Sökning: "Amateur radio"

Hittade 5 uppsatser innehållade orden Amateur radio.

  1. 1. Evaluating LoRa Physical as a Radio Link Technology for use in a Remote-Controlled Electric Switch System for a Network Bridge Radio-Node

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Abdullahi Aden Hassan; Rasmus Karlsson Källqvist; [2019]
    Nyckelord :LoRa; Emergency preparedness; Amateur radio; System design; Embedded system; Radio electronics; LoRa; Krisberedskap; Amatörradio; Systemdesign; Inbyggda system; Radioelektronik;

    Sammanfattning : This report explores the design of a system for remotely switching electronics on and off within a range of at least 15 km, to be used with battery driven radio nodes for outdoor Wi-Fi network bridging. The application of the network bridges are connecting to remote networks, should Internet infrastructure fail during an emergency. LÄS MER

  3. 2. Design of a Federated Framework for Emergency Response

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Qasim Sarfraz; [2017]
    Nyckelord :;

    Sammanfattning : This is a feasibility study exploring the potential of using advanced e-infrastructure mechanisms for federated identity management and service provisioning to support multi-organizational emergency response efforts. The mechanisms explored are primarily similar to the EduGAIN services developed and used by the national and regional research and education network communities with the objective to support international research collaboration. LÄS MER

  4. 3. VHF/UHF Uplink Solutions for Remote Wireless Sensor Networks

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Alp Sayin; [2013]
    Nyckelord :;

    Sammanfattning : The purpose of this thesis was to compare alternative wireless links for transfer of data from sink motes of remote wireless sensor networks to a central repository. A few different protocol stacks to be implemented in the WSN (Wireless Sensor Network) uplink gateway and along with them a few implementation environments based on open source software and low-power hardware were discussed. LÄS MER

  5. 4. Chirp Sounding and HF Application : SDR Technology Implementation

    Kandidat-uppsats, Institutionen för datavetenskap, fysik och matematik, DFM

    Författare :Dino Dautbegovic; [2012]
    Nyckelord :SDR; GNU Radio; Ionosphere; Ionosonde; GNU Chirp Sounder;

    Sammanfattning : From a HF propagation point of view, the ionospheric layers act as partially conducting media (plasma) in which a transmitted radio wave can reflect upon.A way of determining whether a radio wave with a given frequency will reflect from the ionosphere or completely penetrate is to utilize special radar instruments know as ionosondes or chirp sounders. LÄS MER

  7. 5. Trådlöst signalflaggsystem för fotbollsdomare

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Emin Cimic; Besnik Sahiti; [2012]
    Nyckelord :referee paging flag system; radio communications; antenna theory; digital communication; Technology and Engineering;

    Sammanfattning : The purpose of this master thesis was to develop a football referee paging flag system. A paging flag system is an appliance to facilitate the assessment of the game and to improve the communication between the referee and the assistant referees. LÄS MER