Course detail

Communication Systems 1

FEKT-BKC-KS1Acad. year: 2024/2025

In the first part of the course, students become familiar with architecture of common analog and digital communication systems (block diagram, basic functions). Then, the building blocks operation and methods of signal processing (source coding, encryption, channel coding, equalization, modulation, synchronization, etc.) will be described in detail and examples of the building blocks application in current communication systems will be given. In the next part of the course, methods of sharing of communications resources (multiple access, frequency spectrum allocation, methods of signal transmission) will be presented and the principle of spread spectrum and OFDM systems will be explained. At the end, the effects of the transmission environment on signal propagation and methods of their elimination (fading, Doppler effect, diversity) will be described.

Language of instruction

Czech

Number of ECTS credits

7

Mode of study

Not applicable.

Guarantor

prof. Ing. Aleš Prokeš, Ph.D.

Department

Department of Radio Electronics (UREL)

Entry knowledge

Fundamentals of signal processing and electronics are required.

Rules for evaluation and completion of the course

Students can obtain 30 points for the activity in laboratory and numerical exercises. The final exam is awarded by 70 points (maximally).
Evaluation of activities is specified by a regulation, which is issued by the lecturer responsible for the course annually.

Aims

The aim of the course is to acquaint students with the concept and common architecture of analogue and digital communication systems, with their basic building blocks operation and with the used methods of signal processing, explain the effects of the transmission environment and methods of sharing of communications resources, show examples of the use of partial building blocks in current communication systems.
The graduate is able:
1. describe architecture of common analog, and digital communication systems,
2. explain basic building blocks operation,
3. apply some algorithms of signal processing,
4. explain the effects of the transmission environment and methods of sharing of communications resources,
5. orientate oneself in the use of partial building blocks in current communication systems.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

PROKEŠ, A. Komunikační systémy. Přednášky. Komunikační systémy. FEKT VUT Brno, Ústav radioelektroniky.: 2011. (CS)
SKLAR, B. Digital Communications: Fundamental and Applications, 3rd Edition. Pearson, 2020 (CS)
ŠEBESTA, V. Teorie sdělování. Skriptum FEI VUT v Brně, Vutium, 1998 (CS)
ŽALUD, V. Moderní radioelektronika. Praha, BEN, 2000 (CS)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme BKC-EKT Bachelor's 3 year of study, summer semester, compulsory

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

prof. Ing. Aleš Prokeš, Ph.D.

Syllabus

  • History of communication systems, theoretical foundations of communication, channel capacity.
  • Digital communication system architecture. Formatting and source coding.
  • Source coding of speech, image, video, and data.
  • Cryptography, symmetric and asymmetric ciphering, RSA, El-Gammal.
  • Channel coding. Linear codes. Hamming codes.
  • Cyclic and convolutional codes. LDPC codes.
  • Pulse modulation in the baseband, PAM, PWM, PPM, line codes.
  • Signal detection in a noise, matched filter.
  • Analog modulations (AM, QAM, FM and PM).
  • Digital modulation of MPSK, MFSK, MQAM, MSK and their modifications.
  • Multiple access techniques(FDMA, TDMA, CDMA). Multiplexing methods.
  • Radio interface, transmitter and receiver concept.
  • Synchronization. Carrier recovery. Symbol timing regeneration. Network synchronization.

Fundamentals seminar

13 hod., compulsory

Teacher / Lecturer

prof. Ing. Aleš Prokeš, Ph.D.

Syllabus

  • Repetition of basic signal theory.
  • Channel capacity, nonuniforming quantization.
  • Lossless data compression, Hufmann code, LZW.
  • Conventional cryptography, substitution encryption techniques, asymmetric cryptography, RSA, El-Gammal ciphering.
  • Channel coding, Hamming code, cyclic codes.
  • Convolutional codes.
  • Amplitude, frequency and phase modulation, QAM, PSK, FSK.
  • Synchronization, PLL design.
 

Exercise in computer lab

13 hod., compulsory

Teacher / Lecturer

prof. Ing. Aleš Prokeš, Ph.D.

Syllabus

  • Channel capacity, band-pass sampling, non-uniform quantization.
  • Data compression, JPEG, Hufmann code.
  • PKC cryptography, RSA, El-Gammal ciphering.
  • Channel coding, Hamming code, cyclic codes.
  • Convolutional codes, LDPC codes.
  • Matched filter, ISI, Equalization.
  • Amplitude, frequency and phase modulation, QAM, PSK, FSK.
 

Laboratory exercise

26 hod., compulsory

Teacher / Lecturer

prof. Ing. Aleš Prokeš, Ph.D.

Syllabus

  • Spectrum of modulated signals. 
  • Line codes.
  • Performances of digital modulated signals. 
  • Matched filter.