System and method for detecting and estimating the direction of near-stationary targets in monostatic clutter using phase information
First Claim
1. A system for detecting a target in clutter comprising:
- first means for receiving a complex return signal of an electromagnetic pulse having a real and an imaginary component;
second means for extracting from the imaginary component information representative of the phase component of the return signal; and
third means responsive to the phase component for detecting the target.
2 Assignments
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Accused Products
Abstract
A system and method for detecting a target. The inventive method includes the steps of receiving a complex return signal of an electromagnetic pulse having a real and an imaginary component; extracting from the imaginary component information representative of the phase component of the return signal; and utilizing the phase component to detect the target. Specifically, the phase components are those found from the complex range-Doppler map. More specific embodiments further include the steps of determining a power spectral density of the phase component of the return signal; performing a cross-correlation of power spectral density of the phase component of the return signal between different antenna-subarray (quadrant channels); and averaging the cross-correlated power spectral density of the low frequency components. In an alternative embodiment, the cross-correlation is performed on the phase component of the range-Doppler map directly. This signal can then be averaged to potentially provide improved detection of targets. The cross-correlations of the power spectral densities derived from the complex valued range-Doppler map are then used to detect the target in the presence of monostatic clutter. An additional teaching relates to a utilization of the phase component to ascertain a direction of the target and thereby effect target tracking as well as target detection.
20 Citations
20 Claims
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1. A system for detecting a target in clutter comprising:
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first means for receiving a complex return signal of an electromagnetic pulse having a real and an imaginary component;
second means for extracting from the imaginary component information representative of the phase component of the return signal; and
third means responsive to the phase component for detecting the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for detecting a target in clutter comprising:
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a radar receiver adapted to receive a complex return signal of an electromagnetic pulse having a real and an imaginary component;
a signal processor for extracting from the imaginary component information representative of the phase component of the return signal; and
a target detector responsive to the phase component for detecting the target.
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12. A method for detecting a target in clutter including the steps of:
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receiving a complex return signal of an electromagnetic pulse having a real and an imaginary component;
extracting from the imaginary component information representative of the phase component of the return signal; and
utilizing the phase component to detect the target. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification