Sökning: "multi-user MIMO"

Visar resultat 26 - 30 av 30 avhandlingar innehållade orden multi-user MIMO.

  1. 26. Investigation of Sigma-Delta-over-Fiber for High-Capacity Wireless Communication Systems

    Författare :Husileng Bao; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; millimeter-wave; multipleinput- multiple-output; remote radio head; Radio-over-fiber; central unit;

    Sammanfattning : The advent of beyond-5G (B5G) and 6G technologies brings increases in wireless devices and their applications. Although massive multiple-input-multiple-output (MIMO) delivers high-capacity services using co-located MIMO (CMIMO) technology, distributed MIMO (D-MIMO) technology offers a more uniform user service. LÄS MER

  3. 27. Physical Layer Techniques for High Frequency Wireline Broadband Systems

    Författare :Eduardo Lins de Medeiros; Bredbandskommunikation; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Digital Subscriber Line; Multicarrier Modulation; Vectoring; Copper cables; Radio-over-Copper;

    Sammanfattning : This thesis collects contributions to wireline and wireless communication systems with an emphasis on multiuser and multicarrier physical layer technology. To deliver increased capacity, modern wireline access systems such as G.fast extend the signal bandwidth up from tens to hundreds of MHz. LÄS MER

  4. 28. Experimental Verification of Superconductor Digital Circuits

    Författare :Henrik Engseth; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cryocooler.; Superconductivity; Multi Chip Modules MCM ; high frequency test; Rapid Single Flux Quantum RSFQ logic; heatload;

    Sammanfattning : AbstractSuperconducting digital technology based on Rapid Single Flux Quantum (RSFQ) logic offers a 50 times faster clock rate and 100 times less on chip power consumption than today's mainstream semiconductor electronics. This technology is attractive for many applications and in particular for Digital Signal Processing (DSP). LÄS MER

  5. 29. Rate, Reliability and Secrecy Performance Analysis and Optimization for Millimeter WaveCommunications

    Författare :Shaocheng Huang; Ming Xiao; Mikael Skoglund; Marco Renzo; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : With the fast development of electronic devices and computer science, various emerging applications (e.g., virtual and augmented reality, ultra-high-definition three-dimensional video, autonomous driving, big data analysis, etc. LÄS MER

  7. 30. Geometry-based Radio Channel Characterization and Modeling: Parameterization, Implementation and Validation

    Författare :Meifang Zhu; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The propagation channel determines the fundamental basis of wireless communications, as well as the actual performance of practical systems. Therefore, having good channel models is a prerequisite for developing the next generation wireless systems. This thesis first investigates one of the main channel model building blocks, namely clusters. LÄS MER