Matches 351 - 400 out of 789 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
6166688 Data processing system and method for disabling a portable computer outside an authorized area  
A data processing system and method are disclosed for disabling a portable computer in response to the portable computer being moved outside of an authorized area of use. An authorized,...
6166656 Emergency assistance system for automobile accidents  
An emergency assistance system for summoning first-aid assistance of persons and vehicles within the vicinity of a person involved in an automobile accident, while also making an emergency call to...
6166627 Mobile detection and alert system  
A mobile detection and alert vehicle tracking and security system for an individual vehicle as well as a plurality of individual vehicles in a given security area. The mobile detection and alert...
6166626 Clandestine missing vehicle location reporting using cellular channels  
Apparatus and method for a location determination and reporting (LDR) system for clandestinely determining and reporting a missing vehicle present location. The vehicle is equipped with a handheld...
6163298 Route guidance apparatus  
A system (UTMS) is disclosed for sending guiding destination data to a control center and calculating a recommended route at the control center while taking traffic conditions into account and...
6161018 Method and system for estimating a subscriber's location in a wireless communication system service area  
At a receiver location in a wireless communication system service area, a set of characteristics that describe a received ray of a subscriber signal is measured. In a model of the wireless...
6160511 Method and apparatus for locating a remote unit within a communication system  
A base station (101) calculates a location of a remote unit (113) using a first location technique. The first location technique is a single-site estimation of a PN offset for the remote unit (PN...
6154657 Smart subdivision of base station candidates for position location accuracy  
In a cellular telephone system of the type having the capability of making measurements useful in determining the location of a mobile station, at least one such measurement is made. The...
6148212 System and method for cellular control of automobile electrical systems  
A telecommunications system and method is disclosed for instructing a device interfaced with a vehicle's electrical system to activate or deactivate specific electrical devices, using the cellular...
6144918 Navigation data processing with filtering for refined position determination  
Consistent with one embodiment of the invention, a GPS signal processing system uses a behavior observer to monitor user dynamics and to aid a time-varying-gain filter arranged to perform...
6140956 Vehicle tracking and security system incorporating simultaneous voice and data communication  
A system which tracks and monitors a vehicle by utilizing cellular communication componentry and global positioning system componentry is disclosed. The system provides for simultaneous and...
6133876 System and method for position determination by impulse radio  
A system and a method for position determination by impulse radio using a first transceiver having a first clock providing a first reference signal and a second transceiver placed spaced from the...
6127975 Single station communications localization system  
The present invention combines the measured characteristics of a radio signal in a communications environment with collateral information to produce an accurate and economical way to locate a...
6127945 Mobile personal navigator  
A personal navigation device and method for providing location information. In one embodiment, the present invention is comprised of a portable hand-held unit. The portable unit contains a...
6125326 Navigation system  
A combination of a main navigation apparatus 2 which is fixed to the vehicle and a sub-navigation apparatus 3 which is detachable from the vehicle. When the sub-navigation apparatus 3 is attached,...
6121927 Determination of terminal location in a radio system  
A radio signal travels over a radio channel in the form of multipath propagation, whereby a signal received by the base station and transmitted by the terminal equipment is composed of multipath...
6114995 Computer-implemented method and apparatus for autonomous position determination using magnetic field data  
A computer-implemented method and apparatus for determining position of a vehicle within 100 km autonomously from magnetic field measurements and attitude data without a priori knowledge of...
6114975 Method of air navigation assistance for guiding a moving vehicle towards a moving target  
A method of air navigation for guiding a moving vehicle toward a moving target. Both the moving vehicle and the moving target use satellite positioning receivers. Instead of transmitting the...
6108558 Method for calculating a location of a remote Unit utilizing observed time difference (OTD) and real time difference (RTD) measurements.  
Base stations (101, 103, and 105) transmit, and a remote unit (117) receives a radio frequency (RF) location signal. The remote unit (117) then computes an observed-time-difference (OTD) for each...
6108555 Enchanced time difference localization system  
A method and apparatus for locating a mobile radio communications transceiver in a cellular-telephone or cellular-like communications system use a simplified system for passive monitoring of the...
6104978 GPS-based centralized tracking system with reduced energy consumption  
A communication method reduces both the asset energy requirements and communication channel occupancy in a reduced order GPS asset tracking system. The asset is provided with an indication of its...
6104339 All-terrain error correction  
The real time differential satellite navigational system integrated with the tilt measurement system is disclosed. The integrated positioning system allows one to perform the real time precise...
6101390 Calibration table generation for wireless location determination  
A system and method is provided for processing a calibration table used in a wireless location finding system. The initial calibration table data comprises points partitioned into routes followed...
6097336 Method for improving the accuracy of a wireless location system  
A method for locating a mobile transmitter comprises the steps of (a) making a first estimate of the location of the mobile transmitter on the basis of a first transmission from the mobile...
6094168 Position determining system  
The invention relates to a position determining system, for receiving digital telephone signals transmitted by a number of transmission sources BTS. The system has a pair of receiving stations, CBU...
6094164 Integrated radio direction finding and GPS receiver tracking system  
An integrated radio direction finding and GPS receiver tracking system. In one embodiment, a transmitter device is attached to an object to be located. The transmitter device transmits a signal....
6091362 Bandwidth synthesis for wireless location system  
A wireless location system receives signals transmitted by wireless telephones at a plurality of signal collection sites. To improve the accuracy of the location information, the system synthesizes...
6088650 Vehicle tracker, mileage-time monitor and calibrator  
A system for monitoring location and speed of a vehicle, using a location determination system such as GPS, GLONASS or LORAN and an optional odometer or speedometer, for determining and recording...
6087987 Method of locating an enabling component containing a transponder, and a motor vehicle with a corresponding locator  
The system allows locating an enabling component of a motor vehicle. The enabling component, provided with a chip, is for example a smart card or an electronic key. The enabling component is...
6085090 Autonomous interrogatable information and position device  
An autonomous interrogatable information and position device combines the functionality of a satellite communications device capable of sending and receiving voice and digital data messages, a...
6084547 Enhanced position calculation  
The invention discloses several computation and control techniques which use historic information as well as other cues in order to enhance the accuracy of a radio position fix. These computational...
6084510 Danger warning and emergency response system and method  
Surveillance platforms in airborne craft (8,10), land based vehicles (12), vessels at sea or fixed structures (14) detect dangers using conventional scanners and transmit information signals...
6081231 Manufacturing installation and processing operations  
The absolute position of a vehicle (V) transporting articles between sites (SS) at an installation, e.g. stations of a steel works, is determined by satellite navigation signal and logged on a CPU...
6075458 Locator device  
A locator apparatus includes a receiver for receiving location information indicative of a location of the receiver. A memory is coupled to the receiver and stores the location information. A...
6070079 Positioning apparatus used in a cellular communication system and capable of carrying out a positioning with a high accuracy in urban area  
A positioning apparatus is provided in a cellular base station for positioning a portable terminal in a cell covered by the cellular base station. The positioning apparatus has a base position...
6069570 Asset location system  
An asset location system includes a pager, a control processor, a GPS receiver and a cell phone. During normal operation, the equipment on board the tracked asset is in a low power or sleep mode....
6064339 Subspace signature matching for location ambiguity resolution in wireless communication systems  
A method and apparatus reduces the ambiguities in the determination of cellular telephone locations in a location finding system based on the use of multipath signals. A location finding base...
6061021 Locatable mobile cellular telephony terminal  
The mobile cellular telephony terminal includes a radio transmitter/receiver (1) for communicating with base stations of a cellular network, measuring the Doppler velocity of the transmissions...
6052068 Vehicle identification system  
A vehicle identification system for identifying motor vehicles in a group of vehicles at distances in excess of 200 feet is disclosed. The system includes an interrogator for directionally...
6046687 Clandsetine location reporting for missing vehicles  
Apparatus and method for a location determination and reporting (LDR) system for clandestinely or surreptitiously determining and reporting a missing vehicle present location. The vehicle may be...
6040801 Low duty cycle navigation system  
This invention relates to radio navigation systems and is particularly dited to means for transmitting range and azimuthal information to selected receivers only. More specifically this invention...
6040800 Systems and methods for locating remote terminals in radiocommunication systems  
Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide...
6034646 Information transmission device and method for systems using radiating waveguides  
In an information transmission device and method for systems using radiating waveguides along which a mobile travels, an unmodulated carrier wave is injected into the radiating waveguide. Some of...
6034635 Method for using only two base stations for determining the position of a mobile subscriber in a CDMA cellular telephone system  
A method for determining the position of a mobile station within a cellular telephone system having first and second base stations. A round trip signal propagation time between the first base...
6031490 Method and system for determining the position of mobile radio terminals  
The disclosure describes a novel Time Difference of Arrival (TDOA) method and system for determining the position of a first mobile radio terminal within an associated mobile radio system, which is...
6028553 Method for dynamic route recommendation  
Using a mobile radiotelephone network and a traffic routing and information central as well as a navigation apparatus and a mobile radiotelephone in the vehicle, the user requests a current route...
6028537 Vehicle communication and remote control system  
The vehicle communication and control system of the present invention includes a transceiver for sending and receiving RF signals, a processor coupled to the transceiver, a location identifying...
6025801 Video game with local updates mitigates latency effects in wide area network  
Multiple users share a virtual environment through an interactive software application. State changes of a specific user are transmitted to one or more other users dependent on respective relative...
6025800 Interferomeric synthetic aperture radar altimeter  
Aircraft position determination system includes a transmitter to transmit a signal, and two receivers to receive the transmitted signal reflected from the terrain below the aircraft, and a phase...
6025799 Short range position locating system for transponder  
In order to locate a transponder in a roadway there are first and second antenna arrays at spaced locations. Each array is associated with a switching control which causes the array beam to step...
Matches 351 - 400 out of 789 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >