Wireless Communications Lab

Module Number: EI7426

Duration: one semester

Ocurrence: summer semester

Language: English

Number of ECTS: 5


Professor in charge: Gerhard Kramer

Amount of work

Contact hours: 60

Self-study hours: 90

Total: 150

Description of Achievement and Assessment Methods

Written final exam (70%) and four quizzes (7.5% * 4 = 30%) done at the beginning of the first, second, third and fifth experiments. The quizzes contain basics of FM-Modulation, of DAB and OFDM, of synchronization algorithms, and of modulation and coding. The final exam contains questions about the theoretical (given in the laboratory manuscript and explained briefly at the beginning of
each experiment for about 20 min.) and the practical (studied during the laboratory) aspects of wireless communications.

Prerequisites (recommended)

Signalrepresentation in time and frequency domain, basics of communications engineering and digital signalprocessing

Intended Learning Outcomes

After completing the module students are able to create a functional receiver which detects data bits from a signal received by an antenna. The students are able to evaluate how training sequences, coding and modulation have to be parameterized depending on the expected channel distortions.


The aim of the course is to learn methods of wireless communications. The participants will create a digital radio receiver according to the DAB-Standard. They will use the ""software-defined-radio"" principle in that the main part of the receiver will be programmed in software. Hardware will be used that permits working with a signal that is received by an antenna. The following topics are considered in detail:
- Time and Frequency Synchronization
- Orthogonal Frequency-division Multiplexing (OFDM) Modulation
- Differential Modulation
- Channel coding
- Filter design
- Comparison with analog transmission schemes
Matlab and GNUradio will be used as programming languages.

Teaching and Learning Methods

Learning method: The students read the theoretical background from the laboratory notes and solve the homework questions. Teaching Method: During the course, the students (in groups of 2 or 3) go through the problems in the laboratory notes and implement a digital receiver step by step with the help of the tutors.


Laboratory notes containing the theoretical background, laboratory problems and homework questions. Softwaremodules (in MATLAB und GNURadio) about the laboratory problems.

Reading List

- W. Hoeg and T. Lauterbach: Digital Audio Broadcasting: Principles and Applications of DAB, DAB+ and DMB, Wiley, 2009
- Ye Li and G. L. Stüber: ""Orthogonal Frequency Division Multiplexing for Wireless Communications"", Springer 2006
- D. Tse and P. Viswanath: ""Fundamentals of Wireless Communication"" Cambridge University Press, 2005
- J. Proakis: ""Digital Communications"", McGraw Hill, 2000