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| Number | Title | Issue Date |
| 7423589 | Method for localising at least one emitter The invention relates to a method of localization of one or more sources, said source or sources being in motion relative to a network of sensors, the method comprising a step of separation of the sources in order to identify the direction vectors associated with th... | 09/09/2008 |
| 7408509 | Direction finding method and system using probabilistic mapping A Direction Finding Method and System Using Probabilistic Mapping is disclosed. Also disclosed is a preferred system that employs a technique for taking in data sets (lines of bearing) from DF receivers and characterizing those signals with their respective probabil... | 08/05/2008 |
| 7395031 | Mobile device and method for receiving and processing program-accompanying data Mobile device (3) and method for receiving and processing program-accompanying digital data, which are transmitted by a radio transmitter (1), for example a DAB transmitter, and of which at least certain comprise location parameters. The mobile device ... | 07/01/2008 |
| 7310625 | Knowledge network generation A knowledge-based system has one or more repositories with information and knowledge for topics, problems, and solutions to problems. One method to find a solution for a problem by generating a knowledge network in a master knowledge repository includes identifying ... | 12/18/2007 |
| 7245925 | System and method for using location information to execute an action Provided are methods for executing an action in response to a request for a service using location information in conjunction with service-specific parameters. A user may request a provider of a specified service (e.g., taxi, plumber, pharmacist, etc.). In evaluatin... | 07/17/2007 |
| 7242351 | Real-time emitter locating system and method A Real-time Emitter Locating (EL) System and Method is disclosed. The system provides a technique for taking in data sets (lines of bearing) from DF receivers and characterizing those signals with their respective probabilities of error. Then using a unique method, ... | 07/10/2007 |
| 7224978 | Location blocking service from a wireless service provider Location-blocking and identity-blocking services that can be commercially offered by a service promoter, e.g., a cellular service provider or a web advertiser. In the identity-blocking service, the service promoter may disclose the current physical location of a mob... | 05/29/2007 |
| 7181225 | System and method for surveying wireless device users by location The present invention is a system and method for conducting survey using wireless devices. The system architecture of the present invention comprises a location server and a location system. The location server can receive a survey request from a subscriber, delinea... | 02/20/2007 |
| 7130630 | Location query service for wireless networks A location query service for use with a wireless network that tracks the location of network devices, such as a network complying with enhanced 911 standards. The service provides requesters with the locations of network users, based on the locations of the users' w... | 10/31/2006 |
| 7116977 | System and method for using location information to execute an action A system and method is provided for using location information associated with wireless devices. The system includes a wireless device, a location system, and a feature server. The wireless device includes any wireless apparatus having wireless communications capabi... | 10/03/2006 |
| 7110749 | Identity blocking service from a wireless service provider Location-blocking and identity-blocking services that can be commercially offered by a service promoter, e.g., a cellular service provider or a web advertiser. In the identity-blocking service, the service promoter may disclose the current physical location of a mob... | 09/19/2006 |
| 7023391 | Electromagnetic field generation antenna for a transponder An antenna for generating an electromagnetic field including several planar inductive cells parallel connected in an array and forming, in association with at least one capacitor, an oscillating circuit adapted to being excited by a high-frequency signal. ... | 04/04/2006 |
| 6822608 | Method for passive localization of a target and air-air localization in particular This invention concerns a method for passive localization of a target (12) and air-air localization in particular. This method includes a step for acquisition of the signal transmitted by the target using sensors equipping the carrier (11) and f... | 11/23/2004 |
| 6784840 | Method for determining azimuth and elevation angles using a single axis direction finding system A method of determining an azimuth and elevation of a radiation emission source using a single-axis direction finding system is provided. The method includes receiving a plurality of radiation signals at the single-axis direction finding system. The plurality of rad... | 08/31/2004 |
| 6285319 | Method for reducing geometrical dilution of precision in geolocation of emitters using phase circles The present invention determines the geolocation of an emitter, using at least one observer measuring signal change while moving on at least two observation tracks. The measurement of emitter signal change is begun between a first observer position and a ... | 09/04/2001 |
| 6268829 | Doppler direction finder and method of location using doppler direction finder A Doppler Direction Finder comprises at least one antenna (52) spaced from a location point (53). The at least one antenna (52) is arranged in use to be rotated about the rotation point (53). The at least one antenna (52) is arranged to provide a first ou... | 07/31/2001 |
| 5859612 | Method for using an antenna with a rotating beam 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 a plurality of base stations. A signal is transmitted from a rotating antenna. The rotating antenna has a beam which rotates around a cell in the cellular ... | 01/12/1999 |
| 5739789 | Method for position determination Method which involves determining the position of a number of measured objects by determining a number of directions to the measured objects from at least two measuring stations, of which at least one is mobile, the method being used to decide which of th... | 04/14/1998 |
| 5625364 | Apparatus and method for finding a signal emission source An apparatus and method are described for direction finding the source of emf emissions including a monotone signal by detecting the phase changes of the monotone signal during movement relative to the source. A software embodiment measures the amount of ... | 04/29/1997 |
| 5570099 | TDOA/FDOA technique for locating a transmitter A process for locating a transmitter in which the signal is received by first and second receivers and then processed by respective analog to digital converters and filtered to yield first and second digital signals. There is relative motion between at le... | 10/29/1996 |
| 5448248 | Adaptive radio direction finding system RF energy received by an antenna (10) of a radio direction finding system is evaluated for determining the presence of a RF signal transmission source at bearing values at which the received RF energy is statistically strong (33) and which have a relative... | 09/05/1995 |
| 5245348 | Tracking antenna system An antenna is divided into a plurality of sub-arrays which are arranged parallel to each other on a turntable. At least one of the sub-arrays is laterally divided into sub-array sections. Reception signals from these sub-array sections are compared with e... | 09/14/1993 |
| 5218361 | Interferometer ambiguity resolution using missile roll Apparatus and methods of achieving accurate, unambiguous angle information with a minimum number of antenna elements. The present invention resolves the ambiguities inherent in a long baseline phase interferometer by employing a minimum number of antennas... | 06/08/1993 |
| 5134409 | Surveillance sensor which is provided with at least one surveillance radar antenna rotatable about at least one first axis of rotation The invention relates to a surveillance sensor provided with at least one surveillance radar antenna 1 and at least one co-located and co-rotating electro-optical surveillance sensor 5 mechanically connected to said radar antenna. A combined panoramic pic... | 07/28/1992 |
| 5053784 | Apparatus and method for measuring the azimuth and elevation of an object The present invention concerns an apparatus and method for measuring the azimuth and elevation of an object. The apparatus includes a platform; a base plate arranged to the construction of the platform rotatably in a plane, which is essentially horizontal... | 10/01/1991 |
| 4688037 | Electromagnetic communications and switching system An electromagnetic communications and switching system provides for line-of-sight remote selection and actuation of a wide variety of apparatus. The system has a plurality of radiating antennas having independent components defining a reference coordinate... | 08/18/1987 |
| 4438439 | Self-survey means A method and apparatus for a passive station to locate itself relative to a tationary or moving transmitting station transmitting a narrow pulsed scanning beam by utilizing reception of pulses directly from the transmitting station and reception of reflect... | 03/20/1984 |
| 4303922 | Method for reducing errors due to source amplitude modulation in a sequential amplitude comparison direction finding system A technique and apparatus are disclosed which greatly reduce error in sping antenna direction finding systems due to amplitude modulation of the source. A second omnidirectional antenna and its associated receiver are used in two alternative methods to r... | 12/01/1981 |
