Sökning: "indoor positioning"

Visar resultat 6 - 10 av 19 avhandlingar innehållade orden indoor positioning.

  1. 6. Channel Estimation Aspects of Reconfigurable Intelligent Surfaces

    Författare :Doga Gürgünoglu; Gabor Fodor; Emil Björnson; Jaap van de Beek; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reconfigurable intelligent surface; channel estimation; pilot contamination; positioning; angle of arrival estimation; integrated sensing and communications; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : In the sixth generation of wireless communication systems (6G), there exist multiple candidate enabling technologies that help the wireless network satisfy the ever-increasing demand for speed, coverage, reliability, and mobility. Among these technologies, reconfigurable intelligent surfaces (RISs) extend the coverage of a wireless network into dead zones, increase capacity, and facilitate integrated sensing and communications tasks by consuming very low power, thus contributing to energy efficiency as well. LÄS MER

  3. 7. Occurrence and fate of emerging and legacy flame retardants : from indoor environments to remote areas

    Författare :Seth Newton; Cynthia de Wit; Ulla Sellström; Matthew MacLeod; Roland Kallenborn; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Flame retardant; emerging; legacy; polybrominated diphenyl ethers; PBDE; HBCDD; long range transport; dust; air; soil; atmospheric deposition; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Persistent organic pollutants (POPs) are toxic chemicals that can be found in various matrices in all corners of the planet, including remote areas such as the Arctic.  Several POPs are known and monitored but given the abundance of new chemicals in commerce about which little is known, chemicals that may be new POPs are constantly being screened for. LÄS MER

  4. 8. Probabilistic modeling for positioning applications using inertial sensors

    Författare :Manon Kok; Thomas Schön; Fredrik Gustafsson; Gabriele Bleser; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : In this thesis, we consider the problem of estimating position and orientation (6D pose) using inertial sensors (accelerometers and gyroscopes). Inertial sensors provide information about the change in position and orientation at high sampling rates. LÄS MER

  5. 9. Radio Resource Management in Bunched Personal Communication Systems

    Författare :Miguel Berg; KTH; []
    Nyckelord :radio resource management; dynamic channel allocation; power control; interference avoidance; link-gain matrix; path-loss measurements; microcells; mobile positioning; trilateration;

    Sammanfattning : The traditional way of increasing capacity in a wirelesscommunication system has been cell splitting and fixedchannel-allocation based on prediction tools. However, theplanning complexity increases rapidly with the number of cellsand the method is not suitable for the large temporal andspatial traffic variations expected in the future. LÄS MER

  7. 10. Increasing Autonomy of Unmanned Aircraft Systems Through the Use of Imaging Sensors

    Författare :Piotr Rudol; Andrzej Szalas; Pascual Campoy; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UAV; UAS; UAV autonomy; human-body detection; color-thermal image fusion; vehicle tracking; geolocation; UAV indoor navigation;

    Sammanfattning : The range of missions performed by Unmanned Aircraft Systems (UAS) has been steadily growing in the past decades thanks to continued development in several disciplines. The goal of increasing the autonomy of UAS's is widening the range of tasks which can be carried out without, or with minimal, external help. LÄS MER