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.
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Showing 1 to 6 of 6 for “"distortion compensation"”.
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Latency and Distortion compensation in Augmented Environments using Electromagnetic trackers
… or ferrous materials due to magnetic field distortion without expensive calibration techniques. In our work we focus on both the prediction and distortion compensation aspects of this application, developing a “small footprint” predictive filter for display lag compensation and a simplified …
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Selected Reflector Antenna Studies
… The topics dicussed are reflector surface distortion, compensation and detection; reflector near-field analysis; and reflector antenna surface shaping. Each chapter of the thesis covers one topic and is self-contained. The most important aspects of this work are a comprehensive analysis of …
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Digital predistortion of RF amplifiers using baseband injection for mobile broadband communications
… operate in nonlinear region where they produce distortion that significantly degrades the quality of signal at transmitter’s output. With the aim of reducing this distortion and improve signal quality, digital predistortion (DPD) techniques are widely used. This work focuses on improving the …
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Advanced digital predistortion of power amplifiers for mobile and wireless communications
… of existing linearisation and memory-effects compensation techniques and reveals the current issues in the field. Further, the thesis depicts the proposed solutions to the problems, including the developed in-band distortion modelling technique, model extraction methods, memoryless digital …
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Design and analysis of digital watermarking, information embedding, and data hiding systems
… performance is characterized by achievable rate-distortion-robustness trade-offs, and this framework leads quite naturally to a new class of embedding methods called quantization index modulation (QIM). These QIM methods, especially when combined with postprocessing called distortion …
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Adaptive Pre-Distort.ion for Laser Diodes with Direct Modulation Frequencies up to 1 GHz
… up to 1 GHz, a third-order Volterra predistortion circuit has been added to the laser module studied. Manual optimization of the pre-distorter coefficients has reduced the optical 2nd and 3rd harmonic distortion between 600 and 1000 MHz to less than -69 dBc, an improvement from …