Sökning: "multi input multi output"

Visar resultat 21 - 25 av 147 avhandlingar innehållade orden multi input multi output.

1. 21. High Repetition Rate Laser Diagnostics for Combustion Applications

   Författare :Johan Sjöholm; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spray; diesel; optical engine; simultaneous; laser-induced fluorescence; fuel tracer; SLIPI; Raman; LII; laser diagnostic; combustion; high repetition rate; high-speed; PLIF; multi-YAG; LIF; fuel jet; Fysicumarkivet A:2012:Sjöholm;

   Sammanfattning : High repetition rate laser diagnostics has proven to be a useful tool for studying combustion phenomena. Laser techniques are, in general, relatively non-intrusive and have the potential to measure specific species at very low concentrations and with extremely high temporal resolution. LÄS MER

3. 22. Securing Interactive Systems

   Författare :Willard Thor Rafnsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; program analysis; concurrency; multi-threading; covert channels; semantics-based security; language-based security; information-flow security; runtime enforcement; parallelism; scheduling; program transformation; information-flow control; fairness;

   Sammanfattning : This thesis provides means to achieve end-to-end information-flow security in interactive systems. The elusiveness of this problem stems from the fact that interaction patterns, primitives, synchronous communication and nondeterminism combine in ways where seemingly innocuous systems compromise security in unexpected ways under interaction. LÄS MER

4. 23. Verification of wireless communication performance and robustness for automotive applications

   Författare :Mikael Nilsson; Kommunikationsteknologi; []
   Nyckelord :Vehicle-to-Vehicle; V2V; channel modeling; path loss; two-ray; obstruction; large scale fading; shadow fading; multiple links; diversity; correlation; over-the-air; OTA; multi-probe; multipath propagation simulator; fading emulation;

   Sammanfattning : Today's test methods used for verifying the performance and robustness of automotive applications using wireless communication are often based on fieldtrails, which are time consuming, costly, and not repeatable. Therefore, there is an urgent need for new verification methods that can be performed in lab environment, where the realistic radio propagation environment can be emulated. LÄS MER

5. 24. Resource Allocation in Multi-Antenna Communication Systems with Limited Feedback

   Författare :David Hammarwall; Björn Ottersten; David Gesbert; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

   Sammanfattning : The use of multiple transmit antennas is considered a key ingredient to significantly improve the spectral efficiency of wireless communication systems beyond that of currently employed systems. Transmit beamforming schemes have been proposed to exploit the spatial characteristics of multi-antenna radio channels; that is, multiple-input single-output (MISO) channels. LÄS MER

7. 25. MIMO Transceiver Design for Multi-Antenna Communications over Fading Channels

   Författare :Simon Järmyr; Björn Ottersten; Antonio Pascual-Iserte; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : In wireless communications, the use of multiple antennas for both transmission and reception is associated with performance gains of fundamental nature. One such gain stems from the spatial-multiplexing capabilities of wireless multiple-input multiple-output (MIMO) channels: Many propagation environments admit several data streams to be conveyed in parallel over a single point-to-point link, setting the stage for significantly increased data rates. LÄS MER