|
Lehrende: Prof. Dr.-Ing. Rolf Jakoby
Veranstaltungsart:
Übung
Orga-Einheit: FB18 Elektrotechnik und Informationstechnik
Anzeige im Stundenplan:
Terr. Funksysteme
Fach:
Anrechenbar für:
Semesterwochenstunden:
1
Unterrichtssprache:
Englisch
Min. | Max. Teilnehmerzahl:
- | -
Lehrinhalte:
The aim of this lecture is to give a basic physical knowledge
of wireless communications, including various satellite and
terrestrial radio systems, in particular for broadcasting and
multimedia applications. A focus will be on the European
approaches for terrestrial- and satellite-based digital video
broadcasting (DVB-T and DVB-S).
Systems of interest are ASTRA and EUTELSAT,
but also generally systems for mobile satellite communications
and satellite navigation, terrestrial broadcasting systems like DAB
and DVB-T (especially for mobile applications) as well as
point-to-multipoint radio access systems such as LMDS and MMDS.
In addition to the lecture, any student has to prepare and carry out
a small project (exercise) in groups of two to three students.
Different problems of wireless communications and systems
will be introduced at the beginning of the lecture. They can be
chosen by the students. The solution of a given problem and
the final results has to be presented by the whole group within
20 to 25 min per group and, in addition, a small written report
of 2 to 5 pages or the slices of the presentation has to be hand over.
Both, will be taken into account as a part of the exams
at the end of this lecture.
Content:
1. Overview of radio broadband distribution and communication systems
1.1 State of the art
1.2 Satellite systems for broadcast and multimedia
1.3 Terrestrial radio systems for broadcast and multimedia
2. Base band signals and modulation schemes (brief repeating)
2.1 Pulse shaping techniques
2.2 Digital modulation of a harmonic carrier signal
2.3 Bit error rate, spectral and bandwidth efficiency of digital modulation schemes
2.4 Error correction and interleaving for multimedia systems
2.5 Signal-to-noise requirements
3. Satellite radio systems (DVB-S)
3.1 Overview of fixed and mobile satellite systems
3.2 Frequency bands, polarization and positions of satellite systems
3.3 Space segment of a satellite system
3.3.1 Transponder model
3.3.2 Satellite antennas
3.4 Earth segment of a satellite system
3.4.1 Direct-broadcasting receiving systems
3.4.2 Mobile satellite systems
3.4.3 Earth stations
3.5 Link budget without propagation effects
3.5.1 Losses
3.5.2 Antenna temperature
3.5.3 Thermal noise and signal-to-noise of satellite systems
3.6 Atmospheric propagation effects
3.6.1 Free-space propagation
3.6.2 Gaseous and fog attenuation
3.6.3 Attenuation due to rain
3.6.4 Depolarization due to hydrometeors and antennas
3.6.5 Semi-empirical propagation model
3.6.6 Link budget of the down- and uplink
3.6.7 Intermodulation
3.6.8 Interference due to neighboring satellites
3.7 Propagation effects of mobile satellite systems
3.7.1 Shadowing and multi-propagation effects
3.7.2 Fading models
4. Local point-to-multipoint multimedia systems (LMDS)
4.1 System concepts
4.2 Radiowave propagation and design of LMDS
4.3 Network architecture of micro cellular LMDS
4.4 Interference analysis
4.7 LMDS with return channel for interactive multimedia
5. Terrestrial digital audio- and video broadcasting systems (DVB-T)
5.1 Fundamentals of terrestrial broadcasting systems
5.2 Orthogonal Frequency Division Multiplexing (OFDM)
5.3 Digital video broadcasting systems
Literatur:
Ohmori, S. u.a.: Mobile Satellite Communications, Artech House, 1998.
Feher, K.: Wireless Digital Communications, Prentice Hall, Inc., 1995.
Feher, K.: Digital Communications, Noble Publishing Corp., 1997.
Feher, K.: Advanced Digital Communications, Noble Publishing Corp., 1997.
Rappaport, Th. S.: Wireless communications, Prentice Hall, 1996.
Pratt, T., Bostian, Ch.: Satellite Communications, John Wiley & Sons, 1986.
Spilker, J.: Digital Communications by Satellite, Prentice-Hall, Inc., 1977.
Ziemer, R. E., Peterson, R. L.: Introduction to Digital Communication,
Prentice Hall, Inc., 2001.
Roddy, D.: Satellitenkommunikation, Hanser Verlag.
Reimers, U.: Digitale Fernsehtechnik, 2. Aufl., Springer, 1996.
Kammeyer, K.D.: Nachrichtenübertragung, 2. Aufl., B.G. Teubner, 1996.
Dodel, H. etc.: Handbuch der Satelliten Direktempfangstechnik, Hüthig, 1991.
Voraussetzungen:
Grundlagen der Nachrichtentechnik und
Übertragungstechnik
Erwartete Teilnehmerzahl:
50
|
