Sökning: "positioning system"

Visar resultat 21 - 25 av 263 avhandlingar innehållade orden positioning system.

1. 21. 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. 22. On the trade-off between uncertainty and delay in UWB and 5G localization

   Författare :Gabriel Garcia; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultra-wideband; MIMO; positioning; MAC delay; localization; 5G; initial access; millimeter-wave; multipleinput multiple output;

   Sammanfattning : Location-aware technologies in combination with emerging wireless communication systems have revolutionized many aspects of our daily lives by means of applications within the commercial, public and military sectors. Ultra-wideband (UWB) and 5G stand out as emerging radio frequency (RF) based technologies that tackle the limitations of Global Positioning System solutions. LÄS MER

4. 23. Objective Analysis Methods in the Mechanics of Sports

   Författare :Mikael Swarén; Anders Eriksson; Vesa Linnamo; KTH; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sports equipment; test methods; sports mechanics; biomechanics; performance analysis; tracking; positioning system; pacing; alpine skiing; cross-country skiing; poles; helmets;

   Sammanfattning : Sports engineering can be considered as the bridge between the knowledge of sports science and the principles of engineering and has an important role not only in improving the athletic performance, but also in increasing the safety of the athletes. Testing and optimization of sports equipment and athletic performance are essential for supporting athletes in their quest to reach the podium. LÄS MER

5. 24. Resonator sensor technique for medical use : an intraocular pressure measurement system

   Författare :Anders Eklund; Umeå universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sensor; Vibration; Hardness; Prostate; intraocular pressure; resonator; eye; applanation; glaucoma;

   Sammanfattning : In the work of this doctoral dissertation a new resonator sensor technique, first presented in 1989, has been further developed and evaluated with focus on technical characteristics and applications within the medical field. In a first part a catheter-type tactile sensor using the resonator sensor technique was evaluated in a silicone model and applied to human prostate in vitro. LÄS MER

7. 25. Amatör eller professionist? : Studier rörande amatörfrågan i svensk tävlingsidrott 1903-1967

   Författare :Karin Wikberg; Klas Åmark; Christer Ericsson; Stockholms universitet; []
   Nyckelord :amateur; amateur ideal; amateurism; professionalist professional; professionalism; autonomy; ideology; power; moral; parallel system; hybrid system; Amatör; amatörideal; amatörism; professionist; professionell; professionalism; autonomi; ideologi; makt; moral; parallellsystem; blandsystem;

   Sammanfattning : This thesis studies the amateurism question within Swedish competitive sport from the perspective of the Swedish Sports Confederation (RF). As a background, a study is included about both the early development of Anglo-Saxon amateur sport, as well as the initial phase of the Swedish sports movement (ca. LÄS MER