Lecture "Digital Signal Processing"

Basic Information

 Lecturers: Gerhard Schmidt (lecture) and Eric Elzenheimer (exercise) Room: Building C - SR II (lecture and exercise) Language: German Target group: Students of Electrical Engineering and Computer Engineering in their 6th semester, also for students of Computer Science or Physics with appropriate knowledge of signals and systems. Prerequisites: Mathematics for engineers I, II, III, Foundations in electrical engineering I, II Contents: Topic overview: Signal digitization analogue-to-digital and digital-to-analogue conversion quantization characteristics, quantization noise sample and hold sampling of functions and sequences with/without phase shift, down- and up-sampling (decimation, interpolation) Spectra (DFT and FFT) convolution via DFT, fast DFT evaluation radix-2/DIT FFT and alternatives transformation of real sequences, "pruning" and "zoom" FFT spectral analysis of infinite sequences (windowing, periodograms of random signals) Digital filters difference and state equations equivalent realisations/transformed structures, diagonal form, transition matrix realisation effects (input, arithmetic, and coefficient errors) References: Rabiner, L. R.; Schafer, R. W.: Digital Processing of Speech Signals, Prentice-Hall, 1978     Kondoz, A. M.: Digital Speech-Coding for Low Bit Rate Communications System, John Wiley & Sons, 1994     von Grünigen, Daniel: Digitale Signalverarbeitung, Hanser, 2014

Lecture slides

 Slides of the lecture "Introduction" (Introduction, boundary conditions of the lecture) Slides of the lecture "Signals" (Signal types, AD and DA conversion, sample rate conversion) Slides of the lecture "Spectra" (DFT, FFT, fast convolution) Slides of the lecture "Filter" (Structures, state space desciption, realization)

Exercises

 main additional Exercise 1: Sampling and Quantization Exercise 2: Reconstruction Exercise 3: Sample Rate Conversion / Convolution Exercise 4: Discrete Fourier Transform (DFT) / Radix-2-FFT Exercise 5: FFTs of real and complex signals Exercise 6: Windowing effects Exercise 7: Signal-flow graph Exercise 8: Filter - The effect of coefficient rounding in digital filters (Part 1) Exercise 9: Filter - The effect of coefficient rounding in digital filters (Part 2) Exercise 10: Signal-flow graph (mixed)

Evaluation

 Current evaluation Completed evaluations

Current Oral Exams

Below is the list of students with their exam dates. If you do not have a date for the exam yet please use the oral exam booking system on this website. You can find the booking system here. All oral exams take place in the office of Prof. Gerhard Schmidt (Room D-013).

 Date Time Students (matriculation numbers) Assessor

Website News

27.01.2020: Contributions on nerve signal modeling and magnetic muscle measurement by OPMs availaible on IEEE (early access).

27.01.2020: Talk about magnetic shielding by Allard Schnabel (PTB, Berlin) takes place on Feb 13, 2020, 17 h, Room: C-SR 1.

26.01.2020: Some reflections on the year 2019 are online now.

17.12.2019: Journal paper on signal processing for breathing protection masks published.

23.11.2019: GaS price 2019 for Jannek Winter for an excellent bachelor topic on underwater communication systems.

15.11.2019: Our new MIMO-SONAR system (sponsored by DFG) is now ready for "take off".

20.10.2019: We had a very good retreat on the island of Sylt.

07.08.2019: Talk from Juan Rafael Orozco-Arroyave added.

11.07.2019: First free KiRAT version released - a game for Parkinson patients

Recent Publications

E. Elzenheimer, H. Laufs, W. Schulte-Mattler, G. Schmidt: Magnetic Measurement of Electrically Evoked Muscle Responses with Optically Pumped Magnetometers, IEEE Transactions on Neural Systems and Rehabilitation Engineering, January 2020, doi: 10.1109/TNSRE.2020.2968148

M. Brodersen, A. Volmer, G. Schmidt: Signal Enhancement for Communication Systems Used by Firefighter, EURASIP Journal on Audio, Speech, and Music Processing, vol. 21, pp. 1 - 19, 2019

E. Elzenheimer, H. Laufs, W. Schulte-Mattler, G. Schmidt: Signal Modeling and Simulation of Temporal Dispersion and Conduction Block in Motor Nerves, IEEE Transactions on Biomedical Engineering, November 2019, doi: 10.1109/TBME.2019.2954592

Contact

Prof. Dr.-Ing. Gerhard Schmidt

E-Mail: gus@tf.uni-kiel.de

Christian-Albrechts-Universität zu Kiel
Faculty of Engineering
Institute for Electrical Engineering and Information Engineering
Digital Signal Processing and System Theory

Kaiserstr. 2
24143 Kiel, Germany

How to find us

Recent News

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 ...