S-72.227 Digital Communication Systems (3 cr)

SPRING 2005 


27 + 33 (2 + 2) Spring term


Prof. Timo O. Korhonen, tel. 09 451 2351, Research Scientist Michael Hall, tel. 09 451 2343

Course assistants

Research Scientist Seppo Saastamoinen, tel. 09 451 5417, Research Scientist  Naser Tarhuni, tel. 09 451 2362


Cyclic and convolutional codes, selected topics in bandpass digital transmission, multipath channel, digital transmission in fading channel, diversity techniques, multiuser detection and intensity modulated fiber optic systems


Closed book examination, half of examination questions comes directly from tutorials and compulsory Project Work. Course grade = OODI-marking = ROUND(0,5*Exam grade + 0,5*Project Work grade).


Course books: A. B. Carlson: Communication Systems, B.P. Lathi: Modern Digital and Analog Communication Systems
References: J. G. Proakis, Digital Communications, L. Ahlin, J. Zander: Principles of Wireless Communications


S-72.245 Transmission Methods in Telecommunication Systems 




Register yourself to the examination by using the topi-system at http://wwwtopi.hut.fi


In contrast to earlier notices we have decided to arrange lectures and tutorial in this course due to the extensive number of kind requests.  The lectures will start on Tuesday 15th of March and tutorials on 21st of March by the following timetable:  

Lectures: each week on Tuesdays  14-16, in hall S3 and on Wednesdays 12-14, in hall I 346

Tutorials: each week on Mondays  14-16 in hall S2

Note: There will be no lectures or tutorials on Eastern holidays: 24.3.05-30.3.05

 You register to the course by registering yourself to the exam. The course belongs to the curriculum of The International Master's Program in Telecommunication  

Last updated

7.4.2006 Seppo Saastamoinen

Course topics 2005

Exam: Tuesday 17.5.2005, 9-12 in hall S1



15.3.  Cyclic codes (ppt)

16.3.  Convolutional codes (ppt); supplementary material: Proof of Viterbi decoding principle, further discussion about coding gain of convolutional codes

22.3.  Fiber-optic communications, supplementary

23.3.  Fading multipath radio channels

5.4.  Digital transmission over a fading channel

6.4.  Adaptive equalization

12.4.  Diversity techniques

13.4.  Basics of spread spectrum communications

19.4.  OFDM in wideband fading channel

20.4 Multiuser reception


21.3.  Tutorial 1: Cyclic and convolutional codes 

4.4.  Tutorial 2: Fiber-optic communications and fading channels

11.4 Tutorial 3: Digital transmission and equalization in fading channels

18.4 Tutorial 4: Diversity techniques in flat fading channels and basics of spread spectrum communications

21.4 Tutorial 5: OFDM in a wideband fading channel



Follow this section for the latest course info!

07.4.2006 Results of the exam on 10.3.2006 and OODI markings can be found here.

23.9.2005 Results of the exam on 5.9.2005 and OODI markings can be found here.

22.6.2005 Results of the project work and OODI markings on 31.5.2005 can be found here.

16.6.2005 Results of the exam on 17.5.2005 can be found here.

21.3.2005 Compulsory Project Work is published and it can be found here.

Course overview

This course is a continuation to S-72.245 Transmission Methods in Telecommunication Systems by expanding its theories into advanced digital telecommunication systems. Application area of digital communication systems is extremely wide: In addition to the well known telecommunication networks as the GSM system, it forms the bases of common-day electrical apparatuses from wrist watches to TVs, video games and satellites.

Objective of this course is to provide students with the knowledge and understanding of advanced digital telecommunications systems with a special emphases on digital, wireless communications. Course starts by inspection of cyclic and convolutional coding principles  that are frequently applied for protecting digital messages in practical telecommunications channels. Course analyses transmission in fading multipath channel and determines performance of various modulation formats. Various diversity techniques are discussed to overcome transmission problems encountered due to multipath propagation. Methods of diversity can be extended to frequency, time and space diversity as well as to code diversity that is the bases of code division multiple access (CDMA) communications. As a practical application we discuss the WCDMA system. We include a discussion of multiuser detection  that can be used to decrease number of base stations in spread spectrum cellular systems or to increase capacity by using multiple antenna techniques (for instance in MIMO-systems). Course is concluded by an overview to fiber-optic communications that is an important technique applicable especially for large data rate transmission as for instance between telephone exchanges.

The course is targeted to fourth year students but you may consider taking this course provided that you fulfil the course prerequisites, or you have studied equivalent subjects earlier.

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