Patents Examined by Theodore M. Blum
  • Patent number: 6611228
    Abstract: A carrier phase-based relative positioning apparatus comprises a plurality of antennas of which at least one is installed on a mobile unit. The apparatus determines the position of each antenna other than one antenna used as a reference antenna relative to the reference antenna by receiving radio signals transmitted from a plurality of position-fixing satellites with the multiple antennas, observing a single difference phase or a double difference phase, and calculating an integer ambiguity of the single difference phase or the double difference phase. The apparatus judges that the integer ambiguity has been incorrectly determined if the position of any of the antennas relative to the reference antenna (or the angle of a flat plane formed by those two antennas) falls out of a preset range in which the relative position (the angle of the flat plane) falls under normal conditions.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: August 26, 2003
    Assignee: Furuno Electric Company, Limited
    Inventors: Hiroyuki Toda, Sadao Sato, Masaru Fukuda, Kaoru Nakayama
  • Patent number: 6603426
    Abstract: The present invention is a system for providing GPS users with a high level of confidence in the integrity and accuracy of received GPS signals. The system provides a means for each GPS satellite itself to verify the accuracy and/or integrity of its own operations by calculations and processing internal to the GPS satellite and by crosslink communications with other GPS satellites in the GPS constellation. After a GPS satellite verifies the accuracy and/or integrity of its own signals, the GPS satellite transmits an integrity message to all GPS users in view of the satellite. The integrity message can alert GPS users to a loss of integrity or accuracy in the GPS signals. Alternatively, the integrity message can contain information to correct errors in the GPS signals. The integrity message can be incorporated into the existing GPS navigation message transmitted by GPS satellites, or the integrity message can be transmitted over a separate channel such as the planned L5 band channel.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: August 5, 2003
    Assignee: Lockheed Martin Corporation
    Inventor: Ronald H. Clark
  • Patent number: 6600446
    Abstract: A cascadable beamformer with the capability to cooperate with one or more cascadable beamformers to build a customized beamforming apparatus. The architecture supports a cascadable beamformer with a covariance estimate logic that supports cascading multiple devices together to support different numbers of input channels, a weighted sum logic that supports cascading multiple devices together to support different numbers of input channels, and a weighted sum logic that supports cascading multiple devices together to support different numbers of output beams.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: July 29, 2003
    Assignee: Lockheed Martin Corporation
    Inventor: Thomas A. Moch
  • Patent number: 6597310
    Abstract: A collection/delivery work support system which can eliminate erroneous delivery of goods, missing delivery and missing collection in collection/delivery service to greatly improve the efficiency of collection of goods. A collection/delivery navigation system for determining and indicating a route for delivery and collection of goods and managing collection and delivery conditions has an electronic slip which stores information described in a slip of a commodity and has a function of transmitting the stored information in response to an external request for information, and a navigation unit for indicating a route for collection and delivery of goods and collection and delivery conditions.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: July 22, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Masakazu Itoh, Manabu Miyatake
  • Patent number: 6593879
    Abstract: In the absence of a gyroscope, the attitude and attitude rate of a receiver can be determined using signals received by antennae on the receiver. Based on the signals received by the antennae, the Doppler difference between the signals is calculated. The Doppler difference may then be used to determine the attitude rate. With signals received from two signal sources by three antennae pairs, the three-dimensional attitude rate is determined.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: July 15, 2003
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Charles E. Campbell
  • Patent number: 6593881
    Abstract: A phased array antenna includes a plurality of phased array antenna modules and associated antenna elements. Further, at least one of the phased array antenna modules may also include a temperature sensor for measuring a temperature of the at least one phased array antenna module. More particularly, the temperature sensor may include a capacitor and a circuit element coupled in series with the capacitor having a resistance that varies with temperature. Additionally, the at least one phased array antenna module may further include a module controller for charging/discharging the capacitor through the circuit element, measuring a charging/discharging time required to charge/discharge the capacitor to a predetermined threshold, and determining the temperature of the at least one phased array antenna module based upon the charging/discharging time.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: July 15, 2003
    Assignee: Harris Corporation
    Inventors: David Kenyon Vail, Frank J. Tabor, Daniel P. Blom, Stephen S. Wilson
  • Patent number: 6593877
    Abstract: A method of determining the position of a transmitting beacon transmitting a signal to certain satellites in a constellation of satellites, which satellites in turn retransmit retransmitted signals to at least one detection ground station, wherein each of said ground stations is provided with at least one antenna whose directional characteristics do not make it possible to identify which satellite retransmitted any given retransmitted signal, and wherein the method implements the following steps: a) computing position for all combinations associating signals with satellites that might correspond to retransmission of transmitted signals; b) computing the position of the beacon for at least some of the satellite combinations, using the least squares method; and c) determining the combination which presents the smallest computation residue by the least squares method, the position of the transmitting beacon corresponding to this combination then being considered to be the position of the transmitting beacon.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: July 15, 2003
    Assignee: Agence Spatiale Europeenne
    Inventors: Bart Peeters, Jörg Herbert Hahn, Giuliano Gatti, Igor Stojkovic, Boudewijn Ambrosius, Hans Van der Marel
  • Patent number: 6590534
    Abstract: A method of using radio frequency communications is taught for location of an automobile for the convenience of the owner. In addition, a method of using magnetic dead reckoning is taught. Methods and apparatus using cellular phones are taught.
    Type: Grant
    Filed: December 16, 2000
    Date of Patent: July 8, 2003
    Assignee: Kroll Family Trust
    Inventors: Mark W. Kroll, Karl J. F. Kroll
  • Patent number: 6590537
    Abstract: The present invention provides a method for the real-time location of a multiplicity of Mobile Units by correlating a commanded radio signal from the specific Mobile Units received by multiple fixed antennae. The Mobile Units are equipped with a transceiver that is activated by an encoded broadcast and responds with a burst transmission on a separate frequency that is received by several well-surveyed antennae at slightly different times due to the variable distance of the Mobile Units to the Fixed Receiver antennae. The location of a Mobile Unit is determined by resolving the burst transmission time delay differences from at least four fixed antennae to eliminate the common system unknowns.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: July 8, 2003
    Inventor: Fm Bay
  • Patent number: 6590524
    Abstract: Disclosed is a method which synchronizes a slave time with a master time. The master time is derived from a received signal. The master time is compared to the slave time to detect any offset of the slave time relative to the master time. If an offset is detected, the slave time is adjusted to correct the offset. Also disclosed is a method of synchronizing a pseudolite transmitter time with GNSS time. The transmitter time is compared to GNSS time to detect any offset of the transmitter time. The transmitter time is adjusted to correct the offset if an offset is detected. Also disclosed is an improved pseudolite. The pseudolite has a pseudolite transmitter and GNSS receiver. The pseudolite transmitter time is synchronized with GNSS time.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: July 8, 2003
    Assignee: Rockwell Collins, Inc.
    Inventors: Michael G. Farley, Jeffrey J. Jorgensen, Jeffrey L. Tuohino, Susan R. Schellenberg, Wilmer A. Mickelson, Mitchell A. Corcoran
  • Patent number: 6590535
    Abstract: A wireless tracking system consists of a wireless target including a wireless communication system for transmitting a data packet over a communication path, and a locating station for determining a position of the target. The data packet transmitted from the target includes an identification code uniquely associated with the target. The locating station includes a configurable directional antenna, a communication interval processing system, a direction processing system, and a position processing system. The communication interval processing system is in communication with the directional antenna and determines the transmission interval of the transmitted data packet over the communication path. The direction processing system determines the transmission angle of the communication path, and is in communication with the directional antenna for controlling the configuration of the directional antenna so as to facilitate the determination of the transmission angle.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: July 8, 2003
    Assignee: Stelx Inc.
    Inventors: Brian De Champlain, Frank Gerlach
  • Patent number: 6587077
    Abstract: A phased array antenna may include a substrate and a plurality of phased array antenna elements carried by the substrate, and a plurality of element controllers connected to the phased array antenna elements. Each element controller may be switchable between inactive and active data receiving states. The phased array antenna may further include a plurality of subarray controllers and a plurality of data buses. Each data bus may connect a respective subarray controller to respective columns and rows of element controllers.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: July 1, 2003
    Assignee: Harris Corporation
    Inventors: David Kenyon Vail, Frank J. Tabor, Daniel P. Blom, Stephen S. Wilson
  • Patent number: 6587080
    Abstract: A wireless tracking system consists of a wireless target including a wireless communication system for transmitting a data packet over a communication path, and a locating station for determining a position of the target. The data packet transmitted from the target includes an identification code uniquely associated with the target. The locating station includes a configurable directional antenna, a communication interval processing system, a direction processing system, and a position processing system. The communication interval processing system is in communication with the directional antenna and determines the transmission interval of the transmitted data packet over the communication path. The direction processing system determines the transmission angle of the communication path, and is in communication with the directional antenna for controlling the configuration of the directional antenna so as to facilitate the determination of the transmission angle.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: July 1, 2003
    Assignee: Centraxx Corp.
    Inventors: Brian De Champlain, Frank Gerlach
  • Patent number: 6583757
    Abstract: A method and apparatus for measuring time related to satellite data messages which are used with satellite positioning systems (SPS). In one method, a first record of at least a portion of a satellite data message is received at an entity, which is typically a basestation. The first record is compared with a second record of the satellite data message, where the first record and the second record overlap at least partially in time. Then a time is determined from this comparison, and this time indicates when the first record (or the source from which the first record was obtained) was received at a remote entity which is typically a mobile SPS receiver. Various other methods of the invention are described and various apparatuses of the invention are also described. The methods and apparatuses measure time of day using SPS signals without reading the satellite data messages which are transmitted as data within these signals.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: June 24, 2003
    Assignee: SnapTrack, Inc.
    Inventor: Norman F. Krasner
  • Patent number: 6583760
    Abstract: Systems and methods for providing antenna beams having reduced grating and side lobes when steered off of the antenna broadside are disclosed. According to the present invention an arrangement of antenna elements suitable for use in generating antenna beams steered at greater angles off of the antenna broadside is utilized with a beam feed network consistent with the antenna beams being steered at the greater angles and reduced antenna element spacing to provide the reduced grating and side lobes. A preferred embodiment utilizes a 2n+1 Butler matrix coupled to 2n+1 antenna columns spaced according to the present invention to provide 2n antenna beams. Preferred embodiments provide a dual mode antenna system in which antenna elements of a first mode are interspersed with antenna elements of a second mode.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: June 24, 2003
    Assignee: Metawave Communications Corporation
    Inventors: Gary A. Martek, Blaine J. Smith
  • Patent number: 6580391
    Abstract: An antenna alignment apparatus and alignment method is used to effectively position an antenna used in a satellite communication system on the satellite orbital arc, and to ensure that a proper antenna polarization is achieved during installation or alignment of a remote station antenna. The apparatus includes a secondary receiving device mounted on the feed arm of the antenna at a specified distance from the primary receiving device located on the primary plane of the antenna. An antenna using this system and method may be properly aligned on the orbital arc using only simple receiving equipment.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: June 17, 2003
    Assignee: Hughes Electronics Corporation
    Inventors: Walter Kepley, Paul Gaske, Michael Middeke
  • Patent number: 6577274
    Abstract: According to one embodiment, the invention discloses a method comprising determining a position of a mobile device; and controlling access to said mobile device based on said position. According to another embodiment of the invention there is provided a mobile device comprising a positioning mechanism to determine a position a mobile device; and a controlling mechanism to control access to said mobile device based on said position.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: June 10, 2003
    Assignee: Intel Corporation
    Inventor: Sundeep M. Bajikar
  • Patent number: 6573864
    Abstract: A receiver is provided which can avoid demodulation performance from deteriorating due to changes in circuit constants caused by changes over time and temperature-dependent changes, prevent an increase in the receiver size, and realize a cost reduction. A switch control section is provided to perform control such that an input terminal of one of a plurality of phase varying circuits is selectively connected through a first switch circuit to any of an output terminal of an RF amplifier and a local signal output terminal of a local signal generating circuit, whereby the one phase varying circuit serves as a calibration circuit in the calibration processing that is executed in the non-reception mode. Also, the output terminal of the one phase varying circuit is selectively connected through a second switch circuit or a third switch circuit to any of one input terminal of a signal combiner and a first input terminal of a multi-port junction circuit in a multi-port direct conversion demodulating section.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: June 3, 2003
    Assignee: Sony Corporation
    Inventors: Yukitoshi Sanada, Masayoshi Abe, Ryuji Kohno
  • Patent number: 6570532
    Abstract: A support request processing system using GPS data for locating a person requesting a support. The system is supplemented with a mobile terminal to be carried by the person separately from a GPS terminal left in the vehicle. The mobile terminal transmits a support request signal by way of a radio communication to the GPS terminal which responds to receive the GPS data from the GPS satellite and transmits the data to a message center. Upon receiving the GPS data, the message center calculates the position of the GPS terminal and notifies a warning message for rescue of the person. With the inclusion of the mobile terminal, the system can estimate the location of the person around the GPS terminal or the vehicle even when the person is within buildings where the GPS data from the GPS satellites is not available.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: May 27, 2003
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Toshiro Mise, Kiyotaka Takehara, Akira Oya, Kazuhiro Honda
  • Patent number: 6570537
    Abstract: The present invention provides a hyper-scanning digital beam former, which includes a plurality of digitizing units (N) having respective inputs for receiving a respective signal from a plurality of elements of an antenna. The digitizing units are operably configured to digitally convert the element antenna signals at a first clock rate; a summing circuit having an input for receiving the digital signals from respective outputs of the digitizing units and operably configured to generate a plurality of output signals (M) by summing ones of the digital signals; and a channel processor having an input for receiving the M output signals and operably configured to process the M output signals at a second clock rate in which the second clock rate is at least M times faster than the first clock rate.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: May 27, 2003
    Assignee: Lockheed Martin Corporation
    Inventor: Thomas L. Frey, Jr.