Essays about: "wiener filter"

Showing result 1 - 5 of 36 essays containing the words wiener filter.

1. 1. Contribution to the Understanding of the Effects of Propagation through the Ionosphere of P-band SAR Data

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Johannes Samuel Erland Rönner; [2023]
   Keywords : Synthetic aperture radar; Ionosphere;

   Abstract : 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. READ MORE

3. 2. Speckle suppression in ultrasound images of heterogeneous materials

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Simon Johnsson; [2023]
   Keywords : Ultrasound; non-destructive testing; wiener filter; signal processing;

   Abstract : 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. READ MORE

4. 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

   University essay from KTH/Fysik

   Author : Ida Hägnestrand; [2023]
   Keywords : Gamma Knife; Cone-beam computed tomography; Image quality; Image reconstruction; Co-registration; Contrast; Uniformity; Spatial resolution; Scatter correction; Wiener filter; Noise filter; Patient positioning; Stereotactic radiosurgery; Gammakniv; Strålkniv; Cone-Beam Computed Tomography; Bildkvalitet; Bildrekonstruktion; Co-registrering; Kontrast; Uniformitet; Spatial upplösning; Spridningskorrigering; Wienerfilter; Brusfilter; Stereotaktisk strålkirurgi;

   Abstract : 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. READ MORE

5. 4. Deep Learning for Speech Enhancement : A Study on WaveNet, GANs and General CNN-RNN Architectures

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Oscar Xing Luo; [2019]
   Keywords : ;

   Abstract : 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. READ MORE

6. 5. Measurement system for low frequency and low amplitude AC voltage of given frequency

   University essay from Högskolan i Gävle/Elektronik

   Author : Viktor Kaltenböck; [2019]
   Keywords : ;

   Abstract : 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. READ MORE