About us

The Signal Processing for wireless positioning group is working under the Laboratory of Electronics and Communications Engineering (ELT) at the Tampere University of Technology (TUT). The group location is in Hervanta campus, Tampere, Finland. The group is led by Associate Professor Elena-Simona Lohan.

Our target is to perform research and provide teaching in the area of mobile wireless positioning. Currently, our main research directions are on cognitive positioning algorithms for seamless indoor-outdoor localisation and Location Based Services supporting the citizens' well-being in a smart city concept.

The group expertise and research interests encompass the following topics: baseband receiver processing such as acquisition and tracking, Binary Offset Carrier (BOC) modulation studies, Wireless positioning (UMTS/WCDMA mobile positioning, Galileo, GPS and modernised GPS, GLONASS, Beidou), CDMA signal processing algorithms, GNSS receiver design, accurate tracking in multipath channels, unambiguous acquisition of BOC/MBOC signals, sidelobe cancellation methods, indoor fading channel modelling, carrier To Noise Ratio (CNR) estimators, pseudolite-based positioning, indoor & urban positioning and urban channel modelling, carrier phase estimators, Simulink-based models for Galileo and GPS receivers, WLAN-based positioning and cooperative positioning, cellular based positioning, user-driven Location Based Services, user surveys and statistical analysis, compressed sensing for WLAN localisation, 3D localisation and floor detection, spectrum sensing for location purposes, signals of opportunity, 5G positioning, convergence of communication and navigation signals, users mobility models, privacy and physical layer security in mobile localisation.

The group was founded in 2003, following the PhD Dissertation of E.S. Lohan on "Multipath delay estimators for fading channels with applications in CDMA receivers and mobile positioning" . Since then, 7 other PhD theses have been completed with full or partial supervision of E.S. Lohan, on the following topics:

  1. 1.

    A. Lahkzouri, "Channel Estimation and Mobile Phone Positioning in CDMA Based Wireless Communication Systems" (2005)

  2. 2.

    A. Burian, "Reduced-Complexity Code Synchronization in Multipath Channels for BOC-Modulated CDMA Signals with Applications in Galileo and Modernized GPS Systems" (2009)

  3. 3.

    D. Skournetou, "Mitigation of Dominant Channel Propagation Effects in GNSS-based Positioning" (2011)

  4. 4.

    Z. Bhuiyan, "Analysis of Multipath Mitigation Techniques for Satellite-based Positioning Applications" (2012)

  5. 5.

    J. Zhang, "Advanced Signal Processing in Multi-mode Multi-frequency Receivers for Positioning Applications" (2013)

  6. 6.

    J. Talvitie, "Algorithms and Methods for Received Signal Strength Based Wireless Localization" (2016)

  7. 7.

    E. Laitinen, "Physical Layer Challenges and Solutions in Seamless Positioning via GNSS, Cellular and WLAN Systems" (2017)

More than 36 students have also completed their MSc theses on topics related to the TLTPOS research. The theses are available on Dpub repository at TUT

The TLTPOS research group is one of the total of five wireless positioning and/or GNSS related research groups at TUT, the other four groups in the largest wireless positioning & GNSS research clusters in Finland being led by Prof. Jari Nurmi, Prof. Robert Piché, Prof. Mikko Valkama and Prof. Jarmo Takala.

The group size has varied over the years. For example, at the beginning of 2016, two post-docs and four PhD students were involved in the TLTPOS research.

Researchers involved in the TLTPOS research group, as of April 2016

The TLTPOS research has been funded over the years by the following main sponsors:

Contact:

Elena-Simona Lohan

Webpage: http://www.cs.tut.fi/~simona/

E-Mail: firstname.surname@tut.fi

Tweeter: @simonalohan

LinkedIn: https://fi.linkedin.com/in/simonalohan