Digital Communication

Code

7333

Academic unit

Faculdade de Ciências e Tecnologia

Department

Departamento de Engenharia Electrotécnica

Credits

5.0

Teacher in charge

Paulo da Costa Luís da Fonseca Pinto, Rui Miguel Henriques Dias Morgado Dinis

Weekly hours

4

Total hours

60

Teaching language

Português

Objectives

Provide the students with:

• The knowledge on sinusoidal modulation techniques, including aspects such as spectral and power efficiency.
• The knowledge on receivers and adequate emission structures to this type of signals, as well as signal processing algorithms.
• Strong knowledge on channel codification techniques and coding/decoding algorithms.
• Become familiar with the coding/decoding techniques usually used in modern digital communication systems (related with other courses such as "Comunicações Sem Fios").
• Solid theoretical bases and abilities that allow a professional activity in the telecommunications area, or more advanced studies.

Subject matter

Study of the digital modulation and codification techniques employed in the digital communication systems. Study of the digital modulation techniques, including aspects like spectral and power efficiency, as well as the emission/reception structures characterization. Is given special attention to QPSK, OQPSK,  and QAM modulations. Analysis of different coding techniques usually used at physical layer, including convolucional codes, block codes, and concatenated schemes (serial and parallel).

Introduction to the spread spectrum techniques, giving emphasis to the statistics properties associated to the different code types and respective scenarios of applicability.

Relationship between the subjects studied and real systems such as GSM, UMTS, CDMA, 802.11b/g, Wimax and ADSL. 

Bibliography

"Communications Systems", A. Bruce Carlson, Paul B. Crilly e Janet C. Rutledge, Mc-Graw Hill, 4^th edition, 2002.     
"Turbo Coding, Turbo Equalisation and Space-Time Coding for Transmission over Fading Channels", Lajos Hanzo, T. H. Liew e B. L, John Wiley & Sons, August 2002.   

Teaching method

The course consists on two weekly sessions of theoretical-pratical seminars with the duration of one hour and half each. There is also a pratical part with one weekly session of two hours. In the practical part the students must perform one group project (up to two students per group).

Evaluation method

General Rule

The assessment is composed by a theoretical part and a practical part. The student must have a minimum of 9.5 point in each part The final grade for the approved students (in any of the possible dates of exams) is weighted in 75% for the theoretical part and 25% for the practical part

Theoretical Part

The assessment of the theoretical part can be distributed or centralized:

Distributed assessment – consists on the execution of two mid-term tests. On the date of the final exam it is possible to repeat one mid-term test upon invitation from the structors. The theoretical grade is calculated using the following formula:

 theor_grade = 50% 1^st test + 50% 2^nd test

Centralized assessment – consists on the execution of a final exam. In this case the theoretical grade is the grade of the exam. Students that opted by the distributed assessment can change to the centralized assessment any time during the semester.

Courses

• Especialização em Microelectrónica e Sistemas Digitais
• Engenharia Electrotécnica e de Computadores