Search for dissertations about: "communications"

Showing result 21 - 25 of 1115 swedish dissertations containing the word communications.

  1. 21. The Limits of the New Public Diplomacy : Strategic communication and evaluation at the U.S. State Department, Foreign & Commonwealth Office, British Council, Swedish Foreign Ministry and Swedish Institute

    University dissertation from Stockholm : Department of Journalism, Media and Communication (JMK), Stockholm University

    Author : James Pamment; Stockholms universitet.; [2011]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Media and Communication Studies; Medie- och kommunikationsvetenskap; SOCIAL SCIENCES Other social sciences Media and communication studies; SAMHÄLLSVETENSKAP Övrig samhällsvetenskap Medie- och kommunikationsvetenskap; Communication Studies; medie- och kommunikationsvetenskap; Public Diplomacy; Strategic Communication; International Political Communication; Evaluation; Influence; Soft Power; Nation Brands;

    Abstract : The new public diplomacy is a major paradigm shift in international political communication. Globalisation and a new media landscape challenge traditional foreign ministry ‘gatekeeper’ structures, and foreign ministries can no longer lay claim to being sole or dominant actors in communicating foreign policy. READ MORE

  2. 22. Algorithms and Proofs of Concept for Massive MIMO Systems

    University dissertation from The Department of Electrical and Information Technology

    Author : Joao Vieira; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; massive MIMO; Algorithms; Testbeds; Deep Learning; Generalized Method of Moments;

    Abstract : This thesis focuses on algorithms and proofs of concepts in the area of wireless systems operating with a large number of antennas, especially at the base station side.The first studied topic concerns the design and implementation of massive multiple-input multiple-output (MIMO) testbeds, primarily for communications. READ MORE

  3. 23. Wireless Channel Modeling and Reconstruction in Massive MIMO Systems

    University dissertation from Univeristy of Otago

    Author : Aleksei Fedorov; Lunds universitet.; Lund University.; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel modeling; 5G; 4G; LTE; MIMO; massive MIMO; localization; channel reconstruction; channel prediction; channel estimation; pilot contamination; phase noise; antenna array; orientation reconstruction; orientation estimation; channel inference; 3D channel modeling; realistic channel modeling; phase shifting; RACH synchronization; massive MIMO emulation; location estimation; system identification;

    Abstract : The past few years have witnessed dramatic growth in the number of wirelessly connected devices, which will continue to increase in the future. Following this trend, the capacity of the wireless networks has been enhanced to provide high-quality service to tens of billions of devices. READ MORE

  4. 24. Channel Shortening in Wireless Communication

    University dissertation from Department of Electrical and Information Technology, Lund University

    Author : Sha Hu; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2017-12-22]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Channel shortening CS ; multi-input multi-output MIMO ; intersymbol interference ISI ; achievable information rate AIR ; partial marginalization PM ; dirty paper coding DPC ; large intelligent surface LIS ; Cramér-Rao lower bound CRLB ;

    Abstract : The concept of Channel Shortening (CS) is a well-known technique that has a rich history over 40 years. CS transfers linear vector channels such as multi-input multi-output (MIMO) and intersymbol interference (ISI) channels into ``shortened'' versions, for the purpose of reducing demodulation-complexity and improving data-transmission performance. READ MORE

  5. 25. Spatially Coupled Turbo-Like Codes

    University dissertation from Electrical and Information Technology, Lund University

    Author : Saeedeh Moloudi; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The focus of this thesis is on proposing and analyzing a powerful class of codes on graphs---with trellis constraints---that can simultaneously approach capacity and achieve very low error floor. In particular, we propose the concept of spatial coupling for turbo-like code (SC-TC) ensembles and investigate the impact of coupling on the performance of these codes. READ MORE