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7623063 |
System for simultaneously transmitting multiple signals through each element of a radar array
In conventional phased array antennas, multiple signals that perform different functions, such as radar, electronic warfare (EW) and telecommunications, can each be simultaneously transmitted only...
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7598900 |
Multi-spot inverse synthetic aperture radar imaging
Providing multi-spot inverse synthetic aperture radar (ISAR) imagery is disclosed. Embodiments of techniques in accordance with the present disclosure may advantageously improve multiple target...
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7598899 |
Method and apparatus for compression of SAR images
A computer system for compressing synthetic aperture radar (SAR) images includes a database for storing SAR images to be compressed, and a processor for compressing a SAR image from the database....
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7589662 |
Synthetic aperture radar systems and methods
A method of determining a radar receiver path, comprising the steps of: obtaining a transmitter position; obtaining a target position and velocity; obtaining a radar receiver position and velocity;...
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7586434 |
Method and system for mapping a target scene using scanning radar
A system and method for mapping a target scene by means of scanning radar utilizing the Doppler effect that arises in the event of movement between radar and target scene, where the movement of a...
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7551119 |
Flight path-driven mitigation of wavefront curvature effects in SAR images
A wavefront curvature effect associated with a complex image produced by a synthetic aperture radar (SAR) can be mitigated based on which of a plurality of possible flight paths is taken by the SAR...
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7551118 |
RFI suppression in SAR
A filter scheme for broadcast interference cancellation that is computationally efficient and numerically robust Airborne Low Frequency Synthetic Aperture Radar (SAR) operating in the VHF and UHF...
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7545307 |
Target recognition system and method with unknown target rejection
The present invention describes a new QR enclosing voting scheme that allows the extraction of base signatures of objects using a shortest path QR algorithm, providing a probability distribution...
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7538712 |
Method and apparatus for decompression of SAR images
A computer system for decompressing synthetic aperture radar (SAR) images includes a database for storing SAR images to be decompressed, and a processor for decompressing a SAR image from the...
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7537181 |
Guidance system
There is provided a guidance system for allowing an air vehicle to guide a moving object, comprising a Synthetic Aperture Radar located on the air vehicle, and a means of communication for allowing...
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7535412 |
Single pulse imaging radar system and method
A single pulse imaging (SPI) radar system for creating a radar image from a plurality of Doppler phase-shifted return radar signals in a radar environment of moving targets includes a transmitter;...
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7532150 |
Restoration of signal to noise and spatial aperture in squint angles range migration algorithm for SAR
A moving radar generates a search mode synthetic aperture image of a patch having a principal scatterer. The boundaries of the patch are from R 0 to R 1 slant range and θ 0 to θ 1 azimuth...
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7528762 |
Signal processing methods for ground penetrating radar from elevated platforms
Methods and systems for using ground penetrating radar (GPR) to obtain subsurface images. The depression angle, frequency, and polarization can all be adjusted for the soil conditions at hand. In...
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7518543 |
Method for determining positions of targets by bistatic measurements using signals scattered by the targets
A method for determining the positions of targets by bistatic measurements using signals scattered by the targets is provided in which the velocities of the targets can also be determined. The...
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7515098 |
Method for developing and using an image reconstruction algorithm for multipath scattering
Described herein is an implementation of the IRAMS processing based upon a multi-delay-resolution framework applied to SAR image data measured at different aspect angles. The power of this new...
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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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7504985 |
Multi-dimensional real-array radar antennas and systems steered and focused using fast fourier transforms
Radar systems are disclosed that include a signal generator, an antenna, a switching circuit, an I/Q sampling and signal-demodulation (demodulation) processor, and a FFT processor. The signal...
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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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7496157 |
Apparatus for detecting a distance and apparatus for detecting a body
In an apparatus for detecting a distance and improving the SN ratio of received signals, an angular frequency (ω 1 ) of sinusoidal wave signals generated by a sinusoidal wave generator is brought...
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7474249 |
Systems and methods for dedicating power to a radar module
Systems and methods presented herein are generally directed to providing power to a radio frequency module of a radar antenna. For example, a system comprises a dedicated power cell that supplies a...
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7420504 |
Method of operating a multibeam radar
A method of operating a multibeam radar carried on a platform flying a mission over a prescribed flight path to obtain images of a plurality of target areas, the beams of said radar being the...
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7411540 |
Synthetic aperture radar (SAR) data compression
A method of compressing phase history (PH) data includes (a) dividing PH data into multiple sub-apertures; (b) transforming the sub-apertures into multiple coarse resolution images; and (c)...
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7397418 |
SAR image formation with azimuth interpolation after azimuth transform
Two-dimensional SAR data can be processed into a rectangular grid format by subjecting the SAR data to a Fourier transform operation, and thereafter to a corresponding interpolation operation....
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7391358 |
Weather radar echo tops forecast generation
Described are a method and a system for generating a short-term forecast of echo tops as defined by weather radar measurements. The method includes receiving echo tops images for different times....
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7391357 |
Correction of motion measurement errors beyond the range resolution of a synthetic aperture radar
Motion measurement errors that extend beyond the range resolution of a synthetic aperture radar (SAR) can be corrected by effectively decreasing the range resolution of the SAR in order to permit...
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7385553 |
Process for mapping multiple-bounce ghosting artifacts from radar imaging data
Described herein are frequency-domain back-projection processes for forming spotlight synthetic aperture radar (“SAR”) images that are not corrupted by the effects of multiple-bounce ghosting...
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7372393 |
Method and system for determining unwrapped phases from noisy two-dimensional wrapped-phase images
A method converts an input image of noisy wrapped phases to an output image of absolute unwrapped phases. The noisy wrapped phases in the input image are represented as a set of re-wrapped phases...
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7348917 |
Synthetic multi-aperture radar technology
Systems and methods of improving synthetic aperture radar (SAR) system are disclosed. In particular, an example system includes a radar signal radiator configured to transmit radar signal pulses...
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7324042 |
Monostatic radar beam optimization
A method and system for optimizing transmit beam and receive beam antenna radiation patterns. The method includes inputting initial estimate of beam weights for a transmit beam and a receive beam...
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7301495 |
Interrupt SAR implementation for range migration (RMA) processing
A moving radar ( 405 ) generates a synthetic aperture image from an incomplete sequence of periodic pulse returns. The incomplete sequence of periodic pulse returns has one or more missing pulses....
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7289060 |
Super high range resolution amplitude and range principal scatterer (SHARP) classifier
A radar classifies an unknown target illuminated with a large bandwidth pulse. The large bandwidth pulse may be algorithmically synthesized. The target reflects the large bandwidth pulse to form a...
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7277042 |
Compensation of flight path deviation for spotlight SAR
A radar acquires a formed SAR image of radar scatterers in an area around a central reference point (CRP). Target(s) are within the area illuminated by the radar. The area covers terrain having a...
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7245250 |
Synthetic aperture radar image compression
A method is disclosed of generating multi-resolution images using synthetic aperture radar (SAR) phase history data. A high resolution SAR image may be formed from the phase history data, or a...
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7239263 |
Platform shake compensation method in synthetic aperture processing system
The present information comprises the stages of: applying frequency analysis to positional information on a platform, generating virtual positional information on the platform based on a frequency...
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7236125 |
Method for reducing angular blur in radar pictures
A method for reducing angular blur in radar pictures achieved in range bin based detection systems includes measuring a variable S(x, y) such as amplitude or power as a function of an angle x and a...
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7218268 |
Self-calibrating interferometric synthetic aperture radar altimeter
A synthetic aperture radar system uses RF bandwidth and Doppler beam sharpening principles to develop fine altitude and along-track resolutions. To achieve accurate cross-track position...
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7212149 |
System, method and computer program product for detecting and tracking a moving ground target having a single phase center antenna
A synthetic aperture radar (SAR) system having a single phase center antenna is provided, the SAR system including a measurement unit and a tracker unit. The measurement unit is capable of...
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7196653 |
Imaging apparatus and method
An imaging apparatus has transmitter illuminating a selected surface with a radar beam footprint, and processor for profiling/processing the radar returns so as to derive attitude information in...
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7183965 |
Efficient stripmap SAR processing for the implementation of autofocus and missing pulse restoration
A moving radar generates a search mode synthetic aperture image of a patch from a sequence of periodic pulse returns having one or more missing pulses. An azimuth and range interpolation generates...
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7183963 |
System and method for inspecting transportable items using microwave imaging
An inspection system uses microwave radiation to capture a microwave image of a transportable item. The system includes a transmit scanning panel including a transmit array of transmit antenna...
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7158071 |
Radar rainfall estimation technique when attenuation is negligible
A method of using a bipolar radar to estimate a precipitation rate for rain that generates negligible attenuation. The method includes using the bipolar radar to measure the differential phase Φ...
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7151476 |
Radar system having a beamless emission signature
A radar system having a beamless emission signature is described. In one implementation, the radar system includes a transmission system and a receiver system. The transmission system is configured...
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7145498 |
Efficient autofocus method for swath SAR
A moving radar generates a search mode synthetic aperture image of a patch from periodic pulse returns reflected from the patch. The patch is imaged from radar returns derived from two or more...
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7145496 |
Autofocus method based on successive parameter adjustments for contrast optimization
A radar on a moving platform generates an initial synthetic aperture (SAR) image of a scene from a sequence of periodic pulse returns approximately motion compensated. The SAR image is formed from...
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7142149 |
Mensuration for the conformal range migration algorithm
A radar system is mounted on a moving platform moving along a great circle. The radar comprises a radar receiver for digitizing radar returns having a phase from a scatterer (target) in a scene. A...
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7119732 |
Bistatic and multistatic system for space situational awareness
Provided is a bistatic and multistatic system for detecting and identifying a target in close proximity to an orbiting satellite. An electromagnetic fence is established to surround the satellite,...
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7116265 |
Recognition algorithm for the unknown target rejection based on shape statistics obtained from orthogonal distance function
A method for classification of a target object having a periphery comprises the steps of: selecting a plurality of random first chords D 1 across the periphery of the target object;
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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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7106250 |
Robust predictive deconvolution system and method
A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal;...
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7106243 |
Technique for enhanced quality high resolution 2D imaging of ground moving targets
A radar receiver on a moving platform images a moving target and non-moving clutter using a single SAR array. The radar receiver converts the radar returns into digital radar returns and motion...
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