1 Introduction to telecommunication systems and signals, Fourier Transform and its properties, time/frequency duality, Delta function, Fourier transform of periodic signals, linear systems, filters.
2. Low-pass and band-pass signals, band-pass systems, phase delay and group delay.
3 Amplitude modulation, double-sideband modulation with suppressed carrier (DSB-SC).
4. Orthogonal carrier multiplexing, single-sideband and vestigial-sideband modulation, frequency translation, frequency-division multiplexing (FDM).
5. Introduction to probability theory, random variables.
6. Statistical averages, stochastic processes, mean value, correlation and covariance functions.
7. Transmission of a stochastic process through a linear filter, power spectral density, Gaussian stochastic processes.
8. Shot noise, thermal noise, and white noise.
9. Narrowband noise.
10. Frequency modulation (FM): introduction and basic definitions.
11. Narrowband and wideband frequency modulation, transmission bandwidth of FM signals.
12. Generation and demodulation of FM signals.
13. Applications in wireless/wired communication systems
- Teacher: Συμεών Παπαβασιλείου
- Teacher: Ιωάννα Ρουσσάκη
ECTS : 5
Study Load : theory 4, lab 0
Language : el
Learning Outcomes : This course constitutes the main introductory course in the field of communication systems, with an emphasis on stochastic systems.
Upon successful completion of the course, the student will have acquired the following competencies:
• knowledge of the basic communication technologies and how they are used in different environments;
• understanding of the different types of telecommunication systems and their design principles;
• knowledge of the basic techniques and principles for signal transmission through telecommunication systems;
• knowledge of signal and communication system analysis in both the time domain and the frequency domain;
• familiarity with issues related to amplitude modulation (AM), (de)modulation architectures, and multiplexing techniques;
• knowledge of the basic issues related to phase modulation (PM) and frequency modulation (FM);
• familiarity with stochastic processes, their description and properties, and the issues governing their transmission through telecommunication systems;
• understanding of issues related to the presence of noise in communication systems and awareness of the characteristics of different types of noise (e.g., white noise, shot noise, thermal noise).