Highway Speed Ground Penetrating Radar System Utilizing Air-Launched Antenna and Method of Use
First Claim
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1. A ground penetrating radar system comprising:
- an air-launched transmitter and receiver;
an inline analog interference rejection filter;
an analog to digital converter;
a delay-tap filter;
a measurement system for determining the composition of a heterogeneous material.
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Abstract
Embodiments of the disclosed technology comprise an air-launched antenna system with interference-rejection technology that operates in analog hardware as well as by way of a digital filtering technique. Using an inline analog hardware filter combined with a digital filter, to determine transversal (and/or recursive) coefficients, in a calibration phase, a measurement system may be configured to remove interference and the effects (such as a delay or temperature variation) which result from use of an analog filter. In this manner, the resulting measurements of a composition of road surface are more accurate and useful.
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Citations
21 Claims
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1. A ground penetrating radar system comprising:
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an air-launched transmitter and receiver; an inline analog interference rejection filter; an analog to digital converter; a delay-tap filter; a measurement system for determining the composition of a heterogeneous material. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for calibrating a ground penetrating radar system comprising:
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using an air-launched transceiver to reflect an ultra-wide band signal off a homogeneous material; using an inline analog rejection filter to block a selection of frequencies in a reflected said signal based on anticipated interference from external signals; shaping said reflected signal with a digital filter to at least partially restore said ultra-wide band signal; and using transversal coefficients determined in said prior step of shaping to shape a reflection of an ultra-wide band signal off a heterogeneous material. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A ground penetrating radar measurement device comprising:
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means for transmitting and receiving a radio signal; analog filtering means; digital filtering means; means for determining transversal co-efficients associated with said digital filter to at least partially restore said transmitted radio signal; means for measuring a composition of a heterogeneous material. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification