Sökning: "phase modulation"

Visar resultat 11 - 15 av 77 uppsatser innehållade orden phase modulation.

  1. 11. Commissioning and Testing of a Novel Buck-Boost Phase-Modular Three-Phase AC/DC Converter with Low Component Number

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

    Författare :Saransh Chhawchharia; [2022]
    Nyckelord :;

    Sammanfattning : In this thesis, a 1kW hardware prototype of a three-phase inverting buck-boost converter, termed as 6 Switch Buck-Boost Y-Inverter (6YI) is commissioned and tested. The 6YI is designed to be used as a motor drive for renewable energy applications such as fuel cell, solar etc powered motor drives with wide input voltage capability. LÄS MER

  3. 12. Hybrid Coupler for LMBA Input Match Using an Active Inductor

    Magister-uppsats, Linköpings universitet/Elektroniska Kretsar och System

    Författare :Karthik Doddanna; [2021]
    Nyckelord :LMBA; gyrator-c; active inductor; hybrid coupler; TSMC 0.18um.;

    Sammanfattning : With the increase in demand for compact and high data rate communication systems, there is a need for high efficiency with modulated signals (PAPR 5-10 dB) for base-station power amplifiers. One of the famous architectures used to achieve this is Doherty architecture. LÄS MER

  4. 13. Simulation of a Current Controller with Dead-Time Compensation

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Johanna Heide; Mattias Granström; [2021]
    Nyckelord :control theory; simulation; current controller; dead-time; dead-time compensation; pmsm; c-caller; linköping university; ABB;

    Sammanfattning : This master's thesis is divided into two parts. The first part concerns the development of a simulation model of a current controller and a physical drive unit, both implemented in Simulink with the use of legacy code and regulated with field oriented control. The second part concerns the development of a dead-time compensation algorithm. LÄS MER

  5. 14. Waveform agility for robust radar detection and jamming mitigation

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Karl-Johan Hällgren; [2021]
    Nyckelord :radar; electronic warfare; jamming; jamming resistance; waveforms; phase codes; MIMO; radar; telekrig; störning; störskydd; vågformer; faskoder; MIMO;

    Sammanfattning : In this report metrics for jamming resistance and radar performance of waveform sets are described and developed, and different sets of waveforms are optimized, evaluated and compared. It is shown that without additional processing or PRI jitter, waveform sets can reach jamming resistance a few dB worse than what is provided by PRI jitter alone, and together with PRI jitter a few dB better. LÄS MER

  7. 15. Phase control with spatial-light modulators towards application for opto-optical modulation

    Kandidat-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Isa Hendriks; [2020]
    Nyckelord :phase control; spatial-light modulator; simulation; spatial phase profile; opto-optical modulation; Physics and Astronomy;

    Sammanfattning : This project is about focusing a Gaussian laser beam that has a spatial phase profile applied by a spatial light modulator. The goal is to be able to control the shape, position and phase of the peak at the focus and to split up the peak at the focus into several peaks. LÄS MER