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 20 of 26 for “"phase synchronization"”.
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Phase synchronization analysis of event-related brain potentials in language processing
… Theorie zur Entdeckung des Phänomens der Phasensynchronisation geführt. Eine dadurch motivierte Datenanalysemethode, die Phasensynchronisations-Analyse, ist bereits mit Erfolg auf empirische Daten angewandt worden. Die vorliegende Dissertation knüpft an diese konvergierenden …
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Phase Synchronization In Three-dimensional Lattices And Globally Coupled Populations Of Nonidentical Rossler Oscillators
A study on phase synchronization in large populations of nonlinear dynamical systems is presented in this thesis. Using the well-known Rossler system as a prototypical model, phase synchronization in one oscillator with periodic external forcing and in two-coupled nonidentical oscillators was …
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Advances in epileptic seizure onset prediction in the EEG with ICA and phase synchronization
… The 2d stage estimates the long term significant phase synchrony dynamics of narrowband (2-8 Hz and 8-14 Hz) seizure components. The synchrony dynamics are assessed with a novel statistic, the PLV-d, analyzing the joint synchrony in two frequency bands of interest.<br/>The 3rd stage creates …
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The investigation of phase synchronization in the cortex during a fatiguing muscle contraction using EEG
Includes bibliographical references (leaves 140-157).
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Investigation of a Correlation Based Technique for Rapid Phase Synchronization in the DVB-S Standard
… DVB-S receiver. In many existing receive chains, synchronization speed is slightly delayed because phase ambiguity cannot be determined and corrected until after Viterbi decoding. Using correlation against known symbols before demodulation, the phase ambiguity can be corrected prior to Viterbi …
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Modeling phase synchronization of interacting neuronal populations : from phase reductions to collective behavior of oscillatory neural networks
… and transmit information in the brain. As such, synchronization phenomena occur across all scales. The coordination of oscillatory activity between cortical regions is hypothesized to underlie the concept of phase synchronization. Accordingly, phase models have found their way into neuroscience. …
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Sequential prediction and decision making, joint community detection and phase synchronization, and acceleration methods for convex optimization
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Sequential prediction and decision making, joint community detection and phase synchronization, and acceleration methods for convex optimization
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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High-precision optical and microwave signal synthesis and distribution
… superposition of mode-locked lasers. Timing and phase synchronization of ultrabroadband Ti:sapphire and Cr:forsterite mode-locked lasers is studied. Subfemtosecond (<0.4 fs) timing synchronization over 12 h is demonstrated. In addition to the timing lock, phase synchronization to a local …
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Synchronization in active networks
… still preserving the complex behavior. Synchronization is a fundamental phenomenon in coupled nonlinear oscillators. Synchronization can be enhanced at different levels, that is, the constraints on which the synchronization appears. Those can be in the trajectory amplitude, requiring the …
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A Model-Based Approach to Demodulation of Co-Channel MSK Signals
… does not always exist for continuous phase modulations. Furthermore, these linear estimators require perfect channel state information and phase synchronization at the receiver, which is not always implemented in wireless communication systems. To overcome these shortcomings of the …
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A Hardware Implementation of a Coherent SOQPSK-TG Demodulator for FEC Applications
… demodulator for shaped offset quadrature phase shift keying, telemetry group version (SOQPSK-TG) for use in forward error correction (FEC) applications. Implementation details for data sequence detection, symbol timing synchronization, carrier phase synchronization, and block recovery are …
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EEG Features of Working Memory Impairment in Alzheimer’s Dementia and Mild Cognitive Impairment
… and alpha power, theta-gamma coupling, and theta phase synchronization. We hypothesized that these EEG features would be most impaired in those with AD, while individuals with MCI would present with less significant impairments. Additionally, we hypothesized that each of these features would be …
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Wireless Neural Recording and Stimulation SoCs for Monitoring and Treatment of Intractable Epilepsy
… multiplication by modifying the ADC sampling phase. It is used in conjunction with 12-bit digital adders and registers to implement 64 16-tap FIR filters with a minimal area and power overhead. In vivo measurement results from freely moving rodents demonstrate its utility in preoperative …
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Target localization in MIMO radar systems
… for target localization relies on time and phase synchronization between transmitting and receiving radars. An analysis of the sensitivity of the localization performance with respect to the variance of phase synchronization error is provided by deriving the hybrid CRLB. The single target …
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Design of flexible actuators using electro-active polymers and CPG-based control strategies
… (CPGs) is presented. The condition for phase synchronization of coupled single chain oscil-lators is derived and various techniques for pattern generation using oscillator network are studied. Finally, octopus based control using Central Pattern Generators (CPGs) is brie y discussed.
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Assessing Neuronal Synchrony and Brain Function Through Local Field Potential and Spike Analysis
… network oscillations and rhythmic neuronal synchronization have led to a number of important insights in recent years, giving us a better understanding of the temporal organization of neuronal activity related to essential brain functions like sensory processing and cognition. Important …
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Synchronization via correlated noise and automatic control in ecological systems
… in a robust way. This method is inspired by phase-locked loops and is based on a feedback loop with a differential control scheme, which allows to change the phases of the controlled systems. The effectiveness of the approach is demonstrated for controlled phase synchronization of regular …
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Epileptic Seizure Detection And Prediction From Electroencephalogram Using Neuro-Fuzzy Algorithms
… used in this study were similarity index, phase synchronization, and nonlinear interdependence. The ANFIS classifier was constructed based on these features as inputs. Fuzzy if-then rules were generated by the ANFIS classifier using the complex relationship of feature space provided during …
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Phase-locked loop, delay-locked loop, and linear decorrelating detector for asynchronous multirate DS-CDMA system
The performance of phase synchronization and code tracking of a digital phase-locked loop (PLL) and delay-locked loop (DLL), respectively, is investigated in wideband asynchronous multirate DS-CDMA system. Dynamic Partial Correlation (DPC) method is proposed to evaluate the autocorrelation and its …
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