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8094059 |
Method for determining the angular aperture corresponding to the extent in a plane of an object seen by a radar antenna
The present invention relates to a method for determining the angular aperture corresponding to the extent in a plane of an object seen by a radar antenna, the object being situated at a given...
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8049660 |
Radar apparatus configured to suppress effects of grating lobes upon detection of direction of target based on phase difference between received reflected waves
A radar apparatus has a plurality of receiving antennas and an array transmitting antenna controlled to successively vary the direction of a transmitted beam within a range which includes a target...
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8035548 |
Evaluation method, particularly for a driver assistance system of a motor vehicle, for object detection using a radar sensor
An evaluation method, e.g., for a driver assistance system of a motor vehicle, is provided for object detection using a radar sensor, which synchronously emits at least two separate radar beam...
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7999726 |
Antenna pointing bias estimation using radar imaging
A system for estimating an antenna boresight direction. The novel system includes a first circuit for receiving a Doppler measurement and a line-of-sight direction measurement corresponding with...
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7999212 |
Precision guided munitions
A guidance system for actively guiding a projectile, such as a bullet after it has been fired from a gun. The guidance system includes a radar unit that includes a plurality of receiver arrays. An...
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RE42472 |
Main beam alignment verification for tracking antennas
A method for main beam alignment verification includes providing data pertaining to one or more patterns associated with an antenna, measuring power levels of a signal acquired by the antenna, and...
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7911371 |
Extraction of relative signals from closely spaced targets in a monopulse system
Systems and methods are provided for extracting relative signal parameters representing two closely spaced targets from monopulse scan data. A maximum quadrature angle value from the scan data is...
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7903023 |
Obstacle detection system notably for an anticollision system
The present invention relates to system for detecting obstacles (13, 55, 56, 57) on the ground (15) onboard a carrier (1). The detection system comprises at least two continuous-wave radars (2, 3,...
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7889115 |
System and method for tracking and identifying aircraft and ground equipment
In accordance with one or more embodiments of the present disclosure, systems and methods disclosed herein provide for tracking of objects, aircraft, vehicles, and ground equipment in a tracking...
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7884756 |
Radar apparatus
A radar apparatus measures an azimuth angle with a calculation device that performs super-resolution angle measuring processing in which relative speeds and relative distances among target objects...
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7868818 |
Multi-element antenna
An antenna is provided, in combination with an associated switch array, the antenna comprising a number of antenna elements mounted above a ground plane for providing coverage over a predetermined...
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7868816 |
Radio detection device and method
A radio detection device includes two or more reception antennas, for detecting a detecting object by a mono-pulse method; the radio detection device including: a variable gain unit for discretely...
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7864099 |
Low cost short range radar
A low cost radar system that employs monopulse beamforming to detect objects in the road-way both in elevation and azimuth. In one non-limiting embodiment, a beamforming receiver architecture...
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7864103 |
Device and method for 3D height-finding avian radar
A height-finding 3D avian radar comprises an azimuthally scanning radar system with means of varying the elevation pointing angle of the antenna. The elevation angle can be varied by employing...
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7859451 |
Method and system for monopulse radar target angle determination
A method for determining target angles based on data received from a monopulse radar array antenna includes receiving from a beamformer that generates beams from signals generated by the monopulse...
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7834803 |
Electronically steered, dual-polarized, dual-plane, monopulse antenna feed
A method and apparatus for electronically steering a RADAR beam across an array of feed horns by moving the phase center of the beam to different origination points on the array—each origination p...
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7675456 |
Technique for mitigating multipath impacts on azimuth accuracy in a monopulse interrogator
A method for mitigating multipath impacts on azimuth accuracy in a monopulse interrogator is accomplished by calculating samples of monopulse ratio for samples of antenna boresight angles based on...
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7667638 |
Detection and resolution of closely spaced targets in a monopulse system
Systems and methods are provided for determining first and second azimuth angle values representing two closely spaced targets. Monopulse radar scan data is produced and processed to provide...
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7626536 |
Non-scanning radar for detecting and tracking targets
Radar for detecting and tracking short range airborne targets using a non-scanning beam to illuminate the entire search space, and processing the return signals from a plurality of spaced apart...
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7612706 |
Monopulse radar apparatus and antenna switch
An antenna unit includes at least one transmission antenna and plural reception antennas. A receiver detects information including azimuth information for a target, based on an output from the...
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7577464 |
Compact antenna system for polarization sensitive null steering and direction-finding
A compact, non-phased-array, electronically reconfigurable antenna (ERA) system with at least two operational modes has a first operational objective that is polarization-sensitive null steering...
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7548189 |
Using radar targets of opportunity to build a monopulse calibration table
In a radar system, a monopulse calibration table is constructed from live targets of opportunity. A center of gravity or weighted average of normalized signals ΔV received at SUM and DIFF channels ...
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7548186 |
Method and apparatus for detection of an electromagnetic signal reflected from and object
For detection of an electromagnetic signal, which is transmitted from a transmitting antenna (1), by means of at least two at least essentially identical receiving antennas (3, 4), whose...
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7535408 |
Apparatus and methods for detection of multiple targets within radar resolution cell
A method and apparatus is operative for multiple target detection in a radar system which employs a radar waveform of two or more frequency diverse subpulses. The apparatus adds coherent processing...
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7522120 |
Antenna apparatus of mobile communications terminal and operation method thereof
An antenna apparatus for a mobile communications terminal and its operation method in which the length of an antenna can be varied according to the changes in the usage environment. The antenna...
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7522097 |
Radar platform angular motion compensation
A method to compensate for radar platform angular motion may include measuring or estimating any radar platform angular motion. The method may also include substantially decoupling each array...
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7492306 |
Boundary crossing object detection system
An boundary monitoring apparatus comprising an object detection device arranged to transmit a signal into a detection region and to detect an object in said detection region upon receipt of a...
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7417584 |
Monopulse radar estimation of target altitude at low angles of elevation
A monopulse radar operating at low angles of elevation (LOE) receives returns from a target by a direct path and by a path including a reflection from that portion of the Earth's surface lying...
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7330149 |
Method for locating multiple angle sources using a monopulse radar
A monopulse radar tracking method which analyzes boresight error information provided a monopulse radar to determine a location for two targets. The monopulse radar tracking method analyzes the...
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7292179 |
Instantaneous passive range finding
A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two...
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7268724 |
Reduced-error monopulse processor
This monopulse processor provides target position information having an RMS error which is less than that of a conventional monopulse processor. A Σ±jΔ vs. Σ processor is modified to provide a pos...
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7262729 |
Radio detection and ranging intrusion detection system
A radar system having a processor, a waveform generator, a plurality of antenna interfaces, a set of first antennas configured to transmit a waveform, and a set of second antennas configured to...
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7250902 |
Method of generating accurate estimates of azimuth and elevation angles of a target for a phased—phased array rotating radar
A method and apparatus for generating accurate estimates of a radar target's azimuth and elevation angles for a phased-phased array rotating radar. Scan modulated coherently integrated (SMCI)...
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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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7218272 |
Reducing antenna boresight error
Reducing antenna boresight error includes receiving radar pulses reflected from the ground, where pulses are emitted from the antenna of a radar system, reflected by the ground, and received by the...
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7218273 |
Method and device for boresighting an antenna on a moving platform using a moving target
A technique for boresighting an antenna mounted on a moving platform is described. The technique uses a concurrently moving calibration target. Target navigation data and platform navigation data...
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7212152 |
Monopulse radar system
The present invention provides that a monopulse radar system to correct an amplitude error and a phase error developed between receiving channels and improve the accuracy of a detected angle. A...
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7205932 |
Method and apparatus for improved determination of range and angle of arrival utilizing a two tone CW radar
An improved system is provided for aiming a shotgun-based or other countermeasure system so as to be able to countermeasure incoming rockets or projectiles. In one embodiment a shotgun aimed and...
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7162200 |
Antenna calibration system and method
An antenna calibration system consists mainly of a signal source, an antenna, a first radio frequency mixer, a first local oscillator, an power detecting device, a personal computer, and a servo...
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7136014 |
System and method for estimating the azimuth pointing angle of a moving monopulse antenna
An invention is provided for determining the azimuth pointing angle of a moving monopulse antenna. Pulses of energy are broadcast at the surface of a planetary body. Reflected signals are received...
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7053815 |
Radar tracking system
A radar tracking system for an anti-aircraft, missile, including angle tracking, doppler tracking and range tracking feedback loops operating on sum and difference channels. Fast fourier transform...
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7038615 |
Efficient technique for estimating elevation angle when using a broad beam for search in a radar
A method and apparatus for estimating elevation angle when using a broad search beam such as a cosecant-squared beam is provided. The range of a target detected during a search with a broad beam...
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6937186 |
Main beam alignment verification for tracking antennas
A method for main beam alignment verification includes providing data pertaining to one or more patterns associated with an antenna, measuring power levels of a signal acquired by the antenna, and...
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6867726 |
Combining sidelobe canceller and mainlobe canceller for adaptive monopulse radar processing
An improvement in monopulse radar achieves nulling of a single mainlobe jammer and multiple sidelobe jammers while maintaining the angle measurement accuracy of the monopulse ratio by cascading a...
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6853330 |
Inverse precision velocity update for monopulse calibration
A radar system derives a correction for an actual boresight (311) of a radar monopulse antenna mounted on a moving platform from Σ data and Δ data generated with respect to an a priori known, c...
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6853329 |
Monopulse radar system
A monopulse radar system for detecting an azimuth depending upon amplitude difference or phase difference between signals respectively received by plural receiving antennas, includes: a...
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6801156 |
Frequency-agile monopulse technique for resolving closely spaced targets
A monopulse radar system generates elevation and azimuth difference monopulse estimates of the location of targets in each range cell, where the target may be either a single or plural target, each...
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6771205 |
Shipboard point defense system and elements therefor
A combined defense and navigational system on a naval vessel is disclosed. The disclosed system includes a track-while-scan pulse radar which is controlled to provide either navigational...
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6762711 |
Method for detecting target objects and for determining their direction and the like for a radar device
In a method for detecting target objects and determining their direction, range, speed and the like for a radar device, the invention provides that at least three transmitting and receiving devices...
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6753802 |
Null filter
An electronic circuit for use in an anti-radiation missile system of the type which uses the electromagnetic transmissions of a target radar for guidance information, detects when the missile has...
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