Signals and Systems I

Lecture "Signals and Systems I"

Due to COVID 19 the lecture as well as the exercise will be presented differently comparted to the years before.

The lecture will be presented as YouTube videos that you find below. Currently, just a few lectures are uploaded, but during the term more and more lectures will be posted there. Please watch these lectures according to the time schedule given below.
During the "official" lecture time (Thursdays, 10:00 h) we offer a chat (not yet clear which tool we will utilized, maybe "Zoom" or "BigBlueButton") where you can ask questions to the lecture. We will announce details about the chat on this website - however all access details will be distributed via e-mail. For this reason, please register to the lecture via the OLAT system. The chat will start on Thursday, 16.04.2020, 10:00 h.
The excercise will be given also online. It's not yet clear how (streaming or downloadable video). Details will be posted soon here. However, the first exercise will be on Monday, 20.04.2020, 14:30 h.

	Lecture overview
	Lecturers:		Gerhard Schmidt (lecture), Patricia Piepjohn and Marco Gimm (exercise)
	Room:		C-SR-I
	Language:		German
	Target group:		Students in electrical engineering and computer engineering
	Prerequisites:		Mathematics for engineers I, II, III, Foundations in electrical engineering I, II
	Contents:		This course teaches basics in systems theory for electrical engineering and information technology. This basic course is restricted to continuous and deterministic signals and systems. Topic overview: Basic classes of signals and systems Introduction and notation Signals Systems Signals Elementary signals Reaction of linear systems on elementary signals Signal decomposition into elementary signals Spectral representations of deterministic signals Fourier series, Discrete Fourier Transform (DFT) Fourier transform Laplace and z transform Linear systems Reaction on elementary signals Reaction on arbitrary signals Quantities for describing linear systems and their relations Stability of linear systems Rational transfer-functions Modulation Basics Sampling theorem
	References:		H.W. Schüßler: Netzwerke, Signale und Systeme II: Theorie kontinuierlicher und diskreter Signale und Systeme, Springer, 1991 H.D. Lüke: Signalübertragung, Springer, 1995

07.04.2020 - Indroduction (3 videos) in now complete and online via YouTube (also embedded below).

01.04.2020 - First lecture (30 minutes, introduction) is online via YouTube and embedded below.

	Link		Content
			Slides of the lecture "Introduction" (details of the lecture, notation, signals, systems)
			Slides of the lecture "Signals" (basic signals, reaction on basic signals, signal decomposition)
			Slides of the lecture "Spectral Representations - Part 1" (Fourier series, Discrete Fourier Transform)
			Slides of the lecture "Spectral Representations - Part 2" (Fourier Transform)
			Slides of the lecture "Spectral Representations - Part 3" (Laplace and z-transform)
			Slides of the lecture "Linear Systems" (Basics and relations between different system descriptions)
			Slides of the lecture "Modulation" (Basics and linear modulation schemes)

	Link		Content		Please try until
			Please prepare excercises 1 and 2.		20.04.2020 - 14:30 h
			Please prepare excercises 5, 6, and 7.		27.04.2020 - 14:30 h
			Please prepare excercise 9.		04.05.2020 - 14:30 h

	Link		Content		Link		Content
			Current evaluation				Completed evaluations

A formulary can be found below:

	Link		Content
			Formulary

Our SONAR Simulator Supports Underwater Speech Communication Now

Due to the work of Owe Wisch and Alexej Namenas (and of the rest of the SONAR team, of course) our SONAR simulator supports now a real-time mode for testing underwater speech communication. A multitude of "subscribers" can connect to our virtual ocean and send and receive signals. The simulator consists of large (time-variant) convolution engine as well as a realistic noise simulation that takes parameters such as wind speed, etc. into account. In addition, linear and non-linear behaviour of the sending and receiving hardware can be simulated. However, no simuator is of course as beautiful as the real sea.