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| Number | Title | Issue Date |
| 8159387 | Multi-transmitter interferometry Systems and methods for obtaining target elevation information are disclosed. The systems and methods use multiple vertical transmitters and one or more receivers to infer changes in the elevation plane and the height of objects. Changes in elevation and heights of ... | 04/17/2012 |
| 7973702 | Apparatus for position detection using multiple HCF transmissions An apparatus a transmitter section, a receiver section, and a processing module. The transmitter section transmits a plurality of high carrier frequency beamformed signals in a loop manner until a desired number of signals has been transmitted. The receiver section ... | 07/05/2011 |
| 7936301 | Stepped frequency radar A multi-port junction is fed with a frequency-stepped source and has one of its ports connected to an antenna that can serve either as a transmit-and-receive antenna or as a receive antenna only, with the outputs of the multi-port junction being used to estimate a c... | 05/03/2011 |
| 7864107 | RF receiver sensing by harmonic generation The system includes a transmitter, at least one detection system receiver, a modulated signal source, and a directional receive antenna. The transmitter emits a high power illuminating signal at a receive frequency of a target RF receiver to be detected. The high po... | 01/04/2011 |
| 7639178 | System and method for detecting receivers The present invention is a system and method for detecting devices with receivers, such as explosive devices with receivers used to remotely detonate the explosive devices. The system for detecting devices may include a transmitter which transmits a signal causing s... | 12/29/2009 |
| 7570200 | Stepped frequency radar In the invention, a four-port junction (10) has a port (12) connected to an RF signal source (14). The four-port junction (10) also has an antenna port (16) coupled to a combined transmit/receive antenna (18). Two ports (... | 08/04/2009 |
| 7498976 | System and method for passively estimating angle and range of a source using signal samples collected simultaneously from a multi-aperture antenna A system and method for passively estimating range and angle of a source are disclosed. The source may be any wave source including radio-frequency (RF), optical, acoustic or seismic sources. In some RF embodiments, the system includes a single aperture antenna to s... | 03/03/2009 |
| 7474256 | Position detecting system, and transmitting and receiving apparatuses for the position detecting system A transmitting apparatus and a receiving apparatus of a position detecting system execute a program including the steps of transmitting a laser beam; detecting an azimuth α(Y) at which the laser beam is transmitted; detecting an azimuth β at which the reflected la... | 01/06/2009 |
| 7468689 | System and method for determining position of radar apparatus based on reflected signals A system and method for determining position of, for example, a robot based on reflected signals comprises a transmitter for transmitting signals in a number of directions within a range of directions and a receiver for receiving echoes of the signals from any direc... | 12/23/2008 |
| 7466262 | Positioning system with a sparse antenna array In one embodiment of a positioning system, a transmit element is configured to transmit at least one electromagnetic pulse having a carrier signal frequency. An antenna array with a plurality of receive elements includes at least two receive elements separated by a ... | 12/16/2008 |
| 7427945 | Positioning system with co-polarized and cross-polarized mapping A local positioning system using co-polarized and cross-polarized radar mapping is provided. In one embodiment of the method, at least a first electromagnetic pulse having a first polarization is transmitted. A first return signal preferentially having the first pol... | 09/23/2008 |
| 7423580 | Method and system of three-dimensional positional finding The present invention is an RF system and methods for finding a target T in three dimensional space configured to have a transponder disposed on the target T, a monitoring unit configured as a transceiver for determining or monitoring the location of the target T an... | 09/09/2008 |
| 7417585 | Radar scanning method A scanning method of an in-vehicle scanning-type radar for emitting beams subsequently to execute scanning and for detecting an object includes determining whether or not the object is in an approaching state. When it is determined that the object is not in the appr... | 08/26/2008 |
| 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 |
| 7414567 | ADS-B radar system A system and method of using a standard ADS-B transmitter and encoder to identify targets to provide a collision avoidance system, wherein the method includes the steps of providing a standard ADS-B transmitter and encoder, a phase modulator including a digital synt... | 08/19/2008 |
| 7400291 | Local positioning system which operates based on reflected wireless signals A local positioning system is proposed for wirelessly locating an object using existing features within a static environment, such as walls, as the references for determining the position of the system. An antenna 16 attached to the object transmits RF signal... | 07/15/2008 |
| 7397366 | Method and apparatus for locating a person who has been buried alive A search apparatus and related method facilitate the final stage of a search for a buried person carrying a transmitter. When the searcher is in the close vicinity of the buried transmitter, the search enters a point-localization phase where the apparatus displays a... | 07/08/2008 |
| 7385551 | Polarization sensitive synthetic aperture radar system and method for local positioning A positioning system includes a passive, isotropic reflecting landmark at a fixed position and a device. The device transmits an electromagnetic pulse having a circular polarization and receives a return signal over a period of time. The return signal includes a ref... | 06/10/2008 |
| 7375675 | Method and system for multiple target class data recording, processing and display for over-the-horizon radar A method and apparatus are disclosed that enable an over-the-horizon-radar (OTHR) system to detect and track multiple target classes simultaneously, where target classes are defined by the speed and acceleration of the tracked objects. The OTHR is tasked in a starin... | 05/20/2008 |
| 7365676 | Sensor for transmitting and receiving electromagnetic signals The invention relates to a sensor comprising a housing, inside of which a transmitting antenna array that transmits electromagnetic transmission signals in a radiation area and a receiving antenna array that receives received signals reflected by at least one object... | 04/29/2008 |
| 7362258 | Transponder detection system using radio and light wave signals A target object detection system for detecting a target object using a detector and a tag on the target object; the tag includes a radio wave receiver receiving radio wave from the detector; a light receiver receiving a light signal from the detector; a receipt sign... | 04/22/2008 |
| 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 |
| 7348918 | Mobile ballistic missile detection and defense system The present invention is directed towards a ballistic missile detection and defense system. The system of the present invention comprises a ship based interceptor or antiballistic missile, a missile launch detection and tracking system, and a signal processing syste... | 03/25/2008 |
| 7345621 | Real-time multistatic radar signal processing system and method A real-time signal processing engine robustly detects, localizes, tracks and classifies ground targets based on radar signals from a multistatic radar system. The system differentiates between different targets based on an optimized cost function, which can include ... | 03/18/2008 |
| 7327306 | RF system for tracking objects A system for tracking an object in space for position, comprises a transponder device connectable to the object. The transponder device has one or several transponder aerial(s) and a transponder circuit connected to the transponder aerial for receiving an RF signal ... | 02/05/2008 |
| 7321330 | Ball measuring apparatus The present invention provides a ball measuring apparatus capable of measuring a trajectory of a ball from a hitting position to a landing position, the landing position and a stop position. A ball measuring apparatus 100 according to a first embodiment inclu... | 01/22/2008 |
| 7315275 | Positioning system with intentional multi-path signal A positioning system includes a device, having an antenna and a reflector with a known position proximate to the antenna, that transmits at least an electromagnetic pulse having a carrier signal frequency. The device receives a return signal over a period of time, w... | 01/01/2008 |
| 7304602 | Axial deviation determining method for on-vehicle radar An on-vehicle radar and a method of determining an axial deviation of the radar using stationary objects free of erroneous determination are disclosed. The amount of axial deviation of the radar is determined from the calculated stationary object line based on the d... | 12/04/2007 |
| 7301453 | Locator system and method A locator system includes two main components, namely, (1) a beacon tag that is readily attached to a person or article, and (2) a transportable finder or receiver/processor for sensing the relative position of the tag and indicating changes in that relative positio... | 11/27/2007 |
| 7298255 | Sensory systems employing non-uniformly spaced waveguide sensors for determining orientation and rotational speed of objects A sensory system for determining the orientation of an object, wherein the sensory system includes a plurality of non-uniformly spaced waveguide sensors or array(s) of waveguide sensors. The non-uniformly spaced waveguide sensors are responsive to received radio fre... | 11/20/2007 |
| 7295150 | Methods and systems for identifying high-quality phase angle measurements in an interferometric radar system A method for determining a mechanical angle to a radar target utilizing a multiple antenna radar altimeter is described. The method comprises receiving radar return signals at the multiple antennas, populating an ambiguity resolution matrix with the electrical phase... | 11/13/2007 |
| 7295147 | Sensor arrangement and method for regulating the distance of motor vehicles A sensor system on motor vehicles for locating objects in front of the vehicle, wherein at least two sensors, each having a locating depth of at least 50 m, are arranged in such a way on both sides of longitudinal center axis of the vehicle that their locating angul... | 11/13/2007 |
| 7292180 | System and method for passively estimating angle and range of a source using signal samples collected simultaneously from a multi-aperture antenna A system and method for passively estimating range and angle of a source are disclosed. The source may be any wave source including radio-frequency (RF), optical, acoustic or seismic sources. In some RF embodiments, the system includes a single aperture antenna to s... | 11/06/2007 |
| 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 points on the platform in a common time sample; detecting the received... | 11/06/2007 |
| 7289059 | Method and device for course prediction in motor vehicles A method and a device for course prediction in motor vehicles, which have a position-finding system for objects situated in front of the vehicle, where a function describing the path of the roadway is calculated on the basis of measured distance and angular data, in... | 10/30/2007 |
| 7286077 | Method and device for aiding the landing of an aircraft on a runway A system for aiding the landing of an aircraft on a runway uses an angular vertical position of the aircraft and includes at least one landing aid radio. In a stand-alone manner, the position of the aircraft in latitude and longitude is determined, and the position ... | 10/23/2007 |
| 7280072 | System for the relative navigation of aircraft and spacecraft using a phased array antenna A system for the relative navigation of aircraft and spacecraft is disclosed which uses a series of short duration, unmodulated radio pulses transmitted from a phased array antenna. The aircraft or spacecraft whose position is to be determined from another is called... | 10/09/2007 |
| 7274324 | Apparatus and method of tracking objects in flight A path in three-dimensions for an object in flight is determined according to a radar signal reflected by the object. The radar signal is transmitted at an offset angle from horizontal sufficient to capture the object within the transmitted radar signal. The transmi... | 09/25/2007 |
| 7268723 | System and method for locating targets using measurements from a space based radar A system and method for determining a position of a target within an acceptable tolerance using an iterative approach. A airborne or space-based measuring device is used to measure an estimated position of the target. The information from the measuring device is use... | 09/11/2007 |
| 7265710 | Multipath height finding method A method for determining the height HT of a target above a surface, the method comprising the steps of determining a distance R from a source to a target, determining a distance L representative of a distance traveled by a signal from the target that is r... | 09/04/2007 |
