Sökning: "Perturbation technique"

Hittade 4 uppsatser innehållade orden Perturbation technique.

  1. 1. Airborne Radar Ground Clutter Suppression Using Multitaper Spectrum Estimation : Comparison with Traditional Method

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Linus Ekvall; [2018]
    Nyckelord :Ground clutter; tapering; multitaper; discrete prolate spheroidal sequences; minumum variance estimation; signal processing; radar; airborne radar;

    Sammanfattning : During processing of data received by an airborne radar one of the issues is that the typical signal echo from the ground produces a large perturbation. Due to this perturbation it can be difficult to detect targets with low velocity or a low signal-to-noise ratio. LÄS MER

  2. 2. Block Diagonalization Based Beamforming

    Master-uppsats, KTH/Teknisk informationsvetenskap

    Författare :Darshan Patil; [2017]
    Nyckelord :;

    Sammanfattning : With increasing mobile penetration multi-user multi-antenna wireless communication systems are needed. This is to ensure higher per-user data rates along with higher system capacities by exploiting the excess degree of freedom due to additional antennas at the receiver with spatial multiplexing. LÄS MER

  3. 3. Steady Periodic Water Waves Solutions Using Asymptotic Approach

    Master-uppsats, Linköpings universitet/Tillämpad matematik

    Författare :Shahid Hasnain; [2011]
    Nyckelord :Steady two dimensional water wave; perturbation approach; separation of variable; pressure head and flow force.;

    Sammanfattning : The aim of this work is to study the relation between two invariants of water flow in a channel of finite depth. The first invariant is the height of the water wave and the second one is the flow force. We restrict ourselves to water waves of small amplitude. LÄS MER

  4. 4. Design of a Cylindrical Cavity Resonator for Measurements of Electrical Properties of Dielectric Materials

    Master-uppsats, Högskolan i Gävle/Avdelningen för elektronik, matematik och naturvetenskap; Högskolan i Gävle/Avdelningen för elektronik, matematik och naturvetenskap

    Författare :Xiang Li; Yan Jiang; [2010]
    Nyckelord :Dielectric constant measurement; Cavity resonator; Dielectric property; TM010 mode; Coupling device; Perturbation technique;

    Sammanfattning : In microwave communications, the main aspects for affecting the dielectric losses in the materials are relating to the dielectric properties and the radiation frequencies. Normally, the different dielectric materials will lead to the different losses and reflections for microwave frequencies. LÄS MER