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Document Title |
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7629920 |
Entropy method for range alignment for integration of target returns
The proper timing or alignment for coherent or noncoherent integration of radar pulses returned from a potentially moving target is determined by determining the entropy associated with sets of...
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7567202 |
Radar system
Embodiments of the invention are concerned with a radar system, and relates specifically to scanning radar systems that are suitable for detecting and monitoring ground-based targets. In one...
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7535410 |
Weight calculation method, weight calculation device, adaptive array antenna, and radar device
A weight calculation method begins by storing a target reflection signal of a radar pulse received via an antenna in cells corresponding to positions along with a reception timing for a plurality...
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7522095 |
Polygonal cylinder array antenna
A polygonal cylindrically shaped phased array antenna forming a radar has an active aperture that focuses in any of one or more angular azimuth directions without inertia. It further includes...
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7522089 |
Airborne look-down doppler radar tracking of hovering helicopters using rotor features
A system and method is presented for detecting and classifying slow-moving and hovering helicopters from a missile's look-down Doppler radar that is compatible with the existing base of Doppler...
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7509217 |
Vehicle detector and vehicle detecting method
A vehicle detector includes a detecting apparatus and a determining apparatus. If a plurality of detection points detected by the detecting apparatus forms a group of detection points, the...
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7498968 |
Synthetic aperture design for increased SAR image rate
High resolution SAR images of a target scene at near video rates can be produced by using overlapped, but nevertheless, full-size synthetic apertures. The SAR images, which respectively correspond...
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7486229 |
Test method used for assessing target detection accuracy of ground moving target indicator data
The Ground Moving Target Indicator (GMTI) target detection accuracy test system receives, compares and analyzes GMTI test data that is formatted according to the NATO-EX (v.2.01) Standard. The GMTI...
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7456780 |
Method and system for developing and using an image reconstruction algorithm for detecting and imaging moving targets
Image reconstruction approaches that use standard Cartesian-sampled, frequency-domain SAR data, which can be collected by a platform with a single radar antenna, together with its associated...
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7450057 |
Signal processing for accelerating moving targets
A method for performing signal processing for accelerating moving targets, in one implementation, encompasses a method for performing coherent integration of pulses within a CPI for SMTI radar. In...
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7375676 |
Mutual interference processor for pulse radar
Pulsed or mutual interference in a pulse radar system is ameliorated by a process that includes a pulse-Doppler filter, some frequency bins of which correlate with clutter. Pulsed interference is...
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7369083 |
Method for performing bistatic radar functions
A bistatic radar system having a transmitter that generates unique signals at spatially independent transmitter degrees of freedom and a receiver that filters the signal at each receiver degree of...
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7333049 |
Waveform ambiguity optimization for bistatic radar operation
A radar transmitter is at a first location on a moving platform and illuminates a target with a sequence of frequency modulated radar pulses. The frequency modulated pulses are linear frequency...
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7327305 |
Process for the evaluation of signals in an SAR/MTI pulsed radar system
The invention relates to a process for the evaluating a received signal of an SAR/MTI pulsed radar system that transmits SAR and MTI pulses with respective definable pulse repetition frequency...
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7307575 |
Through-the-wall frequency stepped imaging system utilizing near field multiple antenna positions, clutter rejection and corrections for frequency dependent wall effects
Lower resolution and clutter-prone two-tone CW radars can have the displayed images dramatically improved by three techniques involved in the subject invention. The three techniques involved are...
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7304603 |
Radar apparatus and processing method for detecting human carried explosive devices
A linear FM pulse radar with Doppler processing of co-polarized and cross-polarized radar return signals isolates the target echo signal content associated with a moving pedestrian to provide high...
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7298316 |
Apparatus and method for instantly automatic detecting clutter blocks and interference source and for dynamically establishing clutter map
An apparatus for detecting clutter blocks and an interference source for dynamically establishing a clutter map includes a clutter block detecting module accumulates a plurality of range cell data...
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7259714 |
Unique space time adaptive system (USS)
A method of detecting radar returns and measuring their parameters with or without clutter present and no clutter cancellation employed which includes transmitting at least one pulse; processing...
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7167127 |
Process for tracking vehicles
The invention is process for tracking a moving targeted vehicle from a remote sensor platform comprising the steps of 1) tracking the targeted vehicle and periodically recording its radar signature...
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7154434 |
Anti-personnel airborne radar application
An anti-personnel airborne radar application for ultra slow target tracking is provided. The anti-personnel airborne radar application includes a rotorcraft and a signal processing system. The...
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7154433 |
Method and device for the detection and track of targets in high clutter
A method for discriminating and tracking a target in a clutter cloud includes transmitting a radar signal at a signal bandwidth to: identify a range extent of a clutter cloud; determine a centroid...
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7109911 |
Dual synthetic aperture radar system
The dual synthetic aperture array system processes returns from the receiving arrays. The two identical receiving arrays employing displaced phase center antenna techniques subtract the...
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7095358 |
Technique for cancellation of elevated clutter for the detection of fixed and ground moving targets under trees
A target is detected under a forest canopy or other elevated clutter where the target is obscured by the elevated clutter. Radar returns reflected from the target on the surface, combined with...
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7081849 |
Process for sensor resources management
The subject process accepts the data from a kinematic tracker and maps them to fuzzy set conditions. Then using a multitude of defined membership functions and fuzzy logic gates, generates sensor...
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7071867 |
Method, apparatus, and computer program product for radar detection of moving target
Methods, apparatus, and computer program products are provided for tracking at least one moving target with a radar device without requiring the use of Doppler information. The invention comprises...
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7064704 |
Apparatus for radar
A radar transmits electromagnetic energy in pulse repetition intervals and receives reflections from objects in range gates including Doppler filters. The radar approves desirable ambiguous echoes...
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7046188 |
System and method for tracking beam-aspect targets with combined Kalman and particle filters
Systems and methods of tracking a beam-aspect target are provided. In embodiments, a target is tracked with a Kalman filter while detections are received. After a detection is missed, the Kalman...
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7038618 |
Method and apparatus for performing bistatic radar functions
A bistatic radar system having a transmitter that generates unique signals at spatially independent transmitter degrees of freedom and a receiver that filters the signal at each receiver degree of...
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7038617 |
Sensor doppler/wavelet processing
A method according to an aspect of the invention is for filtering coherent multipulse radar, sonar or lidar returns. The method comprises the steps of separating the returns into mutually...
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6982668 |
Tangential velocity measurement using interferometric MTI radar
Radar systems use time delay measurements between a transmitted signal and its echo to calculate range to a target. Ranges that change with time cause a Doppler offset in phase and frequency of the...
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6937185 |
Rain versus target discrimination for doppler radars
A method of removing returns from rain in Doppler radar systems (and corresponding apparatus and computer software) comprising receiving a Doppler radar return signal, transforming the signal into...
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6927726 |
Radar
A radar suppresses a dc component so as to improve the precision in processing a signal that belongs to a low-frequency band. The radar comprises a mixer that mixes a transmitted signal and a...
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6870502 |
Advanced asynchronous pulse detector
An asynchronous pulse detector including a data estimator which estimates the return signal based on the corrected return signal, a detector for detecting an asynchronous pulse in the return...
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6867732 |
Embedded multi-functional preprocessing input data buffer in radar system
An embedded multi-functional preprocessing input data buffer comprises a clutter lock loop circuit, a multiplier, a mode selective multiplexer, a dual-port memory, an input multiplexer,...
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6833808 |
Signal processing
A method and apparatus for processing of a signal in which a variation in phase between a transmitted and reflected pulse is modeled, as is the amplitude of the pulse. The modeled phase and...
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6816109 |
Method for automatic association of moving target indications from entities traveling along known route
A method for automatic association of moving target indications from at least one entity traveling along a route. A moving target indicator radar is used to detect a plurality of moving target...
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6809682 |
Method and device for the detection and track of targets in high clutter
A method for discriminating and tracking a target in a clutter cloud includes transmitting a radar signal at a signal bandwidth to: identify a range extent of a clutter cloud; determine a centroid...
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6765526 |
GMTI motion compensation
Movement of a GMTI radar during a coherent processing interval over which a set of radar pulses are processed may cause defocusing of a range-Doppler map in the video signal. This problem may be...
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6765525 |
Method for reducing false alarm rate in radar images
A method for reducing the false alarm rate, i.e. the number of alarms of fixed targets erroneously declared as moving targets in the radar images of two- or multi-channel MTI radar devices, wherein...
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6756935 |
Full polarization ground moving target indicator radar automatic target detection algorithm
A method, apparatus, and system for automatic detection of targets from radar data are disclosed. Ground moving target indicator radar is used to collect radar data which is then filtered to...
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6747593 |
Generalized clutter tuning for bistatic radar systems
A system and method for controlling clutter Doppler spread in a bistatic radar system is developed resulting in enhanced detection of low-Doppler targets or improved SAR mode performance. In an...
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6697010 |
System and method for moving target detection
The present invention is a system and method for radar detection of moving targets. The radar system of the present invention has only a single transmit phase center and a single receive phase...
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6691947 |
Repetitive image targeting system
The present invention includes a system and method for accurately locating moving targets. The system includes a targeting aircraft that has a radar system with a simultaneous SAR radar/moving...
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6690318 |
Cellular radar
A cellular radar system is disclosed for detecting and tracking objects in a surveillance area that is divided into cells. Each cell is scanned by at least two radars to produce two (or more)...
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6686874 |
Process for calibrating radar signals at subapertures of an antenna of two-channel SAR/MTI radar system
In a process for computing the radar signals present at the output of two subapertures of an antenna of a two-channel radar system, the two subaperture channels are combined by means of a wave...
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6650273 |
Change subtraction of synthetic aperture radar data
A method ( 100 ) for coherent change subtraction of mission and reference synthetic aperture radar (SAR) data ( 20′,20 ″) is provided. The method ( 100 ) forms ( 102 ) mission and reference...
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6633253 |
Dual synthetic aperture radar system
The dual synthetic aperture array system processes returns from the receiving arrays. The two identical receiving arrays employing displaced phase center antenna techniques subtract the...
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6614386 |
Bistatic radar system using transmitters in mid-earth orbit
A bistatic radar system and method. In the illustrative embodiment, a receiver is positioned in a horizontal plane. A transmitter is then positioned in Middle Earth Orbit at a position that is...
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6611226 |
Satellite surveillance system and method
A radar surveillance system includes a plurality of satellites a plurality of medium earth orbit satellites to provide continuous, long dwell coverage of a region of interest. Each satellite has an...
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6538597 |
Radar system having spoofer, blanker and canceler
A radar system including a blanker and a sidelobe canceler is described including an open loop nulling circuit for introducing one or more nulls in the main beam and a blanker beam. With this...
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