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 14 of 14 for “"frequency modulation FM"”.
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Spectral Matching of Musical Instrument Tones
… music: finding parameters for wavetable and frequency modulation (FM) synthesis that reproduce a particular tone. Previous FM and wavetable matching methods have used trial-and-error or computationally expensive techniques in matching sounds.
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Why do students with hearing impairment resist wearing FM amplification?
<p>The benefits of Frequency Modulation (FM) amplification usage among school-aged children is widely researched and established. The benefits provided from FM systems for students with a hearing impairment (HI) would suggest that consistent usage among these students would be high. However, …
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Generalized frequency modulation
In frequency modulation (FM) systems, a continuous-time information signal is modulated onto a sinusoidal carrier wave by using the information signal to modulate the frequency of the carrier wave. In this thesis, a more general type of modulation is developed, of which FM is a special case, that …
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On the classification of time series and cross wavelet phase variance
… to perform cross wavelet analysis (CWA), common frequency behaviour between two time series is highlighted, and the potential to extract amplitude modulated (AM) and frequency modulation (FM) characteristics in an automated way is possible. Characterisation of AM is relatively straightforward and …
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Co-channel interference rejection using a model-based demodulator
… (AMPS) and the narrowband version (NAMPS) use frequency modulation (FM) in a frequency division duplex mode. Because such systems typically use the same frequency bands in nearby cells, co-channel interference can be a significant problem. A typical digital implementation uses a quadrature …
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Spectrum Awareness: Deep Learning and Isolation Forest Approaches for Open-set Identification of Signals
… waveform (Single-Carrier (SC), Single-Carrier Frequency Division Multiple Access (SC-FDMA), Orthogonal 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 …
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Coarse Radio Signal Classifier on a Hybrid FPGA/DSP/GPP Platform
… 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 wideband signal orthogonal frequency division multiplexing …
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Efficient narrow-band speech transmission over land mobile channels.
… instead of the 20-30kHz currently used in analog frequency modulation (FM).Three main subsystems, required by theconcept, are proposed. A novel differential dynamic speech companding system improves the signal to noise ratio of the low volume syllables, and, therefore, improves the speech quality. …
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Generalized Passive Radar Processing Chain For Use With Different Signals of Opportunity
… is used as the illuminator for the PR such as Frequency Modulation (FM) radio. The exact performance of a PR depends on both the physical geometry of the transmitter and receiver combination as well as the signal properties of the IoO. By using multiple different IoO's concurrently, transmitter …
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The ecstatic display call of the Adélie penguin (Pygoscelis adeliae)
… found heavier males had significantly lower Frequency Modulation (FM) in the short repeated syllables of their calls than lighter males. Furthermore, a male’s breeding success could be predicted during the early breeding season by the FM. Logistic regression models showed that early male …
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Doppler-only target tracking for a multistatic radar exploiting FM band illuminators of opportunity
… thesis is to evaluate the feasibility of using a Frequency Modulation (FM) Broadcast band CR system as a cost effective solution for Air Traffic Control (ATC). An inherent complication by exploiting FM is the low range resolution due to the low bandwidth of FM radio signals. However, due to …
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A High-Q Micromachined Quatrefoil Suspension Gyroscope
… to fabrication tolerances, achieving low frequency split between the secondary degenerate modes. The average frequency split between the modes of 17 devices, as fabricated, is 5.8 Hz (13.8 ppm). Such a low frequency split facilitates the implementation of mode-matching during the operation …
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A spin on compressive sensing imaging : reticle-based single-pixel imaging system
… modulated the incoming light in amplitude of frequency to track a target. The use of spinning frequency modulation (FM) reticles as imaging devices was analyzed to determine the capability of such a system in general imaging scenarios. It was found that the frequency versus angle and radius …
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Digitální AM/FM vysílač
… softwarovo definovaného vysielača v pásme FM. Teoretická časť je určená na popísanie základných častí zariadenia a princípov činnosti na pochopenie základného princípu digitálnych vysielačov a definovanie vhodnej súčiastkovej základne pre stavbu. Rozobraté sú používané typy A/D a D/A …