Digital Communications 1

Lecturer:

Tutor:

Supervisor:

Department of Radioelectronics

Synopsis:

In the course, students will get acquainted with basic aspects of the system design and analysis of a digital communication system. The course concentrates on generally coded digital modulation definitions, analysis of spectral properties, and analysis of the communication channel influence. A detailed design of optimal and suboptimal detector is also addressed including the detector error performance. The channel coding, channel sharing and synchronization and equalization are introduced on the basic level. A more detailed approach to these topics is subject of more specialized courses EX37DK2 and EX37SEK. The seminars are focused on the practical design, simulation and performance verification of basic subsystems.

Requirements:

Syllabus of lectures:

1. CAD tools for digital communication systems design and simulation.

2. General definition of (coded) digital modulation. Classification of modulations. Basic properties.

3. Digital modulation definitions - linear/nonlinear, memoryless (PSK, QAM, FSK,...).

4. Digital modulation definitions - linear/nonlinear, with memory (TCM, CPFSK, CPM, GMSK,...).

5. Digital modulation definitions - space-time, adaptive, multidim. data (STM, OFDM, MCM,...).

6. Digital modulations with impulse carrier signals - Ultra-WideBand. Channel sharing (CDMA, FDMA, TDMA, SDMA).

7. Elements of channel coding. Block and convolutional codes.

8. Spectral properties of digital modulations.

9. Communication channel linear/nonlinear, AWGN, multipath fading, spatial diversity.

10. Detection of (coded) digital modulations. Optimality criterion.

11. Detectors - correlation detector, signal space detector.

12. Detection of modulations and codes with memory, Viterbi algorithm. Suboptimal detectors.

13. Elements of synchronization and equalization.

14. Performance properties of detectors (detection error, ISI).

Syllabus of tutorials:

1. CAD tools for digital communication systems design and simulation

2. Design and simulation of linear modulator

3. Design and simulation of nonlinear modulator

4. Spectral properties of digital modulations

5. Communication channel models

6. Design and simulation of linear modulation detector

7. Viterbi algorithm

Study Objective:

Study materials:

1. Proakis, J.G.: Digital Communications. McGraw-Hill. 1995

2. Benedetto, S., Biglieri, E., Castellani, V.: Digital Transmission Theory. Prentice-Hall. 1987

3. Simon, M.K., Hinedi, S.M., Lindesy, W.C.: Digital Communication Techniques-Signal Design and Detection. Prentice-Hall. 1995

4. Oppermann I., Hamalainen M., Iinatti J.: UWB theory and applications, John Wiley & Sons, 2004

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans: