Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"envelope statistics"”.
-
K-distribution fading models for Bayesian estimation of an underwater acoustic channel
… fluctuations are well characterized by Gaussian statistics, leading to a Rayleigh distributed envelope. However, the envelope statistics of the underwater acoustic communication channel are often better modeled by the K-distribution. In this thesis, by presenting and analyzing field data to …
-
Improved Techniques for Statistical Analysis of the Envelope of Backscattered Ultrasound Using the Homodyned K Distribution
… were developed and assessed based on the envelope of backscattered ultrasound. The envelope of backscattered ultrasound can be modeled as the superposition of the scattered signals from individual scatterers in the medium being interrogated. As such, the envelope signal is statistical in …
-
K-distribution fading models for Bayesian estimation of an underwater acoustic channel
… fluctuations are well characterized by Gaussian statistics, leading to a Rayleigh distributed envelope. However, the envelope statistics of the underwater acoustic communication channel are often better modeled by the K-distribution. In this thesis, by presenting and analyzing field data to …
-
Quantitative ultrasound assessment of thermal therapy in liver
… effective acoustic concentration (EAC), and envelope statistics parameters μ and k were evaluated with respect to their ability to discriminate between heated and unheated liver tissue. Two sets of experiments were conducted for this purpose. In the first, a series of freshly excised and …
-
High frequency ultrasonic characterization of human skin In vivo
… coefficient, backscatter coefficient, and echo envelope statistics were studied for their potential to characterize human skin tissues in vivo. A high frequency ultrasound system was developed using polymer transducers, a pulser/receiver, high-speed digitizer, 3-axis scanning system, and a PC. …