Checking date: 16/01/2026 18:50:10


Course: 2025/2026

Digital Communications
(13842)
Bachelor in Mobile and Space Communications Engineering (Study Plan 2019) (Plan: 442 - Estudio: 217)


Coordinating teacher: LAZARO TEJA, MARCELINO

Department assigned to the subject: Signal and Communications Theory Department

Type: Compulsory
ECTS Credits: 6.0 ECTS

Course:
Semester:




Requirements (Subjects that are assumed to be known)
Linear Systems (Second year, first semester) Communication Theory (Second year, second semester)
Objectives
Knowledge and management of the different techniques of digital communications (linear and non-linear, multi-carrier and spread spectrum), the structure of receivers and the basic techniques for protection against errors in digital communications. Therefore, the subject has the goal of allowing the student to acquire the following general competences: - Knowledge and development of technical skills required in the telecommunications field with emphasis in the analysis and mathematical characterization of a digital communication system. And in particular, the following specific competences: - Acquisition of the knowledge of mathematics and statistics that will be used as a tool to solve engineering problems in the context of digital communication systems. - The ability to design and conduct experiments, as well as to analyze and interpret data and results. - Design of a communication system with realistic constraints given by critical parameters such as cost, consume of power, bandwidth, transmission rate, and complexity. - Ability of effective communication of information, in speech and in writing.
Learning Outcomes
CB1: Students have demonstrated possession and understanding of knowledge in an area of study that builds on the foundation of general secondary education, and is usually at a level that, while relying on advanced textbooks, also includes some aspects that involve knowledge from the cutting edge of their field of study. CB2: Students are able to apply their knowledge to their work or vocation in a professional manner and possess the competences usually demonstrated through the development and defence of arguments and problem solving within their field of study. CG3: Knowledge of basic and technological subject areas which enable acquisition of new methods and technologies, as well as endowing the technical engineer with the versatility necessary to adapt to any new situation. ECRT5: Ability to weigh the advantages and disadvantages of different alternative technologies for development and implementation of communication systems, from the point of view of signal space, perturbations and noise and analog and digital modulation. ETEGISC6: Ability to analyze, codify, process and transmit multimedia information using analog and digital signal processing techniques.  RA1: Knowledge and Understanding. Knowledge and understanding of the general fundamentals of engineering, scientific and mathematical principles, as well as those of their branch or specialty, including some knowledge at the forefront of their field. RA2: Analysis. Graduates will be able to solve engineering problems through an analysis process, identifying the problem, recognising specifications, establishing different methods of resolution, selecting the most appropriate one and implementing it correctly. They must be able to use various methods and recognize the importance of social constraints, human health, safety, the environment, as well as commercial constraints. RA3: Design. Graduates will have the ability to make engineering designs according to their level of knowledge and understanding, working as a team. Design encompasses devices, processes, methods and objects, and specifications that are broader than strictly technical, including social awareness, health and safety, environmental and commercial considerations. RA5: Applications. Graduates will have the ability to apply their knowledge and understanding to solve problems, conduct research, and design engineering devices or processes. These skills include knowledge, use and limitations of materials, computer models, process engineering, equipment, practical work, technical literature and information sources. They must be aware  of all the implications of engineering practice: ethical, environmental, commercial and industrial.
Description of contents: programme
1.- Introduction 1.1.- Introduction to digital communication systems 1.2.- Digital communication model 1.3.- Objectives and organization of the course 2.- Linear modulations 2.1.- Baseband PAM modulations 2.2.- Bandpass PAM modulations 3.- Detection under intersymbol interference 3.1.- Problem statement 3.2.- Memoryless symbol-by-symbol detector 3.3.- Maximum likelihood sequence detector 3.4.- Channel equalizers 4.- Non-linear modulations (phase and frequency modulations) 3.1.- QPSK and OQPSK modulations 3.2.- Differential phase modulations (DPSK) 3.3.- Frequency modulations (CPFSK and MSK) 3.4.- Continuous phase modulations (CPM) 4.- Multipulse modulations 4.1.- Spread spectrum modulations (DS-SS, FH-SS) 4.2.- Frequency division multiplex modulations (FDM, OFDM) 5.- Channel coding for error protection 5.1.- Introduction to channel coding and some definitions a la codificación y definiciones 5.2.- Linear block codes 5.3.- Convolutional codes
Learning activities and methodology
In order to cover the 6 ECTS credits of the course, the following learning activities are considered: 1) Theoretical¿practical lectures - 1.68 ECTS 2) Workshops and laboratory sessions - 0.32 ECTS 3) Individual or group work - 3.84 ECTS 4) Final examination - 0.16 ECTS The theoretical lectures consist of expository sessions that combine the use of the blackboard, projection systems, and audiovisual media to illustrate specific concepts. During these sessions, the explanation of theoretical concepts is complemented with the solution of exercises. Through these activities, students acquire the fundamental contents of the course. It should be emphasized that these lectures require initiative and both individual and group work from the students, as some concepts must be studied independently based on provided guidelines, and certain specific cases must be developed by the students themselves. In the practical or problem-solving sessions, students are provided in advance with the corresponding problem statements. The resolution of exercises by the students aims at consolidating the concepts presented in the theoretical lectures in a more applied context and also allows students to self-assess their level of understanding. Laboratory sessions mainly consist of demonstrations of the concepts covered in the theoretical lectures through computer-based simulations (MATLAB) of different components of a communication system. Students analyze how variations in system parameters affect overall system performance. Assessment of these sessions is carried out through tests and the submission of laboratory reports. The tutoring system includes a weekly schedule of two hours of individual tutorials, which is published on GLOBAL CLASSROOM. In addition, prior to each continuous assessment midterm exam, a group tutorial session is held to address questions related to the contents of the corresponding assessment.
Assessment System
  • % end-of-term-examination/test 60
  • % of continuous assessment (assigments, laboratory, practicals...) 40

Calendar of Continuous assessment


Extraordinary call: regulations
Basic Bibliography
  • J. G. Proakis. Digital Communications, 4th Edition. McGraw-Hill. 2001
  • S. Benedetto y E. Biglieri. Principles of Digital Transmission with Wireless Applications. Kluwer. 1999
Additional Bibliography
  • B. Sklar. Digital Communications : Fundamentals and Applications. Prentice Hall. 1988
  • S. Haykin. Digital Communications. John Wiley & Sons. 1988

The course syllabus may change due academic events or other reasons.


More information: http://www.tsc.uc3m.es/~mlazaro/Docencia/GICME-CD.html