AEROSPACE TELECOMMUNICATION SYSTEMS

Course objectives

GENERAL The course provides the basic elements of telecommunications systems in the context of aerospace. In particular, it provides competences in signal theory for both continuous-time and discrete-time signals, which have transversal validity for experimentation activities in the aerospace field. Building on this basis, the course provides basic knowledge on wired and wireless transmission of signals and data, on aeronautical and satellite communication link, network architectures and protocols, and radar systems for airspace surveillance and Earth observation. In addition, the course provides the basic elements of probability calculation, still with transversal value for aerospace engineering, that allow to define and evaluate the performance and quality parameters of the introduced telecommunications systems. SPECIFIC Knowledge and understanding: at the end of the course, the student acquired a basic knowledge of signal theory and probability calculation and an understanding of the functioning of telecommunications systems and some of their performance parameters. Applying knowledge and understanding: at the end of the course, the student has acquired the ability to critically apply the acquired knowledge of signal theory and probability calculation. He/she has ability to apply knowledge about the functioning of systems and its performance parameters. In addition, the student acquires: Autonomy of judgment: at the end, the student has gained the autonomy of judgment necessary to understand the complexity of the technologies used in the different aeronautical applications and space missions. Communication skills: at the end of the course, the student has acquired the ability to operate in a highly multi-disciplinary context interacting with engineers, designers of structures and information technologies for space, with technical specialists and non-specialist interlocutors. Learning skills: at the end of the course the student has developed the basic ability to deepen the study of sensors and aeronautical and satellite systems.

Channel 1
PIERFRANCESCO LOMBARDO Lecturers' profile

Program - Frequency - Exams

Course program
• Introduction to signal analysis.• Characterization of signals in the time and frequency domains.• Energy and power density spectrum• Transit of signals in systems (signal filtering).• Digital representation of signals: sampling and A/D conversion.• Characterization of digital signals in time and frequency domains. • Filtering of numerical signals. • Use of digital signal acquisition devices to identify periodic components and perform measurements. • Introduction to telecommunications and remote sensing. • Thermal noise characterization. • Analog modulation techniques (AM, FM). • Digital modulation techniques for wired and wireless communications. • Link budget and system design. • Performance of aeronautical and satellite links. • Elements of telecommunications networks and services. • Elements of radar remote sensing systems (surveillance and image radars) and satellite navigation systems. • Introduction to probability theory: probabilistic approach and its use for the TLC systems performance characterization. • Discrete random variables: probability, distribution function, and moments. • Uniform and Bernoulli distribution. • Binary random channel with error detection and correction. • Example of channel coding with Hamming code. Continuous random variables: probability density, distribution function, and moments. • Uniform and Gaussian probability density function. • Evaluation of the error probability for numerical links. • Two-dimensional random variables and positioning error characterization.
Prerequisites
The exam of the course Fisica II is required to be passed before this course. The prerequisite for this course is the basic knowledge of Fisica II together with knowledge of calculus.
Books
Teaching material: - Slides and notes available at the web site https://elearning.uniroma1.it/course/view.php?id=12989 - “Segnali e sistemi per le telecomunicazioni”, Claudio Prati, McGraw-Hill, 2nd ed, 2010.
Teaching mode
The course can be attended both in the traditional in-classroom way (following the indications by Sapienza) and from the remote, in a synchronous way by means of real-time online connection. Moreover, the video-recorded lectures are progressively made available for the lectures. Therefore, also an asynchronous attendance is possible.
Frequency
Despite highly recommended, attendance at the course lectures is not compulsory.
Exam mode
ASSESSMENT TOOLS: The written exam (30% of the final grade) lasts 3 hours and is composed of the following: - 1 exercise on signal analysis. - 1 exercise on link-budget design for aeronautical or satellite links. - 1 exercise on probability theory. - 1 written test on the operation of TLC systems for aerospace. The written test is passed if a positive evaluation is achieved in at least two out of the four points above. The oral exam (70% of the final grade) is composed of two parts: (i) signal theory (ii) probability theory (iii) Telecommunication and remote sensing systems ASSESSMENT METHODS: Assessment of knowledge and skills in the analysis of analog and digital signals in time and frequency domains as well as the changes undergone in the transit through linear and permanent systems; assessment of knowledge on sampling techniques and digital/analog conversion; assessment of the student's knowledge and ability to use the fundamentals of probability theory; assessment of knowledge and skills in the preliminary design of aeronautical and satellite links; assessment of knowledge on analog and digital modulation techniques and on the basic operation principles of search and imaging radar systems. EVALUATION CRITERIA: For each topic (thirty points based rating): sufficient knowledge (rating from 18 to 20); average knowledge (rating from 21 to 23); sufficient skills to apply the knowledge (rating from 24 to 25); good skills to apply the knowledge (rating from 27 to 28); excellent skills to apply the knowledge (rating from 29 to 30 with honors).
Bibliography
Understanding Signal Theory through Play, https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5967223
Lesson mode
The course is taught in the traditional in-classroom way (following the indications by Sapienza). Moreover, the video-recorded lectures are progressively made available for the lectures. Therefore, also an asynchronous attendance is possible.
  • Lesson code1041615
  • Academic year2024/2025
  • CourseAerospace engineering
  • CurriculumIngegneria Aerospaziale (percorso valido anche ai fini del conseguimento del doppio titolo italo-venezuelano)
  • Year3rd year
  • Semester2nd semester
  • SSDING-INF/03
  • CFU6
  • Subject areaAttività formative affini o integrative