Search for dissertations about: "signal enhancement"

Showing result 1 - 5 of 156 swedish dissertations containing the words signal enhancement.

2. 1. Speech Signal Extraction : A Multichannel Approach

   Author : Nedelko Grbic; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Speech Enhancement; Blind signal separation; Echo control; Adaptive systems;

   Abstract : In speech signal extraction the aim is to extract human speech in a physical environment by using microphones. In any real world environment there are many disturbance sources that cause unwanted sound pressure, which in turn may degrade the comprehension of the speech at the microphones. READ MORE

4. 2. Signal separation

   Author : Ulf A. Lindgren; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adaptive filtering; blind separation; associated differential equation; non-linear equations; signal enhancement;

   Abstract : .... READ MORE

5. 3. Signal Enhancement in Wireless Communication Systems

   Author : Jörgen Nordberg; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Channel equlization; Multirate Equalization; Signal Separation; Beamforming; Sptial Equalization;

   Abstract : Digital Wireless communications has been one of the fastest growing communication techniques during the last decade. Today there exists several different communication systems that use wireless techniques. They share one common property that they transmit data through a radio interface. READ MORE

6. 4. Signal Separation - II

   Author : Ulf Lindgren; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; local convergence; mutual information; chi square test; signal enhancement; parameter identifiability; source separation; signal separation; algorithms;

   Abstract : Signal separation is a signal processing technique which enables the separation of superimposed signals. There are several practical situations were signal separation can be used, for example in noise reduction for cellular phones subject to background noise. READ MORE

7. 5. Speech enhancement for mobile communications

   Author : Harald Gustafsson; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; speech enhancement; spectral subtraction;

   Abstract : Three major applications of speech enhancement have been studied: noise reduction for mobile telephone handsfree accessories, noise reduction for handheld mobile telephones, and short delay noise reduction for frame-less telephone systems. During conversation, both hearing and speaking adapt to the background noise in a noisy environment. READ MORE