Search for dissertations about: "Transmission range"

Showing result 11 - 15 of 382 swedish dissertations containing the words Transmission range.

2. 11. Limited Feedback Information in Wireless Communications : Transmission Schemes and Performance Bounds

   Author : Thanh Tùng Kim; Mikael Skoglund; Hesham El Gamal; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diversity-multiplexing tradeoff; Large deviation analysis; Limited feedback; MIMO channels; Relay channels; Telecommunication; Telekommunikation;

   Abstract : This thesis studies some fundamental aspects of wireless systems with partial channel state information at the transmitter (CSIT), with a special emphasis on the high signal-to-noise ratio (SNR) regime. The first contribution is a study on multi-layer variable-rate communication systems with quantized feedback, where the expected rate is chosen as the performance measure. READ MORE

4. 12. Short-range Optical Communications using 4-PAM

   Author : Tamas Lengyel; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Data communication; vertical cavity surface emitting lasers; 4-PAM; IM DD; NRZ OOK; optical interconnects; short-range fiber optic links; multimode fiber; inter-symbol interference; intensity modulation;

   Abstract : As the demand for ever higher throughput short-range optical links is growing, research and industry has shown increased interest in multilevel modulation formats, such as the four leveled pulse amplitude modulation, referred to as 4-PAM. As on-off keying persists to be the choice for low latency applications, such as high performance computing, datacenter operators see 4-PAM as the next format to succeed current OOK-based optical interconnects. READ MORE

5. 13. Improvements of SPECT by a new collimator design and simultaneous transmission-emission tomography

   Author : Shahrokh Kimiaei; Marija Ivanovic; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gamma camera; SPECT; Emission tomography; Transmission tomography; Planar-concave collimators; Spatial resolution; Other physics; Övrig fysik; medicinsk strålningsfysik; Medical Radiation Physics;

   Abstract : SPECT (Single Photon Emission Computed Tomography) and planar scintigraphy are the most established and world wide-spread nuclear medicine imaging techniques for clinical use today. SPECT is a tomographic technique that allows 3-D visualization of biochemical processes or physiological flow in the human body by external detection of photons from an administered radiopharmaceutical. READ MORE

6. 14. Dissemination of Multiresistant Bacteria : Their Selection, Transmission, Virulence and Resistance

   Author : Gustaf Starlander; Åsa Melhus; Jørgen Vildershøj Bjørnholt; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk bakteriologi; Clinical Bacteriology;

   Abstract : Multiresistant bacteria are an emerging threat in modern medicine. Consumption of antimicrobial agents among humans, animals and in agriculture causes a selection of resistance genes. READ MORE

7. 15. Augmented Telepresence based on Multi-Camera Systems : Capture, Transmission, Rendering, and User Experience

   Author : Elijs Dima; Mårten Sjöström; Roger Olsson; Charalambos Poullis; Mittuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract :  Observation and understanding of the world through digital sensors is an ever-increasing part of modern life. Systems of multiple sensors acting together have far-reaching applications in automation, entertainment, surveillance, remote machine control, and robotic self-navigation. READ MORE