Sökning: "wiener filter"
Visar resultat 1 - 5 av 36 uppsatser innehållade orden wiener filter.
1. Contribution to the Understanding of the Effects of Propagation through the Ionosphere of P-band SAR Data
Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknikSammanfattning : The BIOMASS mission from the European Space Agency (ESA) is designed to measurebiomass and carbon content in Earth’s forests. To account for phase changes caused byionospheric variations, a map-drift autofocus algorithm is developed, which utilises a phasescreen of the ionosphere to eliminate phase errors in the signal. LÄS MER
2. Speckle suppression in ultrasound images of heterogeneous materials
Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknikSammanfattning : Performing non-destructive testing (NDT) on materials is a helpful tool for maintenance and quality control because the materials are not destroyed or disturbed; ultrasound imaging is one type of NDT. Ultrasound imaging of heterogeneous materials contains many echoes from the material itself. LÄS MER
3. Evaluation of a Novel Reconstruction Framework for Gamma Knife Cone-Beam CT - The Impact of Scatter Correction and Noise Filtering on Image Quality and Co-registration Accuracy
Master-uppsats, KTH/FysikSammanfattning : The Gamma Knife is a non-invasive stereotactic radiosurgery system used for treatments of deep targets in the brain. Accurate patient positioning is needed for precise radiation delivery to the target. LÄS MER
4. Deep Learning for Speech Enhancement : A Study on WaveNet, GANs and General CNN-RNN Architectures
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Clarity and intelligiblity are important aspects of speech, especially in a time of misinformation and mistrust. The breakthrough in generative models for audio files has brought massive improvements for speech enhancement. LÄS MER
5. Measurement system for low frequency and low amplitude AC voltage of given frequency
Magister-uppsats, Högskolan i Gävle/ElektronikSammanfattning : This work is about digital signal processing methods to be used to determine information of low frequency low amplitude signals of known frequency. Different adaptive filter concepts such as Wiener filter, NLMS filter and lock-in are implemented and compared to each other. LÄS MER