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| Number | Title | Issue Date |
| 8106814 | Method of estimating the elevation of a ballistic projectile The present invention relates to a method enabling precise determination of the elevation of a projectile following a ballistic trajectory by use of a conventional Doppler surveillance radar. The method includes calculating first the estimate {circumflex over (Γ)} | 01/31/2012 |
| 7782246 | Methods and apparatus for selecting a target from radar tracking data Methods and apparatus for selecting a target from radar data according to various aspects of the present invention operate in conjunction with a real-time data source and a countermeasure system. The real-time data source provides tracking information for at least o... | 08/24/2010 |
| 7417581 | System and method for intrusion detection using a time domain radar array A system and method for highly selective intrusion detection using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array around the perimeter of a building. Each TM-UWB radar transmits ultra wideban... | 08/26/2008 |
| 7394422 | Interferometer-type radar A transmitter for transmitting signals to targets and a receiver for receiving signals reflected from targets are included. The transmitter outputs CW signals for detecting direction and velocity of the target. The receiver performs: a function of receiving signals ... | 07/01/2008 |
| 7391355 | Single platform geolocation method and apparatus A geolocation system and method uses a single platform for determining a Doppler measurement set of a targeted aircraft or signal of interest. The electronic warfare aircraft and the ejected aircraft expendables technology device determine the Doppler measurement se... | 06/24/2008 |
| 7359713 | Battery consumption optimization for mobile users Systems and methods are disclosed to provide power management for a mobile communication device having a location determination function. The frequency of the location determination function may be adjusted based on whether the mobile communication device is moving ... | 04/15/2008 |
| 7358888 | System and method for intrusion detection using a time domain radar array A system and method for highly selective intrusion detection using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array around the perimeter of a building. Each TM-UWB radar transmits ultra wideban... | 04/15/2008 |
| 7301496 | Radar apparatus In an FM-CW radar apparatus which determines the azimuth to a target by a phase monopulse technique, an abnormal value resulting from the presence of multiple targets is detected. Three receiving antennas are arranged at spacings of 5λ/4 and 6λ/4, respectively, an... | 11/27/2007 |
| 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 the returns surpassing a threshold detected in one range azimuth bin an... | 08/21/2007 |
| 7248206 | Instantaneous multisensor angular bias autoregistration Unknown alignment biases of sensors of a tracking system are estimated by an iterative Kalman filter method. Current measurements are corrected for known alignment errors and previously estimated alignment biases. The filter time reference is updated to produce esti... | 07/24/2007 |
| 7236123 | System for enhanced detection of a target Disclosed herein is a computer-readable medium having stored thereon computer-executable instructions for providing phase-range data associated with a return pulse of a radar device and second phase-range data associated with a successive return pulse of the radar d... | 06/26/2007 |
| 7231197 | Angle rate interferometer and passive ranger A receiver includes a processor and an RF bridge. The RF bridge is coupled to the processor to receive a reference signal from the processor. The RF bridge includes first and second frequency converters coupled to respective first and second antennas. The RF bridge ... | 06/12/2007 |
| 7225587 | Cover system for septic tank A cover system for septic tanks adapted to be attached to the a septic tank and provide access for repair and maintenance. The assembly includes a base which is embedded into the concrete and provides a seal between the concrete and the base. A pipe member is joined... | 06/05/2007 |
| 7218277 | Antenna failure detection The present invention provides an apparatus, method, and computer-executable program for detecting antenna failures in directional antennas. In particular, the present invention compares a bearing calculated from received positional data concerning a target to the b... | 05/15/2007 |
| 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 receiving a phase history of a target point scatterer. From the phase history... | 05/01/2007 |
| 7196654 | Vehicle positioning and tracking radar system A vehicle positioning and tracking radar system includes a rotating antenna with a pair of spatially separated transmit feeds for simultaneously transmitting a pair of frequency-modulated continuous-wave (FMCW) electromagnetic signals having a first polarisation and... | 03/27/2007 |
| 7190305 | Radar apparatus In a radar apparatus, a receiving antenna includes a plurality of antenna elements, each receiving, as a reception signal, radio waves emitted into space and reflected off a target object. An analog signal is obtained by downconverting and putting a bandwidth constr... | 03/13/2007 |
| 7190306 | Method and system for detecting with radar the passage by a vehicle of a point for monitoring on a road The invention relates to a method for detecting the passage by a vehicle of a determined point for monitoring on a road, wherein from a remotely situated location a radar beam is transmitted continuously to the point for monitoring, reflections from the transmitted ... | 03/13/2007 |
| 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 corresponding spectrally processed data to cancel clutter. It is further process... | 09/19/2006 |
| 7100866 | Control system for a flying vehicle In one embodiment of the present invention there is described a vehicle having a propeller mechanism for propelling the vehicle in a horizontal direction. The vehicle includes a transmitter positioned on the bottom of the vehicle for transmitting a signal from the v... | 09/05/2006 |
| 7084807 | Method and apparatus for generating HF signals for determining a distance and/or a speed of an object The present invention provides a method for generating HF signals for determining a distance and/or a speed of an object, having the following steps: generating a pulsed demodulated signal (6′) from a first signal (3) and a second signal (4) i... | 08/01/2006 |
| 7068212 | Doppler complex FFT police radar with direction sensing capability A series of police Doppler single mode radars and a multimode police Doppler radar, all with direction sensing capability are disclosed. A quadrature front end which mixes received RF with a local oscillator to generate two channels of Doppler signals, one channel b... | 06/27/2006 |
| 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 covering a broad angular search area is determined. Based on the determ... | 05/02/2006 |
| 6924762 | Radar designed to acquire radar data with high accuracy A radar is provided which transmits a radar wave whose frequency is so modulated as to rise, fall, and be kept constant cyclically. The radar uses beat signals produced by the radar wave and radar echoes received by two antennas to produce radar data on a target. Wh... | 08/02/2005 |
| 6911934 | Apparatus, method and articles of manufacture for sequential lobing high resolution radar A sensor front end that is able to discriminate objects based on their range from the sensor and to derive bearing information therefrom. The sensor system may include a signal source for generating source signal; an antenna system for transmitting the source signal... | 06/28/2005 |
| 6882304 | Device for a radar system A device for a radar system, the device being supplied with the received signals of at least two receiving antennas as input signals, and in which the output signals of this device are supplied to at least one unit for evaluating the received signals which includes ... | 04/19/2005 |
| 6801152 | Method for determining the optimum observer heading change in bearings-only passive emitter tracking Emitter target range and heading are estimated from bearing measurements enhancing bearings-only estimator convergence to a target track, and permitting optimization of an observer position relative to the target at the end of the total bearing measurement period. O... | 10/05/2004 |
| 6791475 | Non-stop toll collection method and system A plurality of roadside wireless devices are provided on a roadside of an entry of a toll area. A first roadside wireless device, which communicates with a vehicle-mounted device over wireless communication, sends unique information obtained from the vehicle-mounted... | 09/14/2004 |
| 6774837 | Ocean surface current mapping with bistatic HF radar A bistatic radar system (100), method and computer program (178) are provided for mapping of oceanic surface conditions. Generally, the system (100) includes at least one transmitter (102) and at least one receiver (106) located se... | 08/10/2004 |
| 6720908 | Sensor front-end for range and bearing measurement A method for measuring range and bearing of an object. At least a portion of a first signal is transmitted from a sensor. The transmitted signal is reflected from an object and received by the sensor. At least a portion of the first signal is applied a first mixer a... | 04/13/2004 |
| 6714155 | Method of passively estimating an emitter's position and velocity using bearings-only without requiring observer acceleration A method of estimating emitter range and heading from bearing measurements without requiring observer heading change or observer acceleration during the bearing measurement collection period. Emitter signal characteristics are measured and a set of parameters charac... | 03/30/2004 |
| 6707418 | Correlating single continuous wave radar space object observation for initial orbit determination Correlating observations of objects in the sky to determine an orbit includes identifying an initially identified object, determining if the initially identified object will be identifiable again, and identifying a subsequently identified object. A determination is ... | 03/16/2004 |
| 6677887 | Intrusion detection radar system An outdoor microwave transceiver intrusion detector that alternately transmits pulses of RF energy at two different frequencies and uses range and direction of travel information derived from the phase of the two Doppler responses to optimize the signal p... | 01/13/2004 |
| 6646589 | Radar designed to minimize error in detecting target An FMCW radar is provided which may be employed in automotive anti-collision or radar cruise control systems. In a distance measuring mode, only one of channels is used to sample a beat signal continuously, thereby allowing a sampling frequency to be incr... | 11/11/2003 |
| 6646601 | Direction finding method Determining the angle of arrival of a signal by providing a plurality of antennae, sampling, in turn, the output from each of the antennae to obtain a set of samples, each of the samples relating to different points in time, performing a Fourier transform... | 11/11/2003 |
| 6618000 | Method and device for controlling the distance from a vehicle to a preceding vehicle In a method and apparatus for controlling the distance of a vehicle to a vehicle traveling ahead, in which the distance and the relative velocity of the vehicle traveling ahead are measured and the distance, in a distance control mode, is controlled by ac... | 09/09/2003 |
| 6594577 | Traveling support information processing system A traveling support information processing unit which can prevent willful assessment of information by a device installed on a road or loaded in a vehicle and makes it possible for the device to always issue a demand for acquisition of required informatio... | 07/15/2003 |
| 6577238 | RFID detection system A system 100 is disclosed for monitoring the position of one or more RFID tags 201. The system has a detector 301 incorporating circuitry 304 for detecting changes in the range of an RFID tag 201 from the detector and for triggering an alarm 401 if a dete... | 06/10/2003 |
| 6469656 | Method of detecting moving and/or stationary objects in the path of a vehicle A method is described for detecting moving and/or stationary objects in the path of a vehicle, where the distance and velocity of the reflecting object are determined by using a radar sensor, where the frequency of the signal transmitted is modulated in t... | 10/22/2002 |
| 6420996 | Integrated radar and active transponder collision prediction system A method and apparatus for permitting a host automotive vehicle to avoid or mitigate the consequences of a collision between the host vehicle and a target automotive vehicle by using a combination of radar derived target information and transponder inform... | 07/16/2002 |
