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 11 of 11 for “"amplitude modulation AM"”.
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Class E amplifiers and their modulation behaviour
The Class E power amplifier has very high drain efficiency under quasi-static conditions, and is a good candidate for Envelope Elimination and Restoration (EER) or other polar techniques. Unfortunately it has an unusual carrier frequency response, for which no analytic expression was known; this …
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Vocal modulation features in the prediction of major depressive disorder severity
This thesis develops a model of vocal modulations up to 50 Hz in sustained vowels as a basis for biomarkers of neurological disease, particularly Major Depressive Disorder (MDD). Two model components contribute to amplitude modulation (AM): AM from respiratory muscles and from interaction between …
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Machine learning and autonomous system for human gait analysis based on walk speed
… and cost of care for elderly people varies dramatically between those living independently and those receiving acute or long-term care, which takes place at home, in residential care or in hospital. The common aim of national health service providers is to keep elderly people safe at their own …
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Laryngeal-Level Amplitude Modulation in Vibrato
… tract filtering is primarily responsible for the amplitude modulation (AM) present in Western classical vibrato. Using electroglottography (EGG) and the EGG speed quotient, which is sensitive to fluctuations in the amplitude of vocal fold vibration, AM was detected at the laryngeal (source) level, …
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Spectrum Awareness: Deep Learning and Isolation Forest Approaches for Open-set Identification of Signals
… Frequency Division Multiplexing (OFDM), Amplitude Modulation (AM), Frequency Modulation (FM)) or a radar waveform (Linear Frequency Modulation (LFM) or Phase-coded). However, the downside to this method is that the classifier is based on the assumption that all possible signals within the …
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Neural coding of sound envelope in reverberant environments
Speech reception depends critically on temporal modulations in the amplitude envelope of the speech signal. Reverberation encountered in everyday environments can substantially attenuate these modulations. To assess the effect of reverberation on the neural coding of amplitude envelope, we recorded …
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Coarse Radio Signal Classifier on a Hybrid FPGA/DSP/GPP Platform
… to detect, classify and extract all the parameters needed from a received signal for physical layer demodulation and configure a cognitive radio accordingly. Currently, UCS can process analog amplitude modulation (AM) and frequency modulation (FM) and digital narrow band M-PSK, M-QAM and …
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Contrast-enhanced Doppler Ultrasound Imaging using Plane Waves
… considerably increased the maximal imaging frame rate, enabling new imaging trade-off previously unavailable. In this thesis, we first implement pulse inversion Doppler using plane-wave ultrasound and demonstrate the ability of the technique in segmenting fast from slow blood flow, which has …
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A High-Q Micromachined Quatrefoil Suspension Gyroscope
… reported in this work. Gyroscopic operation in amplitude modulation (AM) is demonstrated in both the edge-anchored and the QSG gyroscope by driving one of the secondary degenerate elliptical modes while sensing the response on the other elliptical mode: for both devices, the quality factors …
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Digitální AM/FM vysílač
Táto diplomová práca je zameraná na teoretický popis aj praktickú realizáciu softwarovo definovaného vysielača. Hlavným zámerom práce bolo skonštruovať funkčný prototyp softwarovo definovaného vysielača v pásme FM. Teoretická časť je určená na popísanie základných častí zariadenia a princípov …