Czech

Not applicable.

Student, who passed the course, is able:
- to distinguish basic types of binary signals, to compute and draw their spectra and describe principles and characteristics of the most widely used line codes,
- to list individual blocks of the digital communication system and explain their functions,
- to describe additive white Gaussian noise (AWGN) channel model, to define bit error rate, to compute probability of error reception in case of both baseband and passband binary signal transmission affected by AWGN,
- to describe principles, to define parameters and to list characteristics of basic and modern modulation methods,
- to explain the cause of intersymbol interferences (ISI) and Nyquist strategy of zero ISI in sampling moments, to draw and describe impulse responses of both raised cosine and Gaussian shaping filters,
- to describe the principle of channel equalization, to explain operations of adaptive equalizer and decision feedback equalizer,
- to explain the principle and importance of synchronization in the communication system, to explain the purpose of scrambling, to design the block diagram of a simple self-synchronizing scrambler,
- to describe principles of the automatic repeat request (ARQ) and the forward error correction (FEC), to explain the principle of interleaving, to describe methods of block and convolutional interleaving,
- to explain the difference between natural and uniform methods of sampling, the cause of aperture distortion and methods of its suppression,
- to describe principles of the pulse width modulation (PWM), the pulse position modulation (PPM) and the pulse density modulation (PDM),
- to explain the difference between uniform and non-uniform methods of quantization, to compute the power of the quantization noise, to draw the graphs of compressor and expander transfer functions,
- to describe principles and to list basic characteristics of pulse coded modulations (PCM, DPCM, DM, SDM),
- to explain principles of basic methods of signal multiplexing and multiple access,
- to describe and design the orthogonal frequency division multiplex (OFDM), to define its basic parameters and to list its typical characteristics and examples of application,
- to describe basic types of intensity modulations of light used in optoelectronics,
- to categorize the digital subscriber line systems (xDSL), to explain the principle of the increasing its transmission capacity, to draw and describe the ADSL reference model, to draw the composition of the ADSL frequency band, to explain the principle of both near-end and far-end crosstalk,
- to define and compute basic quantities used in the information theory (self-information, entropy, redundancy, mutual information, channel capacity), to explain the principle of the trellis coded modulation (TCM).

Student, who enrolls for the course, should know basic definitions and characteristics of signals and systems with both continuous and discrete time, including their mathematical description and representation in the frequency domain, and also know basic types of probability density and distribution functions and have knowledge of the signal sampling and filtration. It is also assumed that student can compute the derivative and integral of a function, modify equations with logarithms, complex numbers and trigonometric functions, solve linear equations and use the MATLAB software. In general, the bachelor level knowledge from the area of mathematics and physics are required.
Every student who wants to participate in laboratory exercises must have a qualification according to §6, vyhl. 50/1978 Sb., which the student must obtain before his/her first laboratory exercise!

Not applicable.

Teaching methods comprehend tutorials, computer exercise and laboratory measurement. The MATLAB software is used for computer exercises. Laboratory measurements proceed with the aid of specially prepared electronic instruments, Siglent SDG2042X generators and Keysight DSOX2012A scopes.

Student can get:
- up to 6 points for solution of all given assignments,
- up to 2 points for computer exercise (student obtain points for correctly processed tasks),
- up to 2 points for laboratory measurement (student obtain points when teacher verify correctness of results measured and conclusions stated in the submitted protocol),
- up to 20 points for two computer quizzes.
- up to 70 points for compulsory exam, which has a written form. Only students who obtained the credit are admitted to the exam. If the examinator has a problem with the evaluation of the written exam, he/she can put supplement oral questions to the student. Credit is awarded only to those students who submit all assignments and complete computer and laboratory exercises by the end of the teaching part of the semester.

Tutorials:
1) Signals in communication systems. Basic waveform representations of binary digits. Modulation rate, bit rate. Line codes. Technical means for a signal transmission. AWGN channel model. Reception of noised baseband signal.
2) Amplitude and frequency modulations and keyings. Carrier signal recovery at the BPSK receiver. Differential phase-shift keying.
3) Basic parameters and features of the modulation system. Keyings QPSK, O-QPSK, MSK, FFSK, GMSK,π/4-DQPSK, 8PSK, 8PSK-EDGE, MQAM, CAP.
4) Reduction of intersymbol interference (ISI). Synchronization. Scrambling. Methods of error control. Interleaving. Principle of the channel equalization, equalizers.
5) Pulse modulations. Multiplexing and multiple access. Spread spectrum systems. Orthogonal frequency-division multiplexing (OFDM).
6)Effect of the noise in passband. Modulations in optoelectronics. Information theory and coding. Trellis coded modulation (TCM).

Computer exercise:
Basic keying techniques (ASK, PSK, FSK).

Laboratory measurement:
Waveforms and spectra of harmonic, rectangular, amplitude-modulated and frequency-modulated signals.

Not applicable.

Give basic information about signals, methods, principles and parameters of communication systems, especially the digital systems, and also about negative effects on the bit error rate speed of transmission.

Laboratory measurement and computer exercise are mandatory as well as solution of all given assignments and computer quizzes. If the student duly apologize his/her absence, missed exercise or laboratory measurement could be repeated in agreement with the teacher, but no later than the last week of the teaching period.

Not applicable.

Not applicable.

ČÍŽ, R. Principy modulací a přenosu sdělovacích signálů pro integrovanou výuku VUT a VŠB-TUO. 1. vyd. Brno : Vysoké učení technické v Brně, 2014. 140 s. ISBN 978-80-214-5117-9. (CS)
DOBEŠ, J.; ŽALUD, V. Moderní radiotechnika. 1. vyd., Praha : BEN, 2006. 768 s. ISBN 80-7300-132-2 (CS)

HAYKIN, S.; MOHER, M. Introduction to Analog & Digital Communications. 2nd ed., New Jersey (USA) : John Wiley & Sons, 2007. 515 p. ISBN 0-471-43222-9 (EN)
HSU, H. P. Schaum's Outline of Theory and Problems of Analog and Digital Communications. 2nd ed., New York (USA) : McGraw-Hill, 2003. 331 p. ISBN 0-07-140228-4 (EN)
PROAKIS, J. G. Digital Communications. 4th ed., New York (USA) : McGraw-Hill, 2001. 1002 p. ISBN 0-07-232111-3 (EN)