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| Number | Title | Issue Date |
| 8106815 | System for positioning a terrestrial user Disclosed is a system for positioning a terrestrial user. The system includes navigation satellites placed in medium altitude orbits, management satellites placed in high orbits, able to manage the navigation satellites and communicate with the Earth. The management... | 01/31/2012 |
| 7432852 | Method of synchronizing base stations of a terrestrial cellular communication network The present invention relates to a method of synchronizing base stations of a terrestrial cellular communication system using a satellite component. ... | 10/07/2008 |
| 7428405 | Automatic operation system and method for automating satellite control operation and satellite ground control system using the same Provided are an automatic operation system for automating satellite control operation, a method thereof, and an automatic satellite ground control system using the same. The object of the present research is to provide an automatic operation system that can reduce o... | 09/23/2008 |
| 7391677 | Positioning device, positioning method, and timepiece having the positioning device A positioning device has a reception unit for receiving navigation messages transmitted continuously in a time series from positioning information satellites orbiting the Earth and determines the location of the positioning device based on the navigation messages re... | 06/24/2008 |
| 7369830 | Monolithic GPS RF front end integrated circuit A highly integrated GPS RF Front End which uses a single conversion stage employs an image rejection mixer stage to eliminate the need for an image reject RF bandpass filter. Also a relatively high sample rate A/D is employed which allows a timeless monolitic IF Fil... | 05/06/2008 |
| 7369847 | Fixed cell communication system with reduced interference A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same communication resource is provided. Preferably, cells having the sam... | 05/06/2008 |
| 7336189 | Human locator system and method A human locator system and method conducts long-range locating with components or steps that are not readily visible on the person of the lost human, and that is fully independent of external communications and power systems. The human subject is provided with a bea... | 02/26/2008 |
| 7333053 | Signal path system and method for a ranging signal receiver Methods and receivers determine a range from radio frequency ranging signals at multiple frequencies. The number of dedicated RF sections and correlation processing power is reduced by multiplexing signals from a sub-set of frequencies onto a common path. The common... | 02/19/2008 |
| 7327698 | Method and system for providing satellite communications using on-orbit payload configuration and reconfiguration A system for providing high frequency data communications in a satellite-based communications network includes a plurality of communications satellites each having uplink and downlink antennas capable of receiving and transmitting a plurality of signals. Each of sai... | 02/05/2008 |
| 7317895 | Method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit A method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit. The method comprises dividing the coverage area of the satellite communication system into one or several geographical areas; positioning one or several tim... | 01/08/2008 |
| 7301992 | Multipath processing for GPS receivers A GPS receiver system determines the presence of trackable signals at code delays less than the prompt delay being tracked for a particular, signal and changes the prompt delay to correspond to the smallest code delay having a trackable signal. Trackable signals at ... | 11/27/2007 |
| 7286444 | Method and system for synchronizing separated clocks Methods and systems for synchronizing a first clock with a second clock, wherein the clocks are separated, are disclosed. A representative system, among others, includes a correlated particle emitter that emits a first particle stream and a second particle stream. P... | 10/23/2007 |
| 7277673 | Virtually geostationary satellite array with optimized parameters A plurality of satellites are placed into a virtually geosynchronous orbit, in which a first part of the orbit, that is near apogee, has a similar movement to the rotation of the earth, and therefore the orbit appears virtually stationary relative to the earth. Diff... | 10/02/2007 |
| 7246011 | Combined parallel and sequential detection for GPS signal acquisition A two part signal acquisition process includes a parallel signal detection process and signal verification/false alarm rejection process. A massively parallel architecture of acquisition correlators search a large region of the time-frequency uncertainty during the ... | 07/17/2007 |
| 7209753 | Method to control the update frequency of a positioning device by a mobile terminal A mobile radiocommunications terminal contains or is operatively connected to a position estimator, such as a GPS receiver. The mobile terminal stores at least one reference position. The mobile terminal updates its position at a frequency that is a function of its ... | 04/24/2007 |
| 7200414 | Client-aiding with cellphones in a 150-KM radius area A cellphone system comprises a GPS reference station located with a telephone cell site. Such GPS reference station tracks the GPS satellites visible to its local area and estimates the Doppler for each such GPS satellite. The system also includes mobile GPS receive... | 04/03/2007 |
| 7197305 | Apparatus for reducing auto-correlation or cross-correlation in weak CDMA signals The present invention discloses methods, apparatuses, and systems for eliminating auto- and cross-correlation in weak signal CDMA systems, such as GPS systems. The invention uses parallel data paths that allow standard correlation of signals in parallel with verific... | 03/27/2007 |
| 7171158 | Satellite communication system using linear cell tracking An improved satellite communication device and system are provided. The satellite communication device uses yaw or roll-yaw steering to linearize angular track of uplink cells; one-dimensional linear “ratcheting” in an uplink antenna to maintain resource allocat... | 01/30/2007 |
| 7155183 | Method and apparatus for adjusting reference oscillator frequency in a mobile wireless device A method and apparatus for using a conventional oscillator in a cellular telephone transceiver as a source of a reference signal for a GPS receiver. In one embodiment, the method comprises using a voltage-controlled oscillator (“VCXO”) within a cellular telephon... | 12/26/2006 |
| 7142154 | Time and frequency synchronizations of equipment at different locations Method and apparatus for providing accurately synchronized timing signals at mutually distant locations employs a GPS or similar receiver at each location. These receivers are interconnected by a communications network, and exchange data over the network to agree a ... | 11/28/2006 |
| 7136640 | Method and apparatus for selectively operating satellites in tundra orbits A satellite system provides geosynchronous satellites in tundra orbits in respective elliptical orbital planes separated by 120 degrees. The satellites traverse a common figure-eight ground track comprising northern and southern loops. The satellites are controllabl... | 11/14/2006 |
| 7130396 | Medical monitoring system having multiple communications channels A medical monitoring system has a sensor system including a sensor associated with a patient and a remote monitoring unit. The remote monitoring unit includes a microprocessor in communication with the sensor system, and a portable-monitoring unit transceiver system... | 10/31/2006 |
| 7123186 | Controlling solution latency in a global navigation satellite receiver A satellite positioning device is disclosed for determining position based on received satellite navigation signals and a received non-satellite signal. A local clock controls the epoch period of a satellite signal processor. Correction signals are applied to the lo... | 10/17/2006 |
| 7099373 | Noise shaping technique for spread spectrum communications A spread spectrum noise shaper uses a modulation technique to achieve a greater signal-to-noise or signal-to-interference ratio (SNR or SIR). The technique doubles the system SIR, in principle. This doubling yields a doubling in system capacity. SNR is increased by ... | 08/29/2006 |
| 7065348 | Communication system for providing information on position of communication party A method for providing location information. In the method a demand of providing location information of a terminal of a second user is accepted from a terminal of a first user. An approval of the location information provided to a terminal of the second user is req... | 06/20/2006 |
| 7051980 | Efficient orbit sparing system for space vehicle constellations A sparing system for space vehicle constellations. A plurality of space vehicles arranged in at least one mission orbit plane. The number of space vehicles is at least one greater than a minimum number necessary to provide at least a minimum level of service necessa... | 05/30/2006 |
| 7031272 | Satellite direct radio broadcast system A satellite direct audio broadcast system includes a plurality of fixed-rate, uniform, frequency division multiple access (“FDMA”) uplinks and a time division multiplexed (“TDM”) downlink. Source audio channels may be divided among and transmitted through a ... | 04/18/2006 |
| 7031653 | Switch matrix for satellite payloads with multiple uplink beams and on-board signal processing A method and apparatus for switching signals through a switch matrix are disclosed. The apparatus comprises an input module and an output module. The input module has a plurality of inputs typically equal to a number of cells in a reuse pattern, and the inputs recei... | 04/18/2006 |
| 7006838 | System and method for locating sources of unknown wireless radio signals A system and method for determining the location of a source (target device) of a wireless radio signal of an unknown or arbitrary type for which a signal correlator is not known or available. The target device's signal is received at a plurality of known locations ... | 02/28/2006 |
| 7002468 | Controlling access to a medical monitoring system Access to a medical monitoring system, which includes a patient-portable monitoring device and an associated monitoring service at a central unit, is controlled by inputting a set of identification data elements into a medical monitoring device, which then establish... | 02/21/2006 |
| 6975600 | Multimode transmission system using TDMA A multimode transmission system using TDMA provides a plurality of satellite services to a ground station terminal. These services include timing beacon synchronization, multi-cast/broadcast data service, calibration data, and point-to-point data service. The multim... | 12/13/2005 |
| 6957107 | Method and apparatus for monitoring and communicating with an implanted medical device A method and apparatus for communicating with and monitoring the operation of a device implanted within a patient. A transceiver capable of being implanted within a patient provides a communication interface between an implanted medical device and a monitor external... | 10/18/2005 |
| 6954613 | Fixed satellite constellation system employing non-geostationary satellites in sub-geosynchronous elliptical orbits with common ground tracks Shows orbit-constellation of satellites that appears virtually geosynchronous. ... | 10/11/2005 |
| 6944450 | Communications system This disclosure provides a communications system using a span-loaded flying wing, traveling at relatively slow speeds, that can remain airborne for long periods of time. The communications system uses the airplane as a long term high altitude platform that can serve... | 09/13/2005 |
| 6940403 | Reprogrammable remote sensor monitoring system An automated, real-time, reprogrammable monitoring and control system for portable, remote sensors and subjects includes one or more portable monitoring units, each of the portable monitoring units having a sensor, a location-determining device, and a sensor interfa... | 09/06/2005 |
| 6917644 | Spread spectrum receiver with multi-path correction A spread spectrum receiver uses a comparison of the magnitude of the code correlation amplitudes at equal power at a one chip spacing to the magnitude at a central position there between to determine if multipath interference is present. The lead or lag error from c... | 07/12/2005 |
| 6853894 | Global network based vehicle safety and security telematics The present invention relates to a global network based vehicle safety and security system and method. In this regard, a global network based data processing resource can wirelessly data communicate with an in-vehicle device to control and monitor vehicle safety and... | 02/08/2005 |
| 6824107 | Artificial satellite with an orbit having a long staying time in a zenith direction, an orbit control method and a communication system therewith A transmission or communication system, wherein plural individual elliptical orbits are so defined that an individual right ascension of a north-bound node is established with a designated angle. An artificial satellite is travels on a respective ones of the plural ... | 11/30/2004 |
| 6795687 | Elliptical satellite system emulating characteristics of geosynchronous satellites during the apogee portion of an elliptical orbit An array of satellites which is virtually geosynchronous. Each satellite is in an elliptical orbit. The apogee portion of each elliptical orbit is over one of the regions of interest. Each satellite is virtually geosynchronous during its apogee portion, over the reg... | 09/21/2004 |
| 6795771 | Method and apparatus for correlating a satellite signal with a reference code A method and apparatus for correlating a satellite signal with a reference code is described. In an example, samples of a satellite signal having a repeating code are received. At least one fast convolution between the samples and the pseudorandom reference code is ... | 09/21/2004 |
