Bastian Kaulen


M. Sc. Bastian Kaulen

Room D-019
Kaiserstraße 2, 24143 Kiel, Germany
Phone: +49 431 880-6132
Telefax: +49 431 880-6128
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Research: Real-time Signal Processing for Piezoelectric Thin-layer Sensors

In current systems for localization of underwater objects often one transmitting and multiple receiving elements are used to achieve a certain directivity for detection. Conventional piezoelectric ceramics receiving elements are generally large and expensive. During the last years the new piezoelectric thin-layer sensors, developed in collaborative research groups at Kiel University, allow an increased sensor density due to their low cost and their smaller installation space.

One possible application is the installation in a towed sonar. However, the speed of the towing process is limited by the occurrence of disturbances due to the passing water. These disturbances increase exponentially with speed. The cost and space savings of the novel hydrophones not only allow a more precise characterization of the signal degradation due to movement in the water, but could also be used to estimate the occurring disturbances more accurate and thus select less disturbed sensors.

The challenging part arises, because these sensors also record mechanical vibrations, whereby the desired signals are superimposed by unwanted signal components. To reduce this coupling effect and increase the usability of such sensors in measurement environments signal processing techniques are applied. With the help of a temporal-spatial filtering the noise could be minimized directly. In addition to the construction of spatially highly sampled arrays, the equalization of the individual sensors is also important. The sensitivity of the sensors differs depending on the frequency range and can be adjusted by an adapted signal processing.

Related topics:

  • Hydroacoustics
  • Flow noise cancellation and suppression
  • Signal combination
  • Hardware design

Further interests:

  • Real-time digital signal processing
  • Array design
  • Channel / environment simulation

Short CV

2019 - current   Research assistant at the Christian-Albrechts-Universität zu Kiel, Kiel, Germany
2017 - 2018   M.Sc. in Electrical Engineering and Business Administration at the Christian-Albrechts-Universität zu Kiel, Kiel, Germany
2016 - 2017   Internship (R&D) at Dräger Safety AG & Co. KGaA, Lübeck, Germany
2012 - 2017   B.Sc. in Electrical Engineering and Business Administration at the Christian-Albrechts-Universität zu Kiel, Kiel, Germany


    Internal PhD Students


    Rasool Al-Mafrachi
    Christin Bald
    Real-time Signal Processing for Magnetoelectric Sensors
    Eric Elzenheimer
    Medical Signal Processing
    Marco Gimm
    Tobias Hübschen
    Instrumental Quality Assessment for Speech Communication Systems
    Alexej Namenas
    Cognitive-adaptive Target Detection and Tracking for SONAR Systems
    Anton Namenas
    Acoustic Environments and Evaluation of Communication Systems
    Thorben Kaak
    Real-time MIMO Signal Processing for Active SONAR Systems
    Bastian Kaulen
    SONAR Signal Processing
    Minh H. Pham
    Medical Signal Processing
    Robbin Romijnders
    Medical Signal Processing
    Finn Spitz
    Speech Analysis and Therapy for Parkinson Patients
    Elke Warmerdam
    Medical Signal Processing
    Owe Wisch
    Underwater Communication in Real-time MIMO-SONAR-Systems


    Prof. Dr.-Ing. Gerhard Schmidt


    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

    Recent News

    Saturday Morning Physics 2018

    The DSS team was invited to participate in the last of the "Saturday Morning Physics" (SMP) events in 2018. On December 8th, a Saturday of course, Thorben Kaak, Gerhard Schmidt, and Owe Wisch gave a talk on underwater signal processing. Pupils from all around Schleswig-Holstein were quite interested, especially in the basics of SONAR systems.