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UBC Theses and Dissertations
A study of wide-band time-delayed phased-arrays with phase and frequency encoded signals for arrival-time measurement Ho, Nelson
Abstract
Phase-encoded signals are useful for arrival-time estimation after correlation. The bandwidth to carrier frequency ratio for the phase-encoded signals used in certain applications is very high. As the narrow-band assumption is violated, conventional phase-tuned phased-arrays suffer from dispersion and do not function properly for these applications. Time-delayed phased-arrays do not suffer from dispersion and function normally under the wide-band requirement. This thesis studies the time-delayed array and three types of modulated signals: linear Frequency Modulated (FM) signal, complementary Barker-coded Phase Modulated (PM) signal and Golomb-coded P M signal, for the purpose of arrival-time estimation. It is shown that the time-delay tuning for the linear F M signal is equivalent to linearly offsetting the initial frequency and adding a quadratic phase across the array. A new way of adjusting the element spacing for the time-delayed phased-array for the three types of signal to minimize off-tuning angle correlation is presented. Performance of the time-delayed phasedarray using the three types of signal are simulated and compared. Experiments have been performed to verify the practicality of the time-delayed phased-array.
Item Metadata
Title |
A study of wide-band time-delayed phased-arrays with phase and frequency encoded signals for arrival-time measurement
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1996
|
Description |
Phase-encoded signals are useful for arrival-time estimation after correlation. The bandwidth
to carrier frequency ratio for the phase-encoded signals used in certain applications is very
high. As the narrow-band assumption is violated, conventional phase-tuned phased-arrays
suffer from dispersion and do not function properly for these applications. Time-delayed
phased-arrays do not suffer from dispersion and function normally under the wide-band
requirement. This thesis studies the time-delayed array and three types of modulated signals:
linear Frequency Modulated (FM) signal, complementary Barker-coded Phase Modulated
(PM) signal and Golomb-coded P M signal, for the purpose of arrival-time estimation. It is
shown that the time-delay tuning for the linear F M signal is equivalent to linearly offsetting
the initial frequency and adding a quadratic phase across the array. A new way of adjusting
the element spacing for the time-delayed phased-array for the three types of signal to
minimize off-tuning angle correlation is presented. Performance of the time-delayed phasedarray
using the three types of signal are simulated and compared. Experiments have been
performed to verify the practicality of the time-delayed phased-array.
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Extent |
11068281 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-04-30
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0064848
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1996-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.