Search for dissertations about: "Underlay Spectrum Access"

Found 5 swedish dissertations containing the words Underlay Spectrum Access.

2. 1. On the Performance of Underlay Cognitive Radio Networks with Interference Constraints and Relaying

   Author : Charles Kabiri; Blekinge Tekniska Högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cognitive Radio Networks; Cognitive Cooperative Relay Networks; Underlay Spectrum Access; Interference Constraint; Outage Constraint;

   Abstract : Efficiently allocating the scarce and expensive radio resources is a key challenge for advanced radio communication systems. To this end, cognitive radio (CR) has emerged as a promising solution which can offer considerable improvements in spectrum utilization. READ MORE

4. 2. Performance Analysis of Cognitive Radio Networks with Interference Constraints

   Author : Hung Tran; Blekinge Tekniska Högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cognitive Radio Networks; Spectrum Underlay Access; Interference Constraints; Cognitive Cooperative Radio Networks;

   Abstract : To support the rapidly increasing number of mobile users and mobile multimedia services, and the related demands for bandwidth, wireless communication technology is facing a potentially scarcity of radio spectrum resources. However, spectrum measurement campaigns have shown that the shortage of radio spectrum is due to inefficient usage and inflexible spectrum allocation policies. READ MORE

5. 3. On the Performance Assessment of Advanced Cognitive Radio Networks

   Author : Thi My Chinh Chu; Blekinge Tekniska Högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cognitive Radio Networks; Queueing Analysis; Cooperative Communications; Multiple-Input Multiple-Output MIMO ; Adaptive Modulation and Coding; Hybrid Interweave-Underlay Spectrum Access;

   Abstract : Due to the rapid development of wireless communications together with the inflexibility of the current spectrum allocation policy, radio spectrum becomes more and more exhausted. One of the critical challenges of wireless communication systems is to efficiently utilize the limited frequency resources to be able to support the growing demand of high data rate wireless services. READ MORE

6. 4. Cell-Free Massive MIMO: Distributed Signal Processing and Energy Efficiency

   Author : Zakir Hussain Shaik; Erik G. Larsson; Emil Björnson; Saikat Chatterjee; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : In this era of rapid wireless technological advancements, wireless connectivity between humans, humans with machines, and machines with machines is gradually becoming an absolute necessity. The initial motivation for wireless connectivity was to enable voice communication between humans over a geo-graphical area. READ MORE

7. 5. Multi-Cell Massive MIMO: Power Control and Channel Estimation

   Author : Amin Ghazanfari; Emil Björnson; Erik G. Larsson; Dirk Slock; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Cellular network operators have witnessed significant growth in data traffic in the past few decades. This growth occurs due to the increase in the number of connected mobile devices, and further, the emerging mobile applications developed for rendering video-based on-demand services. READ MORE