Sökning: "Fast Fourier Transform"

Visar resultat 1 - 5 av 120 uppsatser innehållade orden Fast Fourier Transform.

1. 1. Modeling wave behavior with linear wave theory

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

   Författare :Elsa Renström; [2024]
   Nyckelord :;

   Sammanfattning : This thesis aimed to look at the behaviours of the water beneath waves from a modeling and simulations point of view. We have investigated how to use Linear wave theory (LWT) to model the kinematic movements in water governed by free ocean waves. The model assumes the surface to consist of a superposition of sinusoidal waves. LÄS MER

3. 2. Approach for frequency response-calibration for microphone arrays

   M1-uppsats, KTH/Hälsoinformatik och logistik

   Författare :Jacob Drotz; [2023]
   Nyckelord :microphone array; frequency response; calibration; sine sweep; inverse filter; digital signal processing DSP ; convolution; Fast Fourier Transform FFT ; Discrete Fourier Transform DFT ; acoustic measurements; audio engineering; mikrofonarray; frekvenssvar; kalibrering; sinussvep; inverterat filter; digital signalbehandling; faltning; Fast Fourier Transform FFT ; Discrete Fourier Transform DFT ; akustiska mätningar; ljudteknik;

   Sammanfattning : Matched frequency responses are a fundamental starting point for a variety ofimplementations for microphone arrays. In this report, two methods for frequencyresponse-calibration of a pre-assembled microphone array are presented andevaluated. LÄS MER

4. 3. Vibroacoustic Analysis of an OLTC Diverter Switch for Condition Monitoring : Time frequency analysis with Fourier and wavelet transform in combination with multivariate logistic regression for condition monitoring of OLTC diverter switch

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för systemteknik

   Författare :Simon Persson; [2023]
   Nyckelord :Wavelet transform; CWT; logistic regression; machine learning; ML; vibroacoustic analysis; time frequency analysis; tap changer; diverter switch; power transformer; classification; prediction; condition; vibrations; state prediction; Hitachi Energy;

   Sammanfattning : Vibrations are everywhere around us all the time and we often recognise them as sounds that we can hear and analyse with our brain. In this thesis, data that has been gathered from a diverter switch (DS) in a controlled environment, is analysed. LÄS MER

5. 4. Latency Bounds for Memory-Based FFTs with Applications in OFDM Communication

   Master-uppsats, Linköpings universitet/Institutionen för systemteknik

   Författare :Xiangbin Tan; Tadesse Hadush Negash; [2023]
   Nyckelord :FFT; scheduling; memory-based architecture; latency;

   Sammanfattning : Future communication systems require low latency Fast Fourier transform (FFT)computation with a small cost of area. In this study, a memory-based FFT processorwith low latency is designed. LÄS MER

7. 5. Reconnaissance Radar Robot

   Uppsats för yrkesexamina på grundnivå, Högskolan i Halmstad/Akademin för informationsteknologi

   Författare :Kasper Holm; Erik Henrysson; [2023]
   Nyckelord :radar; signal; processing; signal processing; state; machine; state machine; test; testing; radar testing; radar technology; frequency modulated continuous wave; fmcw; pulse radar; raspberry pi; single board computer; sbc; poe; power over ethernet; mqtt; mqtt package; python; drones; uav; unmanned aerial vehicle; drone detection; radar robot; swedish armed forces; swedish armed forces technical school; fmts; beamforming; fast fourier transform; fft; point cloud; point clustering; software design;

   Sammanfattning : During the last century, various countries' armed forces have used unmanned aerial vehicles, commonly known as drones. In recent years, strives have been made to develop small commercial drones that have allowed the general public to afford and use them for recreational purposes. LÄS MER