval, OFDM equalization, symbol mapping, bit and power loading, PAPR reduction, spectral properties, system examples

Systems with multiple in- and outputs (MIMO): development and advantages, system model, Eigenmodes, MIMO channel capacity and waterfilling principle, successive interference cancellation, diversity, maximum ration combining, example for use in future multimode and multicore optical fiber transmission systems

Introduction to channel coding: basics, block codes, convolutional codes, signal space coding, channel capacity and Shannon limit

Practical examples: AM/FM broadcast, digital audio broadcast (DAB), DVB-T, ADSL, WiFi (wireless LAN), Bluetooth, optical freespace transmission, intersatellite communication, optical underwater communication, high-speed fiber optical transmission

The lecture is taught in German.


  • K.-D. Kammeyer, „Nachrichtenübertragung“, Vieweg+Teubner Verlag, 2011 (4. Auflage)
  • P. A. Höher, „Grundlagen der digitalen Informationsübertragung: Von der Theorie zu Mobilfunkanwendungen“, Vieweg+Teubner Verlag, 2013 (2. Auflage)
  • J. R. Barry, E. A. Lee, D. G. Messerschmitt, „Digital Communication“, Springer Verlag, 2003 (3. Auflage)
  • J. G. Proakis, „Digital Communications“, McGraw-Hill, 2008 (5. Auflage)