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 “"Phase filter"”.
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Analysis and interpretation of compressional (P-wave) and shear (SH-wave) reflection seismic and geologic data over the Bane Dome, Giles County, Virginia
… variant shifts within the data traces. Minimum-phase filter deconvolution was also applied for the removal of reverberating energy and multiples recorded on the SH—wave lines. V<sub>p</sub>/V<sub>s</sub> ratios were used to aid in the determination of lithologies in the absence of bore-hole …
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A Compact Three-Phase Multi-stage EMI Filter with Compensated Parasitic-Component Effects
… stringent conducted emission requirements, EMI filters are adopted to attenuate the high frequency common mode (CM) and differential mode (DM) noise through the propagation path. However, self and mutual parasitic components are known to degrade the EMI filter performance. While parasitic …
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An Investigation of Performance Limitations in Active Noise Reduction Headsets
… noise reduction (ANR) headset is limited by phase lag. Speaker dynamics, control hardware, and acoustic wave propagation from the control speaker to the error microphone all contribute to this phase lag. Understanding these sources of phase lag and their relative effects on performance allows …
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An investigation of the utility of monaural sound source separation via nonnegative matrix factorization applied to acoustic echo and reverberation mitigation for hands-free telephony
… inverting a single measurement of a non- minimum phase Room Impulse Response (RIR). We describe the process by which percep- tually detrimental all-pass phase distortion arises in reverberant speech filtered by the inverse of the minimum phase component of the RIR; in short, such distortion arises …
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Design of Low Power Integrated Radios
… that digitally multiplexes the appropriate phases from an 800MHz poly-phase filter output to generate π/4 DQPSK signals at 2.4GHz using injection locking. Modulation at 1/3rd the RF frequency reduces the transmitter power consumption and enables channel selection using an integer N PLL …
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In vivo human computed optical interferometric tomography
This dissertation concerns the development of the fundamental theory, tools, and algorithms necessary to perform in vivo computed optical interferometric tomography. Computed imaging has made great advances in a wide variety of fields, greatly improving the diagnostic capability of each underlying …