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 9 of 9 for “"frequency coding"”.
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Design, Analysis And Implementation Of Orthogonal Frequency Coding In Saw Devices Used For Spread Spectrum Tags And Sensors
… systems can typically use a single carrier frequency and a simple device embodiment, since tagging is not required. In a multi-sensor environment, it is necessary to both identify the sensor and retrieve the sensed information. This dissertation presents the concept of orthogonal frequency …
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Design of sparse signaling schemes in fading wideband channels
… shift to the wideband regime due to the crowded frequency spectrum has resulted in a requirement for a different modulation scheme from previously used modulation schemes in order to succeed. Impulsive frequency shift keying, which is frequency shift keying with a duty cycle, is one such …
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Ultra-wideband Spread Spectrum Communications using Software Defined Radio and Surface Acoustic Wave Correlators
… wave (SAW) correlator receiver with orthogonal frequency coding and software defined radio (SDR) base station transmitter. Orthogonal frequency coding (OFC) and pseudorandom noise (PN) coding provide a means for spreading of the UWB data. The use of orthogonal frequency coding (OFC) increases …
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Tracing Ainu and Pre-Ainu Cultural Continuity Through Cladistic Analysis of Faunal Assemblages
… in Central Hokkaido, Japan using Generalized Frequency Coding methods (Smith & Gutberlet 2001). Associations of site components follow geographic rather than temporal trends, showing similarities in animal use across these time periods but differentiated between coastal lowland, inland …
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Resolving Measurement Errors Inherent with Time-of-Flight Range Imaging Cameras
… methods for resolving multi-path interference: coding in time, coding in frequency, and coding in space. Time coding is implemented by replacing the single frequency amplitude modulation with a binary sequence. Fundamental to ToF range cameras is the cross-correlation between the reflected light …
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Multiple frequency atmospheric radar techniques
This thesis is concerned with the use of multiple frequency coding to improve the vertical resolution of pulsed-Doppler very high frequency (VHF) atmospheric radars, especially with regards to the two-frequency technique known as frequency domain interferometry (FDI). This technique consists of …
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Invasive and Noninvasive Brain Stimulation Strategies for the Treatment of Tinnitus
… system also play a vital role in shaping neural coding along the auditory pathway. The work in this thesis seeks to investigate the organization and role of these modulatory pathways of the central auditory system, particularly to devise and improve upon existing neuromodulation strategies for …
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EXAMINING THE CONTRIBUTION OF GENETIC VARIANTS TO CARDIOMETABOLIC TRAITS
… project was to determine whether rare or low frequency coding variants play a meaningful and detectable role in cardiometabolic traits. These projects utilized the Insulin Resistance Atherosclerosis Family Study (IRASFS), a well phenotyped cohort of large Hispanic- and African-American …
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Pitch, loudness and frequency selectivity in low-frequency hearing loss
… and cochlear hydrops show fluctuating low-frequency hearing loss (FLFHL). At present these changes are followed as patients' subjective reports and occasional measurements. Consecutive long-term measurements should provide more comprehensive information on the hearing fluctuations than the …