Academic Year 2020/2021 - 3° Year
Teaching Staff: Salvatore SERRANO
Credit Value: 6
Scientific field: ING-INF/03 - Telecommunications
Taught classes: 35 hours
Exercise: 15 hours
Term / Semester:

Learning Objectives

Knowledge and understanding the most important elements regarding digital communications
Capture and understanding the basic elements to analyze digital transmission techniques, and the procedures for achieving the main parameters characterizing a digital and analog communication system.
Improving capabilities to analyze both vector spaces to represent signals, and techniques for analog-to-digital conversion.

Applying knowledge and understanding of the state-of-art technologies of digital communications systems, also targeted to the practical application in non-usual contexts
Skills development for analysis of reference systems of analog and digital communications systems, also aimed at the individuation of the main system parameters (signal-to-noise ratio, bit error rate, bandwidth, energy consumption, circuit complexity). The target is to allow the student to use this knowledge also for future systems, although different from the ones studied in this course.

Making judgements of the main topics of this course
Outgrowth of a sufficient level of making judgements in discovering the main peculiarities of analog and digital communications systems and of the available tools not only for the design of simple systems like the ones studied during the course, but also of more complex systems, like satellite communications and 5G, which require further maturation of what studied during the course.

Communication skills finalized to heterogeneous interlocutors
Outgrowth of an effective and high-level communications skill for topics regarding analog and digital transmission, modulation systems and transmission devices.

Learning skills of the evolutions of the topics studied during the course, independently
Outgrowth of skills for autonomous training regarding scientific evolution and specific digital communications technologies to deepen new transmission technologies for cables, fiber and wireless, also with reference to techniques applied to ADSL, LTE, 4G and 5G.

Course Structure

The course is composed of a part of theory (35 hours), and a part of practice (15 hours).
In the case lectures will be partially or fully realized remotely by a video-communications platform, what declared above could undergo some changes, in order to achieve the objectives targeted in this syllabus.

Detailed Course Content

The course is structured in the following Elementary Teaching Units (ETU):

Contents Hours Reference material

ETU 1: Baseband pulse and digital signaling

  • Reference scheme; Pulse Amplitude Modulation; Transmission formatting filter
  • Binary and Multilevel Line Codes. Power Spectrum. Spectral Efficiency.
  • Orthogonal and orthonormal Series Representation of Signals; Multidimensional tranmission.
  • Intersymbol Interference (ISI) and Nyquist Criteria
  • Bit error rate (ber) for base-band digital transmissions
  • Diagrams of digital modulators and demodulators
  • Antennas and 5G systems
24 Couch: Chap. 3.1 and 3.2
and material provided by the lecturer

ETU 2: Analog modulations

  • Complex Envelope Representation of Bandpass Waveforms; Definitions: Baseband, Bandpass, and Modulation
  • Spectrum and power spectrum of band-pass signals
  • Average and peak power of band-pass signals.
  • Amplitude, Phase and frequency modulation of analog signals
10 Couch: Chap. 5.1 – 5.5 and Chap. 7.8
and material provided by the lecturer

ETU 3: Digital modulations

  • Binary modulations: OOK, BPSK and 2-FSK: complex envelope and modulated signl; Power spectrum of the digital envelope and of the modulated signal; *transmission bandwidth, *Bit error rate
  • Multidimensional modulations: MPSK, QPSK and N-QAM: complex envelope and modulated signal; Power spectrum of the digital envelope and of the modulated signal; *transmission bandwidth, *Bit error rate
  • DMT and OFDM transmission systems
10 Couch: Chap. 7.1 – 7.7
and material provided by the lecturer

ETU 4: Baseband transmission of analog signals

  • PCM modulation. Sampling, Quantization, and Encoding
  • Uniform and non-uniform Quantization.
  • Design of Telephone PCM
6 Couch: Chap. 3.3
and material provided by the lecturer

Textbook Information

  1. [Cou] Leon W. Couch, Digital & Analog Communication Systems (8th Edition), Pearson Education Limited, 2013.
  2. [Pro] J. G. Proakis, M. Salehi, Communication System Engineering, Prentice Hall