Sökning: "mobile radio systems"

Visar resultat 21 - 25 av 133 avhandlingar innehållade orden mobile radio systems.

1. 21. Parameter Estimation for Mobile Positioning Applications

   Författare :Parinaz Kasebzadeh; Fredrik Gustafsson; Gustaf Hendeby; Carsten Fritsche; Fredrik Gunnarsson; Jussi Collin; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The availability and reliability of mobile positioning algorithms depend on both the quality of measurements and the environmental characteristics. The positioning systems based on global navigation satellite systems (GNSS), for example, have typically a few meters accuracy but are unavailable in signal denied conditions and unreliable in multipath environments. LÄS MER

3. 22. Sensor Networks and Their Radio Environment : On Testbeds, Interference, and Broken Packets

   Författare :Frederik Hermans; Per Gunningberg; Edith Ngai; Andreas Terzis; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sensor networks; Testbed; Mobility; Interference classification; Packet corruption; Computer Science with specialization in Computer Communication; Datavetenskap med inriktning mot datorkommunikation;

   Sammanfattning : Sensor networks consist of small sensing devices that collaboratively fulfill a sensing task, such as monitoring the soil in an agricultural field or measuring vital signs in a marathon runner. To avoid cumbersome and expensive cabling, nodes in a sensor network are powered by batteries and communicate wirelessly. LÄS MER

4. 23. Coopetition for Mobile Service Provisioning : Is it about infrastructures, services or both?

   Författare :Amirhossein Ghanbari; Jan Markendahl; Anders Henten; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Coopetition; ICT; Wireless; Co-creation; Value; Business; Informations- och kommunikationsteknik; Information and Communication Technology;

   Sammanfattning : As a means of enhancing our everyday lives, ICT industry has caused and experienced significant transformations during past two decades. This transformation relates to technological advances within ICT, and beyond the ICT ecosystem. Wireless ICT is also not an exception in this regard. LÄS MER

5. 24. High Datarate Solutions for Next Generation Wireless Communication

   Författare :Zhongxia Simon He; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Modem; HBT; Harmonic Generation; Injection Locking; Differential Encoder; 16-QAM; E-band; mHEMT; Mobile Backhaul; D-QPSK; Point-to-point Radio; 8-PSK; Carrier Recovery; High Definition Video Transmission; MMIC; Wireless Data Center; QPSK; FPGA; OOK;

   Sammanfattning : Next generation wireless communication systems are essential components in order to increase the capacity of existing digital networks. Channel bandwidth as wide as several gigahertz is generally available at millimeter wave frequencies. LÄS MER

7. 25. Secure Tactical Communications for Inter-Organizational Collaboration : The Role of Emerging Information and Communications Technology, Privacy Issues, and Cyber Threats on the Digital Battlefield

   Författare :Johan Sigholm; Martin Norsell; Anne Persson; Gurpreet Dhillon; Högskolan i Skövde; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Försvarssystem; Systems science for defence and security; Information Systems; Informationssystem IS ;

   Sammanfattning : The development within the area of information and communications technology (ICT) has been rapid during the last couple of decades. Advancements in mobile technology, such as smartphones and other portable devices with embedded sensors, rapid expansion of communications infrastructure, and increased spectrum utilization, has had a major impact on civilian society, but increasingly also on professional organizations such as the Swedish Armed Forces. LÄS MER