Seminar "Selected Topics in Underwater Signal Processing"


Basic Information
Lecturers: Gerhard Schmidt and group
Semester: Summer term
Language: English or German
Target group: Master students in electrical engineering and computer engineering
Prerequisites: Fundamentals of digital signal processing

If you want to sign up for this seminar, you need to register with the following information in the registration form

  • surname, first name,
  • e-mail address,
  • matriculation number,

Please note, that the registration period starts 14.03.2022 at 8:00 h and ends 12.04.2022 at 23:59 h. All applications before and after this registration period will not be taken into account.

Registration will be possible within the before mentioned time under the following subsite - Seminar Registration.

During the registration process you will also choose your seminar topic. Only one student per topic is permitted (first come - first serve).

The registration is binding. A deregistration is only possible by sending an e-mail with your name and matriculation number to This email address is being protected from spambots. You need JavaScript enabled to view it. until Tuesday, 12.04.2022 at 23:59 h. All later cancellations of registration will be considered as having failed the seminar.

Time: Preliminary meeting, online in Zoom, 29.04.2022 at 15:00 h
Written report due on 15.07.2022
Final presentations, online in Zoom, probably on 27.07.2022 at 10:00 h

Students write a scientific report on a topic closely related to the current research of the DSS group. Potential topics, therefore, deal with digital signal processing related to underwater applications.

Students will also present their findings in front of the other participants and the DSS group.


Topics for SS2022

Topic title Description
Synthetic Aperture SONAR

Synthetic Aperture SONAR (SAS) is an advanced form of signal processing for SONAR-systems. It enables significantly detailed images by artificially expanding the aperature of the array. This is achieved by moving the sonar system and simultaneously scanning the environment. This produces a series of images that must be correctly superimposed through clever signal processing, thus enabling a significantly higher resolution with the same SONAR-system. The goal of this seminar is to find and summarize literature about the signal processing of SAS and it’s difficulties in application.

Comparison of
Underwater Communication Modems

The underwater acoustic channel is one of the most challenging channels for communication. Because of damping and dispersion, high-frequency communication is not usable for longer distances underwater. Nevertheless, underwater modems are frequently used for monitoring purposes, controlling AUVs or speech communication, using comparably low data-rates.  Nearly all commercially available modems use different modulation schemes and are capable of different data-rates. In this seminar the used modulation schemes, the data-rates and transmit power of the available modems should be examined and discussed.  Conclusively, the robustness and the possible range of the modems should be addressed and a recommendation for a suitable modulation scheme for a short to mid-range speech communication should be given.

Data Fusion for Bi-
and Multistatic
SONAR Systems

Active SONAR systems rely on projectors and hydrophones in order to accumulate and process data for target detection purposes. While with monostatic systems the transmit and receive beam directions can be adjusted coherently due to no spatial offset of the hardware, bi- and multistatic systems require a more complex control algorithm. The separately positioned arrays need to combine their beamformers beam direction such that the SONAR output plot can be populated most efficiently. The goal of this seminar is to find and summarize literature about such data fusion algorithms and its application in multistatic SONAR systems.