[특허]Passive ranging of a target

BAE Systems Information and Electronic Systems Integration Inc.

Passive ranging of a target

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-013/42 G01S-007/292 G01S-011/02 G01S-005/02 G01S-007/295 G01S-019/42
출원번호	US-0760660 (2013-02-06)
등록번호	US-9341705 (2016-05-17)
발명자 / 주소	Yannone, Ronald M.
출원인 / 주소	BAE Systems Information and Electronic Systems Integration Inc.
대리인 / 주소	Santarelli, Bryan A.
인용정보	피인용 횟수 : 0 인용 특허 : 34

초록 ▼

In an embodiment, an apparatus includes a detector and a range finder. The detector is configured to determine a direction to a target in response to a signal received from the target, and the range finder is configured to determine a range to the target in response to the direction and independently of an amplitude of the signal. For example, such an apparatus (e.g., a computer-based apparatus) may be disposed on tactical fighter aircraft, and may be able to range (e.g., azimuth range or slant range) a target passively even if an accurate measure of the amplitude of the signal received from the target is unavailable.

대표청구항 ▼

1. An apparatus, comprising: a detector configured to determine a direction to a target in response to a signal received from the target; anda range finder configured to determine a range to the target in response to the direction and independently of an amplitude of the signal;wherein the range finder is configured to determine the range to the target by:tracking the target according to a first algorithm;tracking the target according to a second algorithm;weighting results of the first and second algorithms; anddetermining the range to the target in response to the weighted results of the first and second algorithms. 2. The apparatus of claim 1 wherein the direction includes an azimuth angle. 3. The apparatus of claim 1 wherein the direction includes an elevation angle. 4. The apparatus of claim 1 wherein the detector is configured to determine a direction to a moving target in response to a signal received from the moving target. 5. The apparatus of claim 1 wherein the detector is configured to determine a direction to an approximately stationary target in response to a signal received from an approximately stationary target. 6. The apparatus of claim 1 wherein the detector is configured to determine a direction to a target in response to a signal emitted from the target. 7. The apparatus of claim 1 wherein the detector includes an electronic warfare system. 8. The apparatus of claim 1 wherein the first algorithm is configured to model a path of the target as being an approximately straight line; andthe second algorithm is configured to model the path of the target as being a curved line. 9. The apparatus of claim 1 wherein the first algorithm is configured to model the target as moving at an approximately constant velocity; andthe second algorithm is configured to model the target as moving at a changing velocity. 10. The apparatus of claim 1 wherein the range finder includes: a first stage configured to determine a coarse range to the target; anda second stage configured to determine a fine range to the target in response to the coarse range. 11. The apparatus of claim 1 wherein the first algorithm is configured to model the target as not moving. 12. The apparatus of claim 1 wherein the range finder includes at least one Kalman filter. 13. The apparatus of claim 1 wherein the range finder includes at least one Kalman filter with all velocity component states having values fixed at zero. 14. The apparatus of claim 13 wherein the range finder is configured to prompt an operator of the object to move the object in a manner that increases a speed at which the range finder can determine the range. 15. An apparatus, comprising: a detector configured to determine a direction to a target in response to a signal received from the target; anda range finder configured to determine a range to the target in response to the direction and independently of an amplitude of the signal;wherein the range finder includes: a first Kalman filter configured to determine a first value of the range to the target; and a second Kalman filter configured to receive a seed parameter from the first Kalman filter, and to determine a second value of the range to the target in response to the seed parameter. 16. An apparatus comprising: a detector configured to determine a direction to a target in response to a signal received from the target; and a range finder configured to determine a range to the target in response to the direction and independently of an amplitude of the signal;wherein the range finder includes:a first Kalman filter configured to determine a first value of the range to the target; anda second Kalman filter configured to receive seed values for filter coefficients and filter variables from the first Kalman filter, and to determine a second value of the range to the target in response to the seed values. 17. A tangible computer readable medium storing instructions that, when executed by a computing apparatus, cause the computing apparatus to perform, or cause the computing apparatus to cause another apparatus to perform, the following steps: determining a direction to a target in response to a signal received from the target; and determining a range to the target in response to only the direction; wherein the range to the target is determined by:tracking the target according to a first algorithm;tracking the target according to a second algorithm;weighting results of the first and second algorithms; anddetermining the range to the target in response to the weighted results of the first and second algorithms.

이 특허에 인용된 특허 (34)

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Ameen Yashwant K. ; Ryan Patrick Anthony, Method and apparatus for calibrating azimuth boresight in a radar system.
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Brown Mark W. (Pasadena MD), Method and apparatus for determining the angle of arrival of a radar signal at a spinning interferometer.
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Yannone,Ronald M.; Mun,Kam U., Passive RF, single fighter aircraft multifunction aperture sensor, air to air geolocation.
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Tsui James B. Y., Passive ranging using global positioning system.
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Yannone, Ronald M., Quantity smoother.
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McGraw,Gary A.; Frank,Robert J.; Peterson,Kenneth M.; Haendel,Richard S.; Zogg,Scott J. F., Relative navigation for precision rendezvous and station keeping using datalink signals.
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Seif Joel F. (New Hartford NY) Nunno Christopher G. (Utica NY), Target passive ranging without an ownship maneuver.
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