Sökning: "Spatial Multiplexing"

Visar resultat 11 - 15 av 44 avhandlingar innehållade orden Spatial Multiplexing.

1. 11. Doctoral Thesis: Massive MIMO in Real Propagation Environments

   Författare :Xiang Gao; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Massive MIMO; very-large MIMO; multi-user MIMO; channel measurements; channel modeling; 5G; sum-rate capacity; antenna selection; signal processing;

   Sammanfattning : Mobile communications are now evolving towards the fifth generation (5G). In the near future, we expect an explosive increase in the number of connected devices, such as phones, tablets, sensors, connected vehicles and so on. Much higher data rates than in today's 4G systems are required. LÄS MER

3. 12. Adaptation in multiple input multiple output systems with channel state information at transmitter

   Författare :Jinliang Huang; Svante Signell; Anders Ahlén; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MIMO; adaptive modulation; power allocation; spectral efficiency; CSI; Electrical engineering; Elektroteknik;

   Sammanfattning : This thesis comprises two parts: the first part presents channel-adaptive techniques to achieve high spectral efficiency in a single user multiple-input multiple-output (MIMO) system; the second part exhibits a programmable and reconfigurable software-defined-radio orkbench(SDR-WB) in the Matlab/Octave environment that accommodates a variety of wireless applications. In an attempt to achieve high spectral efficiency, an adaptive modulation technique is applied at the transmitter to vary the data rate depending on the channel state information (CSI). LÄS MER

4. 13. Unraveling the potential of Wireless Sensors in the age of Industry 4.0

   Författare :Smruti Ranjan Panigrahi; Mats Bengtsson; Niclas Björsell; Pierluigi Salvo Rossi; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Human civilization is now staring at the fourth industrial revolution, where wireless technologies will play a pivotal role in its success. Wireless sensors’ role is also becoming more significant in the present day to facilitate industrial automation and manufacturing processes and address health, safety, and environmental concerns. LÄS MER

5. 14. Beyond Massive MIMO : Trade-offs and Opportunities with Large Multi-Antenna Systems

   Författare :Juan Vidal Alegría; Kommunikationsteknologi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MIMO; massive MIMO; cell-free massive MIMO; Decentralized multi-antenna architectures; Decentralized schemes; WAX decomposition; LIS; Reconfigurable surfaces; RIS; IRS; ARIS; FRIS;

   Sammanfattning : After the commercial emergence of 5G, the research community is already putting its focus on proposing innovative solutions to enable the upcoming 6G. One important lesson put forth by 5G research was that scaling up the conventional multiple-input-multiple-output (MIMO) technology by increasing the number of antennas could be extremely beneficial for effectively multiplexing data streams in the spatial domain. LÄS MER

7. 15. Hardware Implementation of Baseband Processing for Massive MIMO

   Författare :Hemanth Prabhu; Integrerade elektroniksystem; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Massive MIMO; Hardware architectures; ASIC design; precoding detection;

   Sammanfattning : In the near future, the number of connected mobile devices and data-rates are expected to dramatically increase. Demands exceed the capability of the currently deployed (4G) wireless communication systems. LÄS MER