Fundamentals of Communications

The course is a substitute for:

Fundamentals of Communications (X37ZKT)

Lecturer:

Tutor:

Supervisor:

Department of Radioelectronics

Synopsis:

Basics of communication, channel schema and capacity. Transmission environment. Wire communication. Transmission by high- and low-voltage lines and nets. Radio communication. Analog and digital modulations. AM and FM broadcasting, stereo-broadcasting. TV principles and standards. Digital audio and video broadcasting. Circuit concepts and properties for radio transmitters and receivers. Mobile communications.

Requirements:

Visit http://radio.feld.cvut.cz/personal/dobes2/dobes.en.pdf

Syllabus of lectures:

1. Communication basics, channel general schema and capacity. Communication chain.

2. Analog modulation I: amplitude and frequency (spectra, energetic and noise parameters)

3. Analog modulation II: phase. Base-band pulse modulation, PCM

4. Pulse modulation on carriers: ASK, FSK (MSK), PSK, QAM (spectra, constel. diagram).

5. Passive and active elements of radioelectronic devices, their properties. RF amplifiers.

6. Radio devices blocks: oscillators, mixers, modulators a demodulators, phase lock loop

7. Concepts and properties of radio transmitters and receivers

8. Analog (NTSC, PAL, SECAM) and digital (MPEG, OFDM) TV

9. Mobile communication systems, principles of radio positioning and navigation

10. Description of homogenous telecommunication lines, primary and secondary parameters, branched lines

11. Signal transmission over branched non-homogenous lines, principles, disturbance

12. Types of lines (metallic - symmetrical and coaxial, optical), their properties and purposes

13. Local- and wide-area networks for data transmission (circuit- and packet-switching), methods for securing the transmission of data

14. Data transmission over power distribution lines, non-branched lines (very high voltage, high voltage), branched lines (high voltage, low voltage), ripple control, PLC

Syllabus of tutorials:

1. Explanation and demonstration of first three laboratory measurements

2. Task 1: parameters of radio receiver (mirror frequency suppression, selectivity, sensitivity)

3. Task 2: properties and parameters of stereo encoder

4. Task 3: signal transmission by optoelectronic line (Shannon-Kotelnik theorem, converters)

5. Explanation and demonstration of second three laboratory measurements

6. Task 4: operational point, input and output impedances, transfer function of A-class amplifier

7. Task 5: transmission of AM signal in controlled A, AB, B, C class resonance amplifier

8. Task 6.: measurement of radio transmitters with digital modulations

9. Measurement evaluation and assignment of theoretical examples to examination

10. Introduction to the measurement cycle, basic quantities and principles

11. Measuring the analog parameters of a metallic line

12. Setting up a data circuit with modems, diagnostics of I1 and I2 interfaces, spectra of signals, error rate

13. ISDN subscriber services with respect to dispatching applications

14. Measuring and setting up a system for local data transmission over low-voltage power distribution network

Study Objective:

Basic skills of communication technique and telecommunications will be given.

Study materials:

1. Misra, D.K. Radio-frequency and microwave communication circuits. Toronto: John Wiley. 2001

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Heavy-current Engineering- structured studies (compulsory elective course)