Checking date: 13/07/2020

Course: 2020/2021

Linear Systems
Study: Bachelor in Telecommunication Technologies Engineering (252)

Coordinating teacher: NAVIA VAZQUEZ, ANGEL

Department assigned to the subject: Department of Signal and Communications Theory

Type: Basic Core
ECTS Credits: 6.0 ECTS


Branch of knowledge: Engineering and Architecture

Students are expected to have completed
'Calculus II' and 'Circuits and Systems'
The goal of the course is to provide the students with the theoretical and methodological knowledge necessary to work with continuous and discrete-time signals and LTI (linear and time-invariant) systems in the frequency domain. Upon successful completion of the course a student will meet the following ABET Program Outcomes (PO): a, b, e, k. 1. GENERAL/TRANSVERSAL COMPETENCES: 1.1. Individual-work skills (PO: a, b, e, k) 1.2. Capacity for analysis and synthesis (PO: b, e). 1.3. Ability to apply theoretical concepts to practice (PO: a, b, e, k) 1.4. Skills related to group work, collaboration and coordination with other students (PO: a, e, k) 2. SPECIFIC COMPETENCES: 2.1. Theoretical knowledge of signals and systems representation in the frequency domain (PO: a, b, e, k) 2.2. Capacity for analyzing signals and systems in the frequency domain, with emphasis in applications related to Communications (PO: a, b, e, k) 2.3. Use of fundamental tools for the analysis of signals and systems in the frequency domain, with emphasis in Communications (PO: b, e, k)
Description of contents: programme
Unit 0. Review of Signals and Systems in the Time-Domain Unit 1. Fourier Transform of continuous-time signals 1.1. Fourier series representation of continuous-time periodic signals: analysis and synthesis equations 1.2. Convergence 1.3. Properties of continuous-time Fourier series 1.4. The continuous-time Fourier transform of aperiodic signals 1.5. The continuous-time Fourier transform of periodic signals 1.6. Properties of the continuous-time Fourier transform 1.7. Applications: Filtering and frequency response of systems described by linear constant-coefficient differential equations Unit 2. The discrete-time Fourier transform 2.1. Fourier series representation of discrete-time periodic signals: analysis and synthesis equations 2.2. Properties of the discrete-time Fourier series. Comparison with continuous-time 2.3. The discrete-time Fourier transform for non-periodic signals 2.4. The discrete-time Fourier transform for periodic signals 2.5. Properties of the continuous-time Fourier transform. Parseval's Theorem. Duality 2.6. Filtering and frequency response of systems characterized by linear constant-coefficient difference equations Unit 3. Sampling in the time-domain 3.1. The sampling theorem 3.2. Ideal reconstruction 3.3. Discrete-time processing of continuous-time signals 3.4. Decimation and interpolation Unit 4. Discrete Fourier Transform (DFT) 4.1. Sampling of the Fourier transform 4.2. Discrete Fourier Transform 4.3. Properties 4.4. Applications Unit 5. The z-transform 5.1. The z-transform 5.2. The region of convergence. Properties 5.3. The inverse z-transform 5.4. Properties of the z-transform 5.5. Evaluation of the frequency response from the pole-zero diagram 5.6. Analysis and characterization of LTI systems using the z-transform 5.7. Block diagram representation
Learning activities and methodology
The course comprises four types of activity: lectures, problem solving sessions, group working sessions and laboratory practice. LECTURES (3 ECTS) Lectures provide an oveview of the main mathematical and analytical tools for analysis of signals and systems in the frequency domain mainly using the board and aided by slides and other audiovisual media for the illustration of certain topics. Recommended readings and self-evaluation quizzes are provided for homework. (PO: a) PROBLEM SOLVING SESSIONS (2 ECTS) Students are provided with problem sets for each of the units of the program together with the answers (but not the solving procedures). These are designed to probe a thorough understanding of fundamental concepts and to encourage practice on algebraic manipulations. The instructor solves on the board a selection of the problems allowing students self-evaluation by comparison with their answers. During these sessions students are encouraged to ask questions and suggest alternative answers (PO: a, e and k). LABORATORY EXERCISES (1 ECTS) Laboratory exercises using MATLAB are designed for applying the mathematical tools presented in the lecture. The students learn to model and simulate signals and systems, and to interpret data from their computational work. The degree of freedom is increased from the first towards the fourth session, progressing from mere demonstrations to more open problems. (PO: a, b and k)
Assessment System
  • % end-of-term-examination 50
  • % of continuous assessment (assigments, laboratory, practicals...) 50
Basic Bibliography
  • Alan V. Oppenheim, Alan S. Willsky, with S. Hamid. Signals and Systems. 2nd edition. Prentice Hall. 1996

The course syllabus and the academic weekly planning may change due academic events or other reasons.