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Match Document Document Title
8855922 Managing use of location-identification services  
In general, the subject matter described in this specification can be embodied in methods, systems, and program products for identifying a location of a mobile computing device. A first location...
8566022 Managing use of location-identification services  
In general, the subject matter described in this specification can be embodied in methods, systems, and program products for identifying a location of a mobile computing device. A first location...
8159395 Communication device, communication system, position detection method and program  
There is provided a communication device including: a receiving unit that receives radio signals transmitted from another communication device using a plurality of transmitting antennas by a...
6697630 Automatic location identification system comparing stored field strength data and an actual cellular call's field strength  
An Automatic Location Identification (ALI) system for cellular telephone networks, along with a pseudo Automatic Number Identification (ANI) typically representing a particular face of a cell...
6097338 Instrument landing system glide path transmitter device  
A glide path transmitter for an instrument landing system. The transmitter includes several antenna radiators by way of which high frequency signals containing various low frequency modulated...
5999129 Multiplatform ambiguous phase circle and TDOA protection emitter location  
A method and system for determining the geolocation--i.e., the latitude, longitude, and altitude--of a stationary RF signal emitter from two or more moving observer aircraft. The observers receive...
5280295 Navigation and positioning system and method using uncoordinated beacon signals  
A positioning system uses a multiplicity of commercial broadcast stereo FM radio signal transmitters, at known fixed locations, each of which transmits a beacon signal having a phase that is...
5173710 Navigation and positioning system and method using uncoordinated beacon signals  
A positioning system uses a multiplicity of commercial broadcast stereo FM radio signal transmitters, at known fixed locations, each of which transmits a beacon signal having a phase that is...
4855962 Method and system for locating and correcting the orientation of an autonomous mobile object and a non-autonomous mobile object  
In a method of locating and orienting a first direction linked to the position and to the orientation of an autonomous first mobile object (M), such as a ship towing a marine geophysical...
4797679 Radio direction-finding using time of arrival measurements  
A method and a system for radio direction-finding by measuring the Time of Arrival (ToA) of the leading edge of signals from a distant source at two relatively closely spaced receiving elements....
4739333 Single channel distance measuring receiver system and method  
A distance-measuring receiver and system uses a transmitter which transmits only a single continuous-wave signal. The receiver produces a first component and a second component from the received...
4675684 Distance measuring receiver system and method  
A distance measuring receiver system and method for determining the distance of a receiving station from a transmitting station, which provides the distance information by the reception and...
4672383 Craft guidance system  
A craft guidance system 200 has signal transmission stations AB, CD, AC operable to provide three intersecting hyperbolic lattices 21, 20, 120. One transmission station pair AB provides a moving...
H000292 Apparatus for the detection of angles-of-arrival of radio frequency signals  
Incoming radio frequency signals from one or more remote transmitters, that may be changing or "hopping" in frequency, are received at two closely spaced antennas. A pair of Chirp-Z transform...
4646096 Enhanced global positioning system Delta-Range processing  
A circuit is shown which utilizes signals transmitted from global positioning system satellites to create change in phase signals. The change in phase signals are measured over a predetermined...
4626860 Passive synthetic aperture system for imaging a source of electromagnetic radiation  
A vehicle-mounted passive synthetic aperture system for locating sources of electromagnetic radiation having a given wavelength λ. The system includes first and second receiving antennas, a phase...
4562437 Digital loop filter  
A digital loop filter is used in a phase-tracking circuit which is adaptable to a phase-comparison radio navigation system such as the DECCA (registered trademark) system. The digital loop filter...
4547777 Method of radio-position-finding through determination of phases of electromagnetic waves and receiving device for practicing the method  
A method of radio-position-finding by means of mapped contour lines of iso-phase shift between two radio-frequency waves separated by a low frequency and transmitted by a group of foci stations...
4532637 Differential receiver  
A phase differential determining apparatus generates low frequency output signals from a multiple channel receiver and extracts relative phase angles of the received RF signals therefrom. The same...
4496951 Hyperbolic navigation receiver  
A hyperbolic navigation receiver locates ships, and the like, by phase-locking the output signal of the voltage-controlled oscillator or voltage-controlled phase shifter of respectively provided...
4490722 Radio navigation system  
An improved line-of-position radio navigation system is disclosed wherein a continuous wave signal produced by a local oscillator is transmitted from a fixed station. At a remote mobile station,...
4472720 Area navigational system using geosynchronous satellites  
An area navigational system using geosynchronous satellites is disclosed. The navigational system comprises a master satellite and seven slave satellites uniformly disposed in geosynchronous orbit...
4442432 Electronic navigation method and system  
A method and system for navigation is disclosed comprising a plurality of transmitters, pairs of which are excited from a common frequency source, and a receiver responsive to and deployed within...
4387375 Transmitter for a navigation system  
In navigation transmitters it is important that the phase difference between the carrier waves of a carrier signal and the carrier waves of sideband signals be held at a constant value. To...
4307401 Two-channel receiver-indicator for phase radio systems  
Two of three receivers of a receiver-indicator are tuned to the frequencies of a first guided station and first guiding station, second guided station and second guiding station, respectively, and...
4114155 Position determining apparatus and method  
The position of a receiver responsive to C/A signals derived from multiple, orbiting space crafts is determined to an accuracy of greater than 300 meters. Each of the C/A signals has the same...
4106022 Radio position-determining system  
A relay system for relaying hyperbolic navigation signal information received at a mobile. The mobile has a simple relay transmitter and receives signals which are radiated from different...
4063244 Receiver/timing apparatus for a single frequency, time-shared positioning system  
An improved receiver/timing apparatus is disclosed for use in a single frequency, time-shared, continuous wave, phase-comparison positioning system wherein a trigger signal is transmitted from a...
3983559 Novel structure for radio position fixing using hyperbolic phase measurement  
A radio position-fixing system using hyperbolic phase measurement, includ two transmitting stations which radiate a specific, programmed, sequential and recurrent waveform and a movable receiver...
3968493 Digital phase comparators  
In a phase comparison radio navigation system in which phase-locked signals of the same frequency are radiated in succession from spaced stations and are compared in phase at a receiver, instead...
3967277 Radio navigation system  
A radio navigation system is disclosed which includes a first pair of fixed transmitting stations, a second pair of fixed transmitting stations and a mobile station. The mobile station includes a...
3936827 Secure hyperbolic guidance using noise signals and correlation detection  
A method for use in controlling the flight of an aircraft which includes radiating from two base stations respectively a first noise signal and a second noise signal identical to said first noise...
3936828 VLF navigation system  
A VLF navigation system suitable for highly accurate worldwide aircraft navigation utilizing existing VLF transmitting stations on a "dead reckoning" basis with initial and intermediate fixes. The...
3899740 FM Sidetone phase comparison system  
A phase determining system particularly suitable for accurate phase determination in a multipath signal environment such as a city wherein gross frequency disturbances are present during deep...
3889264 Vehicle locating system utilizing AM broadcasting station carriers  
A vehicle locating system is disclosed which uses the carrier signals of unsynchronized commercial AM broadcasting stations to form hyperbolic isophase grid lines. Each vehicle is equipped with a...
3808597 ISO-PHASE POSITION DETERMINING SYSTEM  
The following specification discloses an iso-phase position determining system for locating the position of a mobile receiver with respect to three transmitters. The center transmitter frequency...
3789408 SYNCHRONOUS SYSTEM  
Means for measuring time or phase differences between incoming segmented signals which includes the generation of a segmented reference signal having the same frequency of the incoming signals. A...
3787844 RADIO NAVIGATION SYSTEM  
An improved iso-phase line-of-position navigation system for determining the position of a mobile station is disclosed which includes first and second transmitting base stations at respectively...
3760270 CIRCUIT ARRANGEMENTS FOR MEASURING THE INSTANTANEOUS PHASE DIFFERENCE BETWEEN TWO SIGNALS  
A circuit arrangement for measuring the phase difference between a received radio signal pulse and a locally-generated reference pulse, particularly for use in a hyperbolic navigation system...
3714650 VEHICLE COMMAND AND CONTROL SYSTEM  
A dual frequency ranging and communication system for communicating with and locating mobile vehicles in a multipath environment such as an urban center. This system functions in urban areas for...
3689926 RADIO DIRECTION-FINDING METHOD AND A DEVICE FOR IMPLEMENTING SAID METHOD  
A method and apparatus for radio position-finding of the hyperbolic type toetermine the position of a vehicle including intersecting signals of a radio position-finding hyperbole of one family...
3665468 RADIO COMMUNICATION SYSTEM  
A novel radio communication system is disclosed, the system having particular applicability and utility as a radio navigation aid. A transmitting means is utilized which, in the preferred...
3648034 NAVIGATIONAL APPARATUS  
Navigational apparatus for use in a mobile craft comprises measuring means for providing electrical representations of two coordinates of the two position of the mobile craft relative to a...
3618099 MISS DISTANCE DETERMINING HYPERBOLIC SYSTEM  
To determine continuously the minimum distance by which a first moving vehicle will travel past a second moving vehicle, there is transmitted from said second vehicle four frequencies, f 1, f 2, f...
3613095 METHOD OF AND APPARATUS FOR LOCATING A POSITION  
A method of an apparatus for locating a position in which a plurality of frequency standard devices based on the action of the natural frequencies associated with transitions between energy states...
3573829 POSITION DETERMINING MOVING HYPERBOLIC SYSTEM  
In order to determine relative position, three spaced antennas AT1, TT2, AT3, are coupled to a transmitter and respectively radiate f1, f2, and f3 to provide two sets of moving hyperbolic...
3535789 CHART POSITION INDICATING APPARATUS  
1,162,316. Indicating apparatus. DECCA Ltd. March 28, 1968 [July 11, 1967], No.31899/67. Heading G1J. Chart position indicating apparatus for use with a radio navigation system adapted to provide,...
3536901 NAVIGATIONAL COMPUTING APPARATUS  
Improvements in navigation computers, characterized by being prepared for use with a hyperbolic navigation system equipped with a master station and two or more corrected stations and for...
3445845 PHASE COMPARISON RADIO RECEIVER  
1,183,480. Radio navigation. RYAN AERONAUTICAL CO. 28 Sept., 1967 [9 Aug., 1967], No. 44237/67. Heading H4D. Specification describes a hyperbolic navigation receiver of the OMEGA type. Four...
3440535 PHASE LOCKED LOOP SERVO SYSTEM FOR DIRECT MEASUREMENT OF RELATIVE PHASE  

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