Search for dissertations about: "Linear Modulation"

Showing result 11 - 15 of 124 swedish dissertations containing the words Linear Modulation.

2. 11. On Spectrally Efficient Continuous Phase Modulation

   Author : Tommy Svensson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adjacent channel interference; additive white Gaussian noise {AWGN} ; convolutional codes; minimum Euclidean distance; continuous phase modulation CPM ; bandwidth efficiency; co-channel interference; reduced complexity detectors; optimized phase pulses.;

   Abstract : Spectrally efficient partial response continuous phase modulation (CPM)for wireless links is considered. Continuous phase modulation defines constantenvelope phase codes, which are advantageous when using non-linear amplifiers. READ MORE

4. 12. On Reverberation Enhancement in Auditoria

   Author : Peter Svensson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active sound field control; room acoustics; reverberation enhancement; listening tests; subjective effects; sound-reinforcement; feedback systems; feedback control; computer modelling of acoustics in enclosures; modulation; electro acoustics; time-varying filters;

   Abstract : The analysis of electroacoustic systems for reverberation enhancement in auditoria is the topic of this thesis. Such systems have been developed since the 50's and been commercially available since then as well. During the 80's several new system ideas have been presented but there are still some open questions that are addressed here. READ MORE

5. 13. Nonlinear Interaction Between Ultrasonic Waves and Cracks and Interfaces

   Author : Milan Poznic; Leif Kari; Bruce Drinkwater; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ultrasonic waves; crack; modulation; rough interface; partially closed; surface-breaking; fluid-filled; Acoustics; Akustik;

   Abstract : The subject of this thesis is the development of new ultrasound inspection techniques for detection of cracks that are smaller than the wavelength of the inspecting wave and the characterization of cracks in fluid-filled pipes as either surface-breaking or subsurface. The spectrum of the scattered field of a partially closed crack comprises harmonic components not expected to be found in the case of linear scatterers such as pores or inclusions. READ MORE

6. 14. Channel-Aware Multilevel Coded Modulation for Coherent Fiber-Optic Communications

   Author : Lotfollah Beygi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel model; multidimensional set partitioning; low-complexity de- tector; coded modulation; signal statistics.; nonlinear phase noise; Fiber-optic communications;

   Abstract : The past decades have shown an ever-increasing demand for high-rate Internet services, motivating a great effort to increase the spectral efficiency of optical networks. In general, fiber-optic links are non-Gaussian, and in contrast to additive white Gaussian noise (AWGN) channels, there is no standard framework for quantifying fundamental limits or designing capacity-approaching coding schemes for such channels. READ MORE

7. 15. Evolution and viral mimicry of short linear motif-mediated interactions

   Author : Filip Mihalič; Per Jemth; Leo James; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; phage display; protein-protein interactions; large-scale discovery; short linear motifs; viral mimcry; viral hijacking; Biokemi; Biochemistry; Medical Biochemistry; Medicinsk biokemi;

   Abstract : Proteins are one of the most fundamental building blocks of life and their interactions regulate every cellular process. Historically they have been conceptualized as predominantly folded entities with well-defined secondary and tertiary structures. READ MORE