Combined With Primary Radar System Patents (Class 342/43)
  • Patent number: 10670707
    Abstract: An interrogator and system employing the same. In one embodiment, the interrogator includes a receiver configured to receive a return signal from a tag and a sensing module configured to provide a time associated with the return signal. The interrogator also includes a processor configured to employ synthetic aperture radar processing on the return signal in accordance with the time to locate a position of the tag.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: June 2, 2020
    Assignee: Lone Star IP Holdings, LP
    Inventors: Hugh Logan Scott, Steven D. Roemerman, John P. Volpi
  • Patent number: 10464433
    Abstract: A method for ascertaining positional data describing a position of a motor vehicle relative to a stationary charging device as a destination. At the charging device end, a plurality of electromagnetic transmission signals are emitted from respectively different transmitting positions that are arranged in a transmitting position pattern and have respectively at least one signal characteristic that can be differentiated by the motor vehicle during reception. After which, for each reception signal received, signal strength data that describe its reception strength are produced, and the positional data are determined from the data, taking into consideration transmitter information describing the transmitting position pattern and an assignment of the transmitting positions to the signal characteristics.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: November 5, 2019
    Assignee: AUDI AG
    Inventors: Reinhard Peer, Matthias Hardt
  • Patent number: 9557414
    Abstract: An ultra-broadband coherent radar transponder for precision tracking, and in particular a transponder arrangement having an antenna, receiver, control logic, delay, and transmitter components arranged to coherently amplify, delay and repeat back a reference signal to be utilized by a microwave radar system for high fidelity tracking.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: January 31, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Donald G. Morgan, Justian A. Neely, John R. Smith, Paul M. Haldeman, Jr.
  • Patent number: 9469248
    Abstract: A method and system for providing situational awareness in a vehicle. The method and system include receiving environmental sensor data and vehicle performance sensor data. The method and system also include compiling the environmental sensor data and the vehicle performance data. The method and system additionally include determining one or more situational risks that are posed to the vehicle that occur within a surrounding environment of the vehicle based on the compiled environmental sensor data and the vehicle performance data. The method and system further include generating one or more projected graphical objects that represent the one or more situational risks that are determined to be posed to the vehicle.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: October 18, 2016
    Assignee: Honda Motor Co., Ltd.
    Inventors: Victor Ng-Thow-Hing, Karlin Bark, Cuong Tran
  • Patent number: 9470787
    Abstract: An interrogator and system employing the same. In one embodiment, the interrogator includes a receiver configured to receive a return signal from a tag and a sensing module configured to provide a time associated with the return signal. The interrogator also includes a processor configured to employ synthetic aperture radar processing on the return signal in accordance with the time to locate a position of the tag.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: October 18, 2016
    Assignee: Lone Star IP Holdings, LP
    Inventors: Hugh Logan Scott, Steven D. Roemerman, John P. Volpi
  • Patent number: 8981988
    Abstract: A radar system is provided. The system includes a radar transceiving device equipped in a movable body and for transmitting an electromagnetic wave at a first frequency, and a transponder device arranged in a beacon and for transmitting a response wave upon receiving the electromagnetic wave. The transponder device includes a response wave transmitting module for transmitting, when a radar classification of the radar transceiving device is a solid-state radar, a response wave at a second frequency different from the first frequency in response to receiving the transmitted electromagnetic wave. The radar transceiving device includes a transmitting module for transmitting the electromagnetic wave, a receiving module for receiving a radar echo at the first frequency and the response wave at the second frequency, and a display controlling module for displaying, on a predetermined radar display unit, locations of the beacon and another movable body existing around the movable body.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: March 17, 2015
    Assignee: Furuno Electric Company Limited
    Inventors: Tatsuya Kojima, Jun Yamabayashi
  • Publication number: 20150054675
    Abstract: Methods for determining a range rate of a backscatter transponder and readers implementing the methods are described. The reader transmits a continuous wave signal and receives a modulated reflected response signal from the transponder, mixes the modulated reflected response signal with the carrier frequency to produce a downconverted signal, bandpass filters the downconverted signal to pass a bandpass filtered signal containing at least the modulation frequency, applies a non-linear amplitude transfer function to produce a modulation-suppressed signal, and measures the frequency of the modulation-suppressed signal and determines the range rate from the measured frequency.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 26, 2015
    Inventors: Lila Vinski, Japjeev Kohli, Alastair Malarky
  • Patent number: 8896467
    Abstract: Methods and an appropriately setup communication unit for positioning in vehicle-to-surroundings communication are described, wherein the method involves a first sensor (S1) of a first communication subscriber using a transmission and reception unit to emit a challenge pulse, to which a transmission and reception unit of a second sensor (S2) of a second communication subscriber responds with a response pulse. The response pulse is received and evaluated by the first sensor (S1) and positioning is performed. In order to achieve reliable cooperative sensor communication, the transmission and reception units of the first and second sensors (S1, S2) use a frequency band (SCH2) which is reserved for vehicle-oriented safety applications.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: November 25, 2014
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Ulrich Stählin, Marc Menzel, Stephan Zecha, Oliver Scherf
  • Publication number: 20140225761
    Abstract: A transponder, able to equip a cooperative target facing a Doppler radar, includes at least one receiving antenna able to receive a signal transmitted by said radar and a transmitting antenna able to retransmit a signal. The signal received by the receiving antenna is amplitude-modulated before being retransmitted by the transmitting antenna to produce a variation of the radar cross-section of the target, the variation triggering a frequency shift between the signal transmitted and the signal received by the radar comparable to a Doppler echo. The transponder applies notably to the field of radars, more particularly for collaborative systems also operating at low velocity or nil velocity. It applies for example to assisted take-off, landing and deck-landing of drones, in particular rotary-wing drones, as well as manned helicopters.
    Type: Application
    Filed: February 7, 2014
    Publication date: August 14, 2014
    Inventors: Patrick GARREC, Pascal CORNIC, Régis LEVAUFRE
  • Patent number: 8730014
    Abstract: An improved system and method for monitoring objects, people, animals, or places uses a passive Modulating Reflector (MR) tag where a characteristic of an antenna is modified according to a time-varying pattern by a modulating network thereby causing the reflective characteristics of the antenna to vary in accordance with the time-varying pattern. When an interrogator transmits an RF waveform that impinges on the antenna, the return signal reflecting off the antenna is modulated in accordance with the time-varying pattern allowing a remote receiver to demodulate information from the modulated return signal. The antenna is embedded in a dielectric material. The MR tag can be used with a wide variety of tag-interrogator configurations employing monostatic and/or bistatic radar techniques to allow monitoring, locating, and/or tracking of objects, people, animals, or place with which MR tags are associated.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 20, 2014
    Assignee: Cedar Ridge Research, LLC
    Inventor: Larry W. Fullerton
  • Patent number: 8552903
    Abstract: Various techniques are described relating to verifying a distance between devices. A distance between two devices may be verified by requiring one of the devices to take one or more actions that generate a result that is only possible if the device is at most a given distance from the other device. In some aspects verified ranging is accomplished through the use of a ranging signal and a responsive signal. In some aspects the ranging signal may comprise a random, pseudorandom, or deterministic sequence. A responding device may operate on a ranging signal in accordance with a known function to generate a responsive signal. A ranging device also may perform operations to determine the likelihood that a responding device properly operated on a ranging signal that the ranging device transmitted to the responding device.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: October 8, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: David Jonathan Julian, Amal Ekbal, Chong U. Lee
  • Patent number: 8432253
    Abstract: Active RFID technologies are used to tag assets and people within buildings or open areas, such as parking lots or military bases; and to identify, preferably within a few meters, the real-time location (RTL) of the tag, i.e. to create a real-time location system, known as an RTLS. A novel and complex algorithm is provided that combines signal strength computations with factors that incorporate physical realities, such as walls and floors, to determine a tag's real-time location more accurately.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 30, 2013
    Assignee: Al-Qemmah Letechnologia Al-Ma'Loumat Co. (SIMTIX)
    Inventors: Robert Ainsbury, Immad Adawiya, Khalid Omar
  • Patent number: 8390505
    Abstract: A process and a device for detecting aircrafts circulating in an air space surrounding an airplane is disclosed. The device (1A) comprises means (2, 3) for detecting an aircraft circulating in the air space surrounding the airplane and, in case of a detection, for determining a first position and a second position of the aircraft with respect to the airplane, and means (8A) for comparing said first and second positions so as to check whether they match.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: March 5, 2013
    Assignee: Airbus Operations (SAS)
    Inventors: Guillaume Fouet, Xavier Grossin, Sébastien Robert
  • Patent number: 8279109
    Abstract: An aircraft avian radar is implemented using an existing aircraft transponder, Mode S, or TCAS installation as the radar transmitter. To eliminate self jamming of low level avian target signals by high level transmitter signals, the ending period of the transmission signal is digitized and cross correlated with the ending period of reflected avian target signals received after the transmission signal has ended. In a first implementation, the current transponder antenna is used for both transmission and reception. In a second implementation, an external receive only antenna is mounted in a position that maximizes the transmit antenna to receive antenna isolation. In a third implementation, a signal canceller and sample of the transmit signal are used to cancel or null out as much transmit signal as possible that couples directly to the receive antenna.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: October 2, 2012
    Inventor: Gregory Hubert Piesinger
  • Patent number: 8149154
    Abstract: In certain embodiments, a method includes receiving first track information comprising data for a particular aircraft track. The method further includes receiving a first radar plot comprising first location information corresponding to first aircraft identification information and first location information corresponding to second aircraft identification information. The method further includes associating the first aircraft identification information with the particular aircraft track. The method further includes accessing historical association information comprising a first association history variable corresponding to one or more previous associations between the first aircraft identification information and the particular aircraft track and a second association history variable corresponding to one or more previous associations between the second aircraft identification information and the particular aircraft track.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 3, 2012
    Assignee: Raytheon Company
    Inventors: Wassim S. Habib, Yuchoi F. Lok
  • Patent number: 8120525
    Abstract: Systems and methods are delineated that may provide for a system for use in a merging and spacing application for an aircraft. An exemplary system may comprise a TCAS and a processor for executing the merging and spacing application using ADS-B data and data received by the aircraft in response to an interrogation of another aircraft from the TCAS. In a disclosed embodiment, a lead aircraft responds to the TCAS interrogation from a following aircraft to provide EHS heading and/or speed of the lead aircraft to the following aircraft, which uses the received EHS data as well as ADS-B data to determine merging and spacing control parameters for the following aircraft.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: February 21, 2012
    Assignee: Aviation Communication&Surveillance Systems LLC
    Inventors: Richard D. Ridenour, Charles C. Manberg
  • Publication number: 20110234446
    Abstract: An apparatus for measuring the relative direction of an incoming radio signal, the apparatus comprising at least first and second antennas, and comparison means for comparing the incoming radio signal as received at the first antenna with the incoming radio signal as received at the second antenna, and from the result of the comparison transmitting a measurement of the relative direction.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 29, 2011
    Inventor: David E. Patrick
  • Patent number: 7956796
    Abstract: A system according to the invention detects location information of a vehicle by using a reflection strength change of an electromagnetic wave. The system incorporates a radiowave transmitter which emits a first radiowave, positional markers which generate unique reflection strengths and patterns of temporal changes in the reflection strength from the emitted first radiowave at respective absolute positions, a radiowave receiver which receives a second radiowave reflected by the positional marker and converts the second radiowave into a signal format for extracting location information to output the same, and a marker recognition device which obtains a location of the vehicle from the output of the radiowave receiver. Accordingly, a highly-precise location specification with a resolution smaller than or equal to 1 cm and a highly-reliable location specification which is not affected by slip and slide of the vehicle's wheels can be realized.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: June 7, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Hyodo, Shigeru Oho, Naoki Kato
  • Patent number: 7952512
    Abstract: A method is provided for mobile device enabled radar tags. A signal is transmitted to a radar tag. The radar tag detects the signal. The radar tag provides information. The information is received from the radar tag. A location of the radar tag is determined based on the information. The radar tag is identified based on the information. The identification of the radar tag, the location of the radar tag, and a time associated with determining the location of the radar tag are recorded as data in a database. The radar tag is evaluated based on accessing a plurality of recordings of the data in the database.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: May 31, 2011
    Assignee: Sprint Communications Company L.P.
    Inventors: Jason R. Delker, John M. Everson, Jason K. Whitney
  • Patent number: 7889114
    Abstract: Systems and methods for reducing radar target processing. The systems include a processor configured to receive a first input from a cooperative surveillance source and a second input from a radar device. The first input includes cooperative target information, the second input includes cooperative and non-cooperative target information, and the processor is configured to process the first and second inputs to remove cooperative target information from the second input based on the first input to generate a modified radar output for use by an output device. The methods include receiving a first input including cooperative target information from a cooperative surveillance source, receiving a second input including cooperative and non-cooperative target information from a radar device, processing the first and second inputs to remove cooperative target information from the second input based on the first input, and generating a modified radar output based on the processed first and second inputs.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: February 15, 2011
    Assignee: Honeywell International Inc.
    Inventors: David W. Meyers, Christine Haissig, David C. Vacanti
  • Patent number: 7847722
    Abstract: Provided is a secondary surveillance radar with an improved capability of eliminating an unnecessary Mode A/C target report, which includes a transmission unit transmitting interrogations, a reception unit receiving replies, from a transponder, corresponding respectively to the interrogations, and a signal processing unit generating a Mode S target report and a Mode A/C target report from the replies. The radar also includes a combiner generating a Mode S track and a Mode A/C track respectively from the Mode S and the Mode A/C reports, and then judging whether the Mode S report and the Mode A/C report are of the same target on the basis of the Mode S and the Mode A/C tracks. When the Mode S and the Mode A/C reports are of the same target, the combiner rejects the Mode A/C report.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: December 7, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masami Ino
  • Patent number: 7817079
    Abstract: Methods and apparatuses are described that enable the automatic collection of maritime vessel location information within a global or regional framework by using a minimum network of vessels outfitted with non-intrusive AIS data collection systems. The network of vessels may comprise standard ships operating within their normal commercial or private tasks. By utilizing these non-specially tasked vessels and augmenting the received AIS reports with onboard radar/navigation information, accurate global or regional tracking information can be generated at a centralized location without incurring large costs.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: October 19, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Clarence John Funk
  • Patent number: 7786923
    Abstract: An interrogator that is to be incorporated in a communication system in which each of at least one transponder is operable, upon reception of a main carrier wave transmitted from the interrogator, to respond to the interrogator with a reflected wave that is generated by modulating the main carrier wave.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: August 31, 2010
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takuya Nagai
  • Patent number: 7777666
    Abstract: Systems and methods for mapping a surface of a celestial body containing objects and terrain are provided. One system includes a Synthetic Aperture RADAR (SAR) module configured to capture a high-resolution image of the terrain of at least a portion of the surface and a map module configured to store map data representing the portion of the surface. The system also includes a fusion module configured to combine the high-resolution image and the map data to generate a high-resolution map of the portion of the surface. A method includes orbiting the celestial body, capturing, via the SAR module, a high-resolution image during each orbit, and fusing the captured high-resolution image with a low-resolution map of the surface to generate a high-resolution map of the surface. A computer-readable medium for storing instructions that cause a processor to perform the above method is also provided.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: August 17, 2010
    Assignee: Honeywell International Inc.
    Inventors: William Gregory, Mitch Fletcher, Randy Black
  • Patent number: 7660668
    Abstract: A device and a method for triggering at least one deceleration device and/or one output-determining actuator element of a vehicle propulsion system, in particular for automatic longitudinal vehicle regulation, a first surroundings sensing device being provided, which delivers longitudinal value-optimized measured values, a second surroundings sensing device being provided, which delivers object lateral dimension-optimized measuring values, and an analyzer device being provided, which receives the output signals of the first and second surroundings sensing devices and the measured values of the first and second surroundings sensing devices being used for object identification. The device and the method are furthermore suitable for initiating or performing vehicle deceleration for collision avoidance or for alleviating the severity of a collision.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: February 9, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Bernhard Lucas, Marcus Lorei, Hermann Winner, Martin Heinebrodt, Ulrike Ahlrichs
  • Patent number: 7612708
    Abstract: 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 through the transponder aerial. The transponder device adds a known delay to the RF signal thereby producing an RF response for transmitting through the transponder aerial. A transmitter is connected to a first aerial for transmitting the RF signal through a first aerial. A receiver is connected to the first, a second and third aerials for receiving the RF response of the transponder device therethrough. A position calculator is associated to the transmitter and the receiver for calculating a position of the object as a function of the known delay and the time period between the emission of the RF signal and the reception of the RF response from the first, second and third aerials. A method is also provided.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: November 3, 2009
    Assignee: Orthosoft Inc.
    Inventor: Jean-Louis Laroche
  • Patent number: 7598905
    Abstract: There are presented various approaches to monitor performance of RF systems and circuitry such as those used in aircraft transponders. Such monitoring may be designed to verify operational performance of transponders as set forth by FAA regulations, or may be used to periodically or continually monitor integrity of transponder performance. Data may be collected by such periodic or continual monitoring, and may be analyzed to identify potentially troublesome trends in transponder performance, allowing early intervention or repair, if warranted.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: October 6, 2009
    Assignee: Aviation Communication & Surveillance Systems LLC
    Inventors: Gregory T. Stayton, Stephen P. Williams
  • Patent number: 7567203
    Abstract: A system and method for target classification for an aircraft surveillance radar is provided. In one implementation, the track classifier provides tracks with an updated probability value based on its likelihood to conform to aircraft and non-aircraft target behavior. The track classifier identifies false tracks that may arise from weather and biological targets, and can detect aircrafts lacking Secondary Surveillance Radar (SSR) data. Various features and combinations of features are evaluated using a proposed clustering performance index (CPI) and used to discriminate between aircrafts and false tracks.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: July 28, 2009
    Assignee: Raytheon Canada Limited
    Inventors: Reza M. Dizaji, Hamid Ghadaki
  • Patent number: 7504992
    Abstract: A system and method for monitoring topological changes in a defined area. A grid of sensors is arranged in the area, with known distances between them. The sensors communicate wirelessly with a host computer, which individually addresses each sensor to instruct that sensor to be in an interrogate mode or responder mode. When a sensor is in interrogate mode, it measures distance from a neighboring sensor using radar (continuous wave phase difference) measurements. When a sensor is in responder mode, it receives, delays, and returns a signal received from a neighboring sensor.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: March 17, 2009
    Assignee: Southwest Research Institute
    Inventors: Michael Eugene Pilcher, Jr., Brian Earl Campion, Ben Allen Abbott
  • Patent number: 7492307
    Abstract: This equipment is of the TCAS type. In order to improve its integrity and the reliability of its measurements, its computing unit is provided with a cross-checking function carrying out the comparison between two values of a same parameter, for example a relative distance with respect to an intruder, one of them generated by its own estimating means and the other communicated by another TCAS equipment installed on the intruding aircraft and generating a discordance alarm in the case of the observed difference exceeding a tolerance threshold. The computing unit is provided with fault locating means locating the aircraft whose TCAS is faulty when in the presence of several intruding aircraft, by examining the observed differences in pairs of values of a same parameter established for each intruding aircraft.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: February 17, 2009
    Assignee: Thales
    Inventor: François Coulmeau
  • Patent number: 7486226
    Abstract: The invention relates to a system, device, and method for using radar signals to measure the distance (h) to a surface from said device, the device comprising a transmitter and a transmitting antenna for transmitting radar signals, and a receiver and a receiving antenna for receiving a radar signal. The device may also comprise a first additional reflecting object separate from the receiving antenna, which additional reflector is designed so as to introduce a first predetermined alteration in radar signals upon reflection, with the device being equipped with means to differ between received signals with and without said predetermined alteration. The first predetermined alteration introduced by the first separate reflector can be, for example, a modulation shift or a shift in the polarization of the signal. In a typical embodiment the additional reflector is located close to the radar unit creating a double transition from radar unit to the surface.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: February 3, 2009
    Assignee: Rosemount Tank Radar AB
    Inventor: Olov Edvardsson
  • Patent number: 7479919
    Abstract: Systems and methods for alerting surrounding aircraft if a ground-based unit is a threat. One example system is located on a ground-based unit. The system includes a position sensor that senses position of the ground-based unit, a memory that stores predefined threat zone information, a transmitter that transmits a predefined transponder signal, and a processor in data communication with the position sensor, the memory, and the transmitter. The processor instructs the transmitter to transmit the transponder signal based on the threat zone information and the sensed position of the ground-based unit.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: January 20, 2009
    Assignee: Honeywell International Inc.
    Inventors: John J. Poe, Kevin J Conner
  • Patent number: 7479884
    Abstract: An improved system and method for monitoring objects, people, animals, or places uses a passive Modulating Reflector (MR) tag where an antenna is alternately short and open circuited according to a time-varying pattern by a modulating network thereby causing the reflective characteristics of the antenna to vary in accordance with the time-varying pattern. When an interrogator transmits an RF waveform that impinges on the antenna, the return signal reflecting off the antenna is modulated in accordance with the time-varying pattern allowing a remote receiver to demodulate information from the modulated return signal. The MR tag can be used with a wide variety of tag-interrogator configurations employing monostatic and/or bistatic radar techniques to allow monitoring, locating, and/or tracking of objects, people, animals, or place with which MR tags are associated.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 20, 2009
    Assignee: Cedar Ridge Research
    Inventor: Larry W. Fullerton
  • Patent number: 7471235
    Abstract: There are provided a differential processing unit which performs differential processing for a Mode S transponder transmission signal, an auto correlation arithmetic operation unit which performs an arithmetic operation of a degree of auto correlation between an increasing change rate and decreasing change rate of a power level in the signal which has been subjected to the differential processing, a pulse regeneration unit which regenerates a pulse based on the degree of auto correlation, which has been obtained by the auto correlation arithmetic operation processing, a pulse phase locked loop unit which performs gate processing and phase locked processing for the regenerated pulse, and a pulse decoding unit which decodes the Mode S transponder transmission signal based on the pulse which has been subjected to the gate processing and the phase locked processing.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: December 30, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisashi Ootomo, Yoshirou Aoki, Yoshinori Kuji
  • Patent number: 7460059
    Abstract: Interfering clutter in radar pulses received by an airborne radar system from a radar transponder can be suppressed by developing a representation of the incoming echo-voltage time-series that permits the clutter associated with predetermined parts of the time-series to be estimated. These estimates can be used to estimate and suppress the clutter associated with other parts of the time-series.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: December 2, 2008
    Assignee: Sandia Corporation
    Inventors: Richard C. Ormesher, Robert M. Axline
  • Patent number: 7372398
    Abstract: An apparatus for use in controlling a simulated target position in a millimeter wave, hardware-in-the-loop system includes a pair of horns and a conditioning circuit. The conditioning circuit is capable of generating a pair of output millimeter wave signals, each to be broadcast from a respective one of the horns, the output millimeter wave signals being out of phase by a predetermined amount, and capable of attenuating at least one of the output millimeter wave signals to control the position of the simulated target in a first and a second region. A method for use in controlling a simulated target position in a millimeter wave, hardware-in-the-loop system includes generating a pair of output millimeter wave signals that are out of phase by a predetermined amount; attenuating at least one of the output millimeter wave signals to control the position of the simulated target in a first and a second region; and broadcasting the millimeter wave signals.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: May 13, 2008
    Assignee: Lockheed Martin Corporation
    Inventor: Cole A. Chandler
  • Publication number: 20080088501
    Abstract: An apparatus for use in controlling a simulated target position in a millimeter wave, hardware-in-the-loop system includes a pair of horns and a conditioning circuit. The conditioning circuit is capable of generating a pair of output millimeter wave signals, each to be broadcast from a respective one of the horns, the output millimeter wave signals being out of phase by a predetermined amount, and capable of attenuating at least one of the output millimeter wave signals to control the position of the simulated target in a first and a second region. A method for use in controlling a simulated target position in a millimeter wave, hardware-in-the-loop system includes generating a pair of output millimeter wave signals that are out of phase by a predetermined amount; attenuating at least one of the output millimeter wave signals to control the position of the simulated target in a first and a second region; and broadcasting the millimeter wave signals.
    Type: Application
    Filed: January 17, 2006
    Publication date: April 17, 2008
    Inventor: Cole A. Chandler
  • Patent number: 7327306
    Abstract: 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 through the transponder aerial. The transponder device adds a known delay to the RF signal thereby producing an RF response for transmitting through the transponder aerial. A transmitter is connected to a first aerial for transmitting the RF signal through a first aerial. A receiver is connected to the first, a second and third aerials for receiving the RF response of the transponder device therethrough. A position calculator is associated to the transmitter and the receiver for calculating a position of the object as a function of the known delay and the time period between the emission of the RF signal and the reception of the RF response from the first, second and third aerials. A method is also provided.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: February 5, 2008
    Assignee: Orthosoft Inc.
    Inventor: Jean-Louis Laroche
  • Patent number: 7292822
    Abstract: An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation of a SAW input to the IDT and thereby lends itself to further application as a signal generator in a communication device. However, internal dimensions of IDTs are inversely proportional to operating frequency, such that high frequency IDTs present significant manufacturing difficulties. Fabrication of IDTs for high frequency applications is simplified by exploiting a harmonic frequency SAW generated by IDTs. An IDT may therefore be designed according to fundamental frequency internal dimension criteria but can operate at a multiple of the fundamental frequency, thereby providing much higher frequency operation than conventional SAW systems. Operation of a second harmonic SAW system at 2.4 GHz based on a fundamental frequency of 1.2 GHz is contemplated.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: November 6, 2007
    Assignee: Research In Motion Limited
    Inventors: Peter J. Edmonson, Colin K. Campbell
  • Patent number: 7218273
    Abstract: 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 are used to compensate for movement of the target and the platform. The antenna pointing direction is biased in a direction which provides a best signal quality, and the bias used to determine antenna boresight calibration factors. The boresight correction factors can be used for open loop pointing.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: May 15, 2007
    Assignee: L3 Communications Corp.
    Inventors: James B. Webster, Jr., LaMar K Timothy, Fred M. Strohacker
  • Patent number: 7209071
    Abstract: A system and method for performing distance measurement using wireless signals. A time of flight calculation is enabled by an interrogating device that transmits an interrogation signal to a responding device, which returns a synchronized signal back to the interrogating device. The wireless signals between the interrogating device and the receiving device have a harmonic relationship. In one embodiment, a time shift of a received signal relative to a transmitted interrogation signal is determined based on a comparison of a first reference point on a signal representative of the transmitted interrogation signal and a second reference point on a signal representative of the received signal.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: April 24, 2007
    Inventor: Steele Boring
  • Patent number: 7196654
    Abstract: 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 a pair of spatially separated receive feeds for receiving an electromagnetic signal having a second polarisation, wherein the first and second polarisations are different from one another, such that the transmit feed and receive feed at the rotating antenna are isolated from each other; and a coded modulated transponder receives transmit signals from the rotating antenna with the first polarization and transmits a receive signal to the rotating antenna with the second polarization.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: March 27, 2007
    Assignee: Guidance Navigation Limited
    Inventors: David John Edwards, Dominic Robert Pearce, Jan Grothusen
  • Patent number: 7164380
    Abstract: An interrogator with an antenna that allows information exchanges with multiple transponders in a shorter distance of communication, by securing an intensified and uniform electromagnetic energy concentrated on areas near antenna elements. The interrogator is furnished with a sleeve antenna that includes a monopole conductor of ¼ wavelength (free space wavelength) continuously connected to a core wire of a coaxial cable on one end thereof, and a feed point on the other end, in which the sleeve antenna is grounded at the feed point. The interrogator has a plurality of the transponders arrayed near the antenna, and a plurality of the antennas selected by RF signal selectors. The interrogator antenna allows movable body identification such as in a goods management system for identifying multiply arrayed goods.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: January 16, 2007
    Assignee: Hitachi, Ltd.
    Inventor: Takeshi Saito
  • Patent number: 7121502
    Abstract: A guidance system for guiding each of several projectiles toward a moving target has a platform having a radar system for illuminating the target with a radar signal. Each projectile has a receiver for receiving the radar signal reflected from the target, a transponder for replying to Global Positioning System (GPS) like timing signals from several timing signal sources, and a data link transceiver for establishing a bidirectional data link to the platform. The data link carries the measured frequency shift of the radar signal reflected from the target as measured by the projectile. A computer on the platform computes a relative position of each projectile with respect to the target from tracking the moving target using the radar system and the reply signal from the transponder on each projectile. The data link sends guidance commands from the platform to each projectile to guide the projectile to the target.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: October 17, 2006
    Assignee: Raytheon Company
    Inventors: Kapriel V. Krikorian, Robert A. Rosen
  • Patent number: 7119736
    Abstract: Separation determination systems for determining the separation between a base station and a transponder, whereby the base station includes an oscillating signal source, for generating a signal and a transmission device for broadcasting the signal. The transponder includes a receiving device, for receiving the signal from the base station, an oscillator, for generating a signal which is phase-coherent therewith and a transmission device for broadcasting the phase-coherent signal. The base station furthermore includes a receiver device, for receiving the phase-coherent signal from the transponder and a separation determination device for determining the distance between base station and transponder. The system and components may be improved whereby the oscillator in the transponder is energized with the received signal in order to generate a quasi-phase-coherent signal.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: October 10, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Patric Heide, Martin Nalezinski, Martin Vossiek, Leif Wiebking
  • Patent number: 7015856
    Abstract: A Mode-S transponder is provided for detecting synchronization phase reversal (SPR) signals. The transponder includes a receiver for receiving a Mode-S signal that contains a P6 pulse having a Mode-S data segment and an SPR signal therein. The transponder also includes a phase detector that detects a phase change between first and second states in the received Mode-S signal. The phase detector includes an SPR qualifier that determine whether, following a state change, the Mode-S signal remains at one of the first and second states for at least a predetermined minimum time sufficient to qualify as a detector enable signal.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: March 21, 2006
    Assignee: Garmin International, Inc.
    Inventor: Timothy L. Johnson
  • Patent number: 6985103
    Abstract: A passive airborne mounted collision warning system suitable for light aircraft that enables an observer aircraft to determine the position of a nearby transponder-equipped target aircraft. The transponder-equipped target aircraft transmits replies responsive to interrogation signals from rotating secondary surveillance radars (SSR). In an embodiment of the invention, position of the target aircraft is determined based on the known position of the observer aircraft obtained e.g. via satellite navigation means such as GPS, the position of the SSR, and the bearing of the target aircraft measured by a direction finding antenna. The direction-finding antenna elements and the GPS receiver components are included in a device that is externally mounted on the observer aircraft. The data from the device is connected to a portable computer for processing and presentation to the pilot to alert him of the position of the target aircraft for avoiding collisions.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: January 10, 2006
    Assignee: Navaero AB
    Inventors: Stefan Ridderheim, Bjorn Lindmark, Hans Nystrom
  • Patent number: 6861971
    Abstract: A transceiver or transponder particularly for synthetic aperture radar, or SAR, systems, operating in a frequency band having a central frequency, the transponder comprising a receiver (1) and a transmitter (2) both thermally stable and made by microstrip technology, the receiver (1) and the transmitter (2) being adapted to receive and to transmit, respectively, an electromagnetic wave provided with at least one linear polarisation, the receiver (1) being connected to the transmitter (2) by amplifier means comprising an amplifier unit (5) for each linear polarisation of the wave received by the receiver (1), each amplifier unit (5) including at least two amplifier stages (7, 9, 11) cascade arranged along a single microstrip and interconnected to one another and to an input and to an output of the corresponding amplifier unit (5) by means of coupling or matching stages (6, 8, 10, 12), the output signal of each amplifier unit (5) having substantially the same frequency as the input signal thereto, the amplifier
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: March 1, 2005
    Assignee: Tes Teleinformatica E Sistemi s.r.l.
    Inventors: Pasquale Russo, Alessandro Rosa, Annamria D'Ippolito
  • Patent number: 6842138
    Abstract: A target designation system for indicating a target to be destroyed by remotely guided ordnance comprising a receiver arranged to produce a receiver output signal in response to an incident electromagnetic signal from an attack aircraft. An auto-switch is connected to the receiver and arranged to produce a power signal in response to the receiver output signal. A transmitter is connected to the auto-switch to be activated by the power signal. When activated, the transmitter transmits a homing signal that indicates its location or the location of the target.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: January 11, 2005
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: James A. Wilkinson
  • Patent number: 6825794
    Abstract: SAW devices such as interdigital transducers (IDTs) have been widely used in RADAR applications and as filters. An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation of a SAW input to the IDT and thereby lends itself to further application as a signal generator in a communication device. However, internal dimensions of IDTs are inversely proportional to operating frequency, such that high frequency IDTs present significant manufacturing difficulties. Fabrication of IDTs for high frequency applications is simplified by exploiting a harmonic frequency SAW generated by IDTs. An IDT may therefore be designed according to fundamental frequency internal dimension criteria but can operate at a multiple of the fundamental frequency, thereby providing much higher frequency operation than conventional SAW systems.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: November 30, 2004
    Assignee: Research In Motion Limited
    Inventors: Peter J. Edmonson, Colin K. Campbell