Search for dissertations about: "free-running oscillator"
Showing result 1 - 5 of 7 swedish dissertations containing the words free-running oscillator.
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1. Low Noise Oscillator in ADPLL toward Direct-to-RF All-digital Polar Transmitter
Abstract : In recent years all-digital or digitally-intensive RF transmitters (TX) have attracted great attention in both literature and industry. The motivation is to implement RF circuits in a manner suiting advanced nanometer CMOS processes. To achieve that, information is encoded in the time-domain rather than voltage amplitude. READ MORE
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2. Phase Noise in Communication Systems--Modeling, Compensation, and Performance Analysis
Abstract : The continuous increase in demand for higher data rates due to applications with massive number of users motivates the design of faster and more spectrum efficient communication systems. In theory, the current communication systems must be able to operate close to Shannon capacity bounds. READ MORE
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3. Modeling and Estimation of Phase Noise in Oscillators with Colored Noise Sources
Abstract : The continuous increase in demand for higher data rates due to applications with massive number of users motivates the design of faster and more spectrum efficient communication systems. In theory, the current communication systems must be able to operate close to Shannon capacity bounds. READ MORE
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4. Spectral Management in Quasi-Phase-Matched Parametric Devices
Abstract : Nonlinear optical interaction in quasi-phase-matched structures opens up unique possibilities to build compact and efficient parametric devices such as optical parametric oscillators, generators, and amplifiers with tailored spectral properties. The focus of this thesis is on novel parametric interactions with periodically-poled KTiOPO4 (PPKTP) as the parametric gain medium. READ MORE
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5. Self-Homodyne Coherent Systems using Advanced Modulation Formats
Abstract : Modulation formats that offer high spectral efficiency will be of great importance in future fiber optic communication systems. Currently, a lot of research effortsare ongoing to investigate the best ways of generating and detecting modulation formats in which both the phase and the amplitude of the light are used to carry information, such as 16-QAM. READ MORE