Enhanced system and method for detecting the leading edge of a waveform
First Claim
1. A method for detecting the leading edge of an ultra wideband waveform, comprising:
- locking to the ultra wideband waveform at a lock reference time with a receiver;
sampling the ultra wideband waveform with the receiver during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion, wherein said ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest; and
calculating a sampling envelope according to an envelope equation.
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Abstract
The present invention is an improved system and method for detecting the leading edge of a waveform. More specifically, the invention relates to detecting the leading edge of an ultra wideband waveform. The invention requires locking to the ultra wideband waveform at a lock reference time, and sampling the ultra wideband waveform during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion. The ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest to minimize the number of samples for leading edge detection processing.
14 Citations
19 Claims
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1. A method for detecting the leading edge of an ultra wideband waveform, comprising:
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locking to the ultra wideband waveform at a lock reference time with a receiver; sampling the ultra wideband waveform with the receiver during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion, wherein said ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest; and calculating a sampling envelope according to an envelope equation. - View Dependent Claims (2, 3, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18, 19)
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4. A method for detecting the leading edge of an ultra wideband waveform, comprising:
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locking to the ultra wideband waveform at a lock reference time with a receiver; and sampling the ultra wideband waveform with the receiver during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion, wherein said ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest, wherein the one or more detection criterion are based on noise information derived during an ultra wideband signal acquisition period that results in locking to the ultra wideband signal. - View Dependent Claims (5)
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14. A method for detecting the leading edge of an ultra wideband waveform, comprising:
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locking to the ultra wideband waveform at a lock reference time with a receiver; and sampling the ultra wideband waveform with the receiver during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion, wherein said ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest; wherein the ultra wideband waveform is sampled during one or more initial time windows relative to the lock reference time to establish a detection criteria to identify one or more leading edge candidate times; wherein the ultra wideband waveform is sampled during one or more scan time windows preceding at least one of the one or more initial time windows based on a second detection criteria to identify one or more leading edge candidate times. - View Dependent Claims (15)
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Specification