Sökning: "jamming"

Visar resultat 11 - 15 av 31 avhandlingar innehållade ordet jamming.

  1. 11. Risk Analysis of Intentional Electromagnetic Interference on Critical Infrastructures

    Författare :Benjamin Donald Oakes; Sven Ove Hansson; Per Näsman; Mats Bäckström; Mathias Ekstedt; KTH; []
    Nyckelord :HUMANIORA; HUMANITIES; Filosofi; Philosophy; Planering och beslutsanalys; Planning and Decision Analysis;

    Sammanfattning : Our modern society depends on the functioning and interplay of a wealth of infrastructures. Practicallyall of these infrastructures are in some form or another, dependent on electrical and electronicsystems. LÄS MER

  3. 12. On the Adaptive Array Problem

    Författare :Mats Viberg; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Direction-of-Arrival; Signal to Noise Ratio; Adaptive array problem; Radio communication system;

    Sammanfattning : By an array we mean a set of coupled sensors, typically antenna elements. The array receives superimposed signals from distant sources. By combining the outputs of the sensors in different ways, one can change the array sensitivity to different Directions-of-Arrival (DOA). LÄS MER

  4. 13. Secrecy in Cognitive Radio Networks

    Författare :Frederic Gabry; Mikael Skoglund; Merouane Debbah; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : With the considerable growth of wireless networks in recent years, the issue of network security has taken an important role in the design of communication devices and protocols. Indeed, due to the broadcast nature of these networks, communications can potentially be attacked by malicious parties, and therefore, the protection of transmitted data has become a main concern in today's communications. LÄS MER

  5. 14. A numerical study on orientational arrest and size segregation of dense particle flows using discrete element modeling

    Författare :Zakiyeh Yousefian; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; particle flows; dense suspensions; granular materials;

    Sammanfattning : The thesis focuses on studying dense particle flows, which are either dry or submerged in a Newtonian fluid through two dimensional numerical simulations using the discrete element method (DEM). The First paper deals with dense suspensions in viscous regime under oscillatory planar shear. LÄS MER

  7. 15. Numerical study of dense particle flows under planar shear

    Författare :Junhao Dong; Beräkningskemi; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dense suspension; granular flow; shear thickening; oscillatory flow; rheology; Discrete element method;

    Sammanfattning : In this thesis I conducted numerical simulations to study the flow behavior of dense particle flows composed of hard particles under planar shear using the discrete element method. The simulations were carried out in two dimensional systems, where the particles are modelled as circular discs. The discs are non-Brownian and neutrally buoyant. LÄS MER