Digital Communications

Data is displayed for academic year: 2023./2024.

Lecturers

Prof.
Mislav Grgić
Prof.
Gordan Šišul
Asst. Prof.
Jelena Božek

Exercises

Ivana Žeger
univ. mag. ing. inf. et comm. techn.

Laboratory exercises

Jakov Tutavac
mag. ing.
Ivana Žeger
univ. mag. ing. inf. et comm. techn.

Course Description

Explain the importance of digital communications. Provide basic knowledge about information and their baseband and passband transmission. Explain the concept of analog modulation techniques. Provide introduction to discrete modulations. Explain the functionality and characteristics of OFDM. Provide an overview of Spread Spectrum Systems.

Study Programmes

University graduate
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[FER3-HR] Electric Machines, Drives and Automation - profile
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[FER3-HR] Electronic and Computer Engineering - profile
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[FER3-HR] Electronics - profile
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[FER3-HR] Information and Communication Engineering - profile
Elective Courses (1. semester) (3. semester)
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[FER3-HR] Network Science - profile
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[FER3-HR] Software Engineering and Information Systems - profile
Elective Courses (1. semester) (3. semester)

Learning Outcomes

  1. Explain the idea of digital communications
  2. Estimate digital signal characteristic in baseband and passband transmission
  3. Compare analog modulations
  4. Analyze possibilities and limitations of different analog modulations
  5. Compare discrete modulations
  6. Analyze possibilities and limitations of different discrete modulations
  7. Explain the idea and applications of OFDM
  8. Explain the idea and applications of Spread Spectrum Systems

Forms of Teaching

Lectures

Lectures are conducted with the help of power-point presentations with explanations on the board. Lectures are available online in electronic form.

Exercises

Solving numerical examples.

Independent assignments

During the semester, projects from the course area are planned. More complex tasks would be solved, most often with the use of software tools. Each project would be handled by smaller group of students.

Laboratory

Laboratory exercises are planned during the course. At the end of each exercise, the activity and understanding would be check.

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Laboratory Exercises 0 % 10 % 0 % 10 %
Seminar/Project 0 % 10 % 0 % 10 %
Mid Term Exam: Written 0 % 30 % 0 %
Final Exam: Written 0 % 30 %
Final Exam: Oral 20 %
Exam: Written 0 % 60 %
Exam: Oral 20 %

Week by Week Schedule

  1. Digital communication system model, relation between baseband and passband communication
  2. Baseband communication model, shaping of signals. Optimal receiver. Nyquist's criterions. Effect of nonlinearity
  3. Transmission impairments. Line coding
  4. Differential coding. Modulation concept
  5. Amplitude modulation, frequency modulation
  6. Phase modulation, typical modulator circuits, typical demodulator circuits
  7. Amplitude-Shift Keying, Frequency-Shift Keying
  8. Midterm exam
  9. Phase-Shift Keying, Quadrature Amplitude Modulation (QAM), Minimum-Shift-Keying (MSK), GMSK
  10. Demodulation and probability of bit error rate, Gram Schmidt orthogonalization, comparison of modulation techniques. The quality of modulation
  11. OFDM - purpose and method of realization, channel equalization in OFDM systems, Peak to average power ratio problem. Interference analysis between subcarriers
  12. Adaptive modulation and capacity, Waterfilling algorithm, Multiple access method - OFDMA
  13. Direct Sequence Spread Spectrum (DSSS), Frequency Hopping Spread Spectrum (FHSS), Synchronization in spread spectrum systems. Power control. Code properties. Code selection. Code generation. Example of use in the UMTS system.
  14. Channel Equalization
  15. Final exam

Literature

B. Rimoldi (2016.), Principles of Digital Communication: A Top-Down Approach,, Cambridge University Press
Haykin, Simon (2001.), Communication Systems, John Wiley and Sons
Borivoj Modlic, Ivan Modlic (1995.), Modulacije i modulatori, Školska knjiga
J.G. Proakis; M. Salehi (2018.), Digital Communications, MC GRAW HILL INDIA; 5th edition
Simon Haykin (2013.), Digital Communication Systems, Wiley

For students

General

ID 222530
  Winter semester
5 ECTS
L2 English Level
L1 e-Learning
45 Lectures
0 Seminar
15 Exercises
12 Laboratory exercises
0 Project laboratory
0 Physical education excercises

Grading System

Excellent
Very Good
Good
Sufficient

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