Course detail

Wireless Communication Theory

FEKT-NTRKAcad. year: 2018/2019

The course addresses the theoretical apsects of modern radi communication theory. It emphasizes on the comprehension of principles of operation of communication systems. The students significantly improve their knowledge in the area of signal processing applied in communication theory, e.g. the algorithms of signal detection and signal space representation. Students get detailed informations about transmission over fading channel, transmission using the spread spectrum principe and using the OFDM technique. Moreover the students get knowledge on the advanced coding principles - e.g. the turbo and LDPC codes. During the practical computer ecxercises, the students verify the theoretical knowledge using the MATLAB computer simulations.

Language of instruction

English

Number of ECTS credits

6

Mode of study

Not applicable.

Guarantor

prof. Ing. Roman Maršálek, Ph.D.

Department

Department of Radio Electronics (UREL)

Offered to foreign students

Of all faculties

Learning outcomes of the course unit

The graduate of the course is able to:
- represent the signal in the signal space
- choose a suitable filter for intersymbol interference reduction
- discuss the method of Bayesian statistical detector
- explain the principles of modulation techniques
- create a MATLAB program simulating the principles of digital communication theory
- illustrate the structure of OFDM modulator and demodulator
- compute the output of a block space-time coder

Prerequisites

The student who registers the course should be able to explain the basic terms from the area of probability and statistics, describe mathematicaly basic analogue and digital modulation techniques, create a simple program in the MATLAB environment, compute the response of linear systems to input, discuss the basic terminology and methods from the signal processing theory

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods include lectures and computer laboratories in MATLAB simulation software.

Assesment methods and criteria linked to learning outcomes

up to 15 points for computer in-class excercises
up to 15 points for written test during semester
up to 70 points for final exam

Course curriculum

Lectures:

1. Radio communication system, radio communication signals, complex envelope
2. Channel capacity, information theory
3. Intersymbol interferences, signal shaping, receiver filter
4. Detection of radio communication signals, hypothesis testing, AWGN channel
5. PSK, BPSK, DPSK, QPSK, OQPSK
6. MQAM, MSK, GMSK, CPM - modulation, demodulation, applications
7. Spread spectrum systems I - DSSS, FHSS, spreading sequences
8. Spread spectrum systems I - rake receiver, synchronization
9. Communication channel characteristics, equalizers, nonlinear channels, UWB communications
10. OFDM - principle, modulation using IFFT, cyclic prefix and orthogonality, applications in IEEE 802.11a,g. UW-OFDM and SC-FDMA, application in LTE
11. Synchronization and equalization, MB-OFDM and MC-CDMA systems
12. Block and convolutional codes, cyclic codes, turbo codes, concatenated codes, LDPC codes
13. MIMO systems, space time coding, singular decomposition, Alamouti code, TCM

Computer in-class excercises

1. Complex envelope
2. ISI
3. Optimal receiver
4. Synchronization
5. CDMA
6. OFDM - principle
7. Radio channel
8. RF chain
9. OFDM II - influnce of RF parameters
10. UWB principles
11. Coding
12. test

Work placements

Not applicable.

Aims

The aim of the course is to make students familiar with the wireless communication link, representation of information, signal detection, methods of intersymbol interference supression, advanced coding techniques coding, fading channel characteristics, amplitude and phase keying and with properties of communication systems OFDM, CDMA and UWB.

Specification of controlled education, way of implementation and compensation for absences

the computer in-class excercises are compulsory

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

HAYKIN, S. Digital Communications, John Wiley & sons, 1998, 597 s., ISBN 0-471-62947-2. (EN)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme EECC-MN Master's

    branch MN-EST , 1 year of study, winter semester, compulsory

Type of course unit

 

Lecture

39 hod., optionally

Teacher / Lecturer

prof. Ing. Roman Maršálek, Ph.D.

Syllabus

The communication system. A wireless channel, a bandlimited channel, additive noise, fading.
Wireless communication signals. Power efficiency. Bandwidth efficiency. Error rate and E/N ratio. The equivalence of band-pass and low-pass. Line codes. Complex envelope.
Decision theory. Detection of signals. Additive white Gaussian noise channel. Antipodal signals. Detection of binary signals.
Inter symbol interference. Signal shaping. Receiver filter, transmitter filter. Equalizers.
Fading. Fading channel characteristics. Classification of the channels. Fading envelope distributions. Diversity techniques.
PSK, BPSK, DPSK. Waveforms, power spectral densities, constellations. Modulation and demodulation, error probability.
QPSK, OQPSK. Waveforms, power spectral densities, constellation diagrams, modulation, demodulation. Carrier recovery, clock recovery.
MSK. Power spectrum and bandwidth, modulation and demodulation, error probability, synchronisation.
CPM. The description, the trellis, the power spectral density, modulation, demodulation, synchronisation.
QAM. Power spectral densities, detection and error probability. Modulation and demodulation, synchronisation.
OFDM. Modulation using IFFT. The cyclic extension and orthogonality. A non-constant amplitude problem.
Spread spectrum systems. Direct sequence systems. Suppression of the undesirable signal. Rake receivers. Diversity. Frequency hoping.
Spreading sequences for CDMA and FH.
Space-time coding. UWB.

Exercise in computer lab

26 hod., compulsory

Teacher / Lecturer

doc. Ing. Jiří Blumenstein, Ph.D.
doc. RNDr. Jitka Dluhá, Ph.D.

Syllabus

Modelling and simulation of the baseband signals.
Simulation of the bandpass signals.
Simulation of the frame synchronisation.
Modelling of the fading and diversity receptions.
Phase keying. Passing keying signals through the wireless channel, demodulation.
QPSK. MQAM. Passing keying signals through the wireless channel, demodulation.
OFDM. CDMA. Passing keying signals through wireless channels, demodulation.