Essays about: "Radio-waves"

Showing result 11 - 15 of 51 essays containing the word Radio-waves.

  1. 11. Presence detection by means of RF waveform classification

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Max Lengdell; [2022]
    Keywords : presence detection; machine learning; radio wave classification; unsupervised learning; supervised learning; sensor fusion; unsupervised classification;

    Abstract : This master thesis investigates the possibility to automatically label and classify radio waves for presence detection, where the objective is to obtain information about the number of people in a room based on channel estimates. Labeling data for machine learning is time consuming and tedious process. To address this two approaches are evaluated. READ MORE

  3. 12. Screw Joint Analysis in Radio Frequency Filters

    University essay from KTH/Industriell produktion

    Author : Nils Löwhagen; [2022]
    Keywords : Digital filter; Pre-load force; Clamp torque; Release torque; Surface roughness; Thermal shock test; Digitalt filter; Förspänningskraft; Klämvridmoment; Lossdragningsmoment; Ytjämnhet; Termiskt chocktest;

    Abstract : Filter devices are central elements of radio units utilized for modern-day telecommunication. Leakages of radio waves and passive intermodulation are evolving more prominent as the frequency bands become crowded. READ MORE

  4. 13. Ghosts of Our Past: Neutrino Direction Reconstruction Using Deep Neural Networks

    University essay from Uppsala universitet/Högenergifysik

    Author : Sigfrid Stjärnholm; [2021]
    Keywords : neutrino; neural network; ICECUBE; AI; convolutional neural network; CNN; askaryan emission; charged current; neutral current; CC; NC; Keras; TensoFlow; neutrino; neuralt nätverk; ICECUBE; AI; askaryan emission; Keras; TensorFlow;

    Abstract : Neutrinos are the perfect cosmic messengers when it comes to investigating the most violent and mysterious astronomical and cosmological events in the Universe. The interaction probability of neutrinos is small, and the flux of high-energy neutrinos decreases quickly with increasing energy. READ MORE

  5. 14. Hacking Into Someone’s Home using Radio Waves : Ethical Hacking of Securitas’ Alarm System

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Axel Lindeberg; [2021]
    Keywords : penetration testing; threat modeling; IoT; computer security; home alarm system; penetrationstestning; hotmodellering; IoT; datasäkerhet; hemlarmsystem;

    Abstract : The number of IoT systems in our homes has exploded in recent years. By 2025 it is expected that the number of IoT devices will reach 38 billion. Home alarm systems are an IoT product that has increased dramatically in number and complexity in recent years. READ MORE

  6. 15. Radio Emissions from Earth’s Foreshock and Bolides

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Patrick Oppel; [2021]
    Keywords : ;

    Abstract : It is well understood that Earth’s foreshock radiation is due to the bow shock deflecting the solar wind and accelerating electrons upstream into the foreshock where they produce Langmuir waves and radio emissions. Recently, the Long Wavelength Array (LWA) in the USA observed radio waves from meteors and other bolides entering the ionosphere and atmosphere. READ MORE