Sökning: "DPSS"

Hittade 5 uppsatser innehållade ordet DPSS.

  1. 1. A Logistical Perspective on Dynamic Purchasing Systems : Investigating the Supplier Perspective

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för ekonomi, teknik, konst och samhälle

    Författare :Charlie Barron; [2023]
    Nyckelord :Dynamic Purchasing Systems; Public Procurement;

    Sammanfattning : This study investigates Dynamic Purchasing Systems’ (DPS) supplier perspectiveand frameworks’ supplier perspective. DPSs were introduced in to the Swedish 2016procurement laws and few studies have been conducted looking into the procedurein a logistical view. LÄS MER

  3. 2. Adaptive clutter suppression in airborne surveillance radar

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Sabina Björk; [2021]
    Nyckelord :Clutter suppression; Radar; STAP;

    Sammanfattning : Air- and spaceborne radars play an important role for civilian and military use. There are numerous applications such as earth observations, surveillance and others. High performance clutter suppression is a crucial part of many of these radar systems. LÄS MER

  4. 3. Airborne Radar Ground Clutter Suppression Using Multitaper Spectrum Estimation & Choosing DPSS Parameters

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

    Författare :Carl-Henrik Hanquist; [2018]
    Nyckelord :DPSS; Multitaper; Radar;

    Sammanfattning : One of the biggest challenges in any airborne radar is to distinguish a target from a strong ground echo. The main problem is that the ground echo, called ground clutter, can be up to a million times stronger than the response from the target in question. LÄS MER

  5. 4. 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

  7. 5. Channel estimation in mobile wireless systems

    Uppsats för yrkesexamina på avancerad nivå, KTH/Signalbehandling

    Författare :Pazi Alli Idd; [2012]
    Nyckelord :Time-variant channel; Discrete Prolate Spheroidal Sequences DPSS ;

    Sammanfattning : The demands of multimedia services from mobile user equipment (UE) for achieving high data rate, high capacity and reliable communication in modern mobile wireless systems are continually ever-growing. As a consequence, several technologies, such as the Universal Mobile Telecommunications System (UMTS) and the 3rd Generation Partnership Project (3GPP), have been used to meet these challenges. LÄS MER