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Visar resultat 1 - 5 av 17 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Channel Related Optimization of Wireless Communication Systems

    Författare :Fredrik Tufvesson; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; time division duplex; multicarrier; Radio communication; orthogonal frequency division multiplex; channel estimation; pilot symbol assisted modulation; sub-channel spacing; sub-channel bandwidth; interchannel interference; cyclic prefix; intersymbol interference; Rayleigh fading; precoding; pre-compensation;

    Sammanfattning : This thesis deals with different optimization problems in the design of wireless communication systems. It is mainly directed to the design of systems based on multicarrier techniques and orthogonal frequency division multiplex, OFDM, but some of the problems apply to single carrier systems as well. LÄS MER

  3. 2. Synchronization and Communication Results in Safety-Critical Real-Time Systems

    Författare :Henrik Lönn; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; scheduling; TDMA; fault tolerance; membership agreement; safety-critical; atomic broadcast; embedded systems; clock synchronization; distributed real-time systems;

    Sammanfattning : A growing number of industrial control applications employ computer control to provide enhanced functionality and reduced cost. Many of these applications are safety-critical and require fault-tolerant techniques to provide an adequate level of safety. LÄS MER

  4. 3. Reliable RFID Communication and Positioning System for Industrial IoT

    Författare :Chuanying Zhai; Hannu Tenhunen; Zhuo Zou; Jari Nurmi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 2.4-GHz UWB hybrid positioning; industrial IoT; MF-TDMA; QoS; reliable communication; RFID; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : The Internet of Things (IoT) has the vision to interconnect everything of the physical world and the virtual world. Advanced automated and adaptive connectivity of objects, systems, and services is expected to be achieved under the IoT context, especially in the industrial environment. Industry 4. LÄS MER

  5. 4. Relaying for Timely and Reliable Applications in Wireless Networks

    Författare :Le-Nam Hoang; Elisabeth Uhlemann; Magnus Jonsson; Anthony Ephremides; Högskolan i Halmstad; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Many emerging applications based on wireless networks involve distributed control. This implies high requirements on reliability, but also on predictable maximum delay. Further, for applications, it is vital to use off-the-shelf components, both due to cost constraints and requirements on interoperability with existing networks. LÄS MER

  7. 5. Device-to-Device Communication in Future Cellular Networks : Resource allocation and mode selection

    Författare :Demia Della Penda; Mikael Johansson; Ioannis Krikidis; KTH; []
    Nyckelord :Wireless communication; cellular networks; device to device; resource management; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : The widespread use of smart devices and mobile applications is leading to a massive growth of wireless data traffic. Supporting the upcoming demands of data volume, communication rate, and system capacity requires reconsideration of the existing network architecture. LÄS MER