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 12 of 12 for “"phase correction"”.
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High Resolution Acetic Acid Survey and Water Vapor Radiometer
… are severely affected by atmospheric conditions. Phase correction is a technique to obtain high quality data and achieve great scientific goals. For our acetic acid survey, a better phase correction technique can not only detect weaker transitions of large molecules, but also increase the map …
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Implementation of Range Autofocus for SAR Radar Imaging
… an autofocus technique used to correct for phase error due to non-linearities in the components of a FMCW radar. Also described here is the algorithm used in calculating the phase error and application of the phase correction with triangle modulation. Known errors were calculated at certain …
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Improving Seismic-to-well Ties
… wavelet evolves with amplitude decay and minimum-phase dispersion. Stationary deconvolution estimates and eliminates a single wavelet from the nonstationary trace, resulting in large nonstationary amplitude and phase errors. Gabor deconvolution accurately estimates and eliminates the amplitude …
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Background Noise Reduction in Wind Tunnels using Adaptive Noise Cancellation and Cepstral Echo Removal Techniques for Microphone Array Applications
… was achieved in recovering both magnitude and phase of the direct signal. Experimental data resulted in Cepstral features that caused errors in phase accuracy. A simple phase correction procedure was proposed for this data, but in general it appears that the Cepstral technique is and would be …
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Hearing the Moment: Measures and Models of the Perceptual Centre
… evaluated alongside a new method based on the phase correction response (PCR) in a synchronized tapping task. Rhythm adjustment and the PCR method yielded consistent P-centre estimates and showed no evidence of P-centre context dependence. Moreover, the PCR method appears most time efficient …
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Implementing IS-95, the CDMA standard, on TMS320C6201 DSP
… link system: PN Descrambling, Walsh Despreading, Phase Correction & Maximal Ratio Combining, Deinterleaver, Digital Automatic Gain Control, and Viterbi Decoder. The entire demodulation process is done completely in C. That makes it a very attractive alternative implementation in the future …
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Limitations and Improvement of Subcarrier Multiplexed Systems over Optical Fiber
… optical local oscillator. By controlling the phases of the local oscillator and the local subcarrier oscillator independently in the homodyne detection scheme, both the phase error and power fading of the detected subcarrier channel can be eliminated. This technique also allows the subcarrier …
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An investigation of electrochemical techniques in acoustic environments
… the spatial variation of the HMV signal, phase correction and time averaged current with respect to the jet orifice is presented. The detection limit for the analysing system is shown to be 45 × 10-9 mol dm-3.<br/>The HMV method is employed to study the reduction of molecular oxygen at …
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Implementation of Hadamard Encoding and Reconstruction of MEGA-Edited Spectroscopy (HERMES) for quantification of ɣ-aminobutyric acid (GABA) and glutathione (GSH)
… scripts in MATLAB. Following frequency and phase correction of individual averages with GANNET, we applied our custom simultaneous linear combination model that iteratively fit the concatenated sum and difference spectra using a least squares routine. SPM was used for tissue segmentation of …
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Acceleration of Subtractive Non-contrast-enhanced Magnetic Resonance Angiography
… reconstructed images. In Chapter 4, an intensity correction method is proposed to improve background suppression for subtractive NCE-MRA techniques. Residual signals of background tissues are removed by performing a weighted subtraction, in which the weighting factor is obtained by a robust …
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Investigación sobre acondicionamiento ambiental y sostenibilidad en las prospecciones petrolíferas
… factors, determination of effects and correction factors deduction. 3. Environmental audit. - To establish the fundamental points of the evaluation of environmental impact. 4. Experimental phase. - Correction factors research, obtaining conclusions on the effects, environmental factors, …