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| Number | Title | Issue Date |
| 7366492 | Method and system for mobile location detection using handoff information Methods and systems for mobile station location detection. A mobile station measures signal strength of each of a set of signals associated with the mobile station, then determines whether a number of signals in the set is less than a predetermined threshold. Based ... | 04/29/2008 |
| 7330151 | Alignment of an elliptical beam of an antenna A system and methods for aligning an elliptical beam of an antenna to a line-of-sight from the antenna to a remote receiver are disclosed. The methods offset the antenna from an initial pointing direction in an antenna pointing coordinate system. Coordinates of the ... | 02/12/2008 |
| 7274332 | Multiple evaluators for evaluation of a purality of conditions A system and method is disclosed for locating people or objects. In particular, a system and method for locating a wireless mobile station using a plurality of mobile station location estimators is disclosed. The system is useful for 911 emergency calls, tracking, r... | 09/25/2007 |
| 7262729 | Radio detection and ranging intrusion detection system A radar system having a processor, a waveform generator, a plurality of antenna interfaces, a set of first antennas configured to transmit a waveform, and a set of second antennas configured to receive a reflected waveform is disclosed. The waveform generator and an... | 08/28/2007 |
| 7233581 | Digital radio communication system for multi-application A time slot for a connection request sent from a mobile station includes the mobile station ID and the application discrimination word of the object application for which the mobile station requests the connection. By referring to the database, a base station assign... | 06/19/2007 |
| 7193556 | System and method for the measurement of full relative position and orientation of objects A system for measuring a position and orientation of an object in flight relative to a reference coordinate system is provided. The system including: three or more illuminating sources, each disposed in a predefined position, the three or more illuminating sources t... | 03/20/2007 |
| 7107164 | Leading wave position detecting unit, receiver, leading position detecting unit, leading wave position detecting method and leading position detecting method A leading wave position detecting unit and method etc. is provided for detecting the position of the leading wave in a delay profile. Time spaces between sampled values (τ1–τ13) in the delay profile are measured. Among the measured time spa... | 09/12/2006 |
| 7024611 | Method and apparatus for time efficient retransmission using symbol accumulation An efficient retransmission of data using symbol accumulation wherein a first set of data symbols is encoded, producing a first set of encoded symbols and a second set of encoded symbols. The first set of encoded symbols is then transmitted in a first frame. A secon... | 04/04/2006 |
| 6952158 | Pseudolite positioning system and method A system and method for determining the geolocation of autonomous mobile appliances using timing measurements from reference signals to determine position. The system and method allows the use of reference signals from disparate communication and navigation networks... | 10/04/2005 |
| 6952181 | Locating a mobile station using a plurality of wireless networks and applications therefor A location is disclosed for wireless telecommunication infrastructures. The systems output requested locations of hand sets or mobile stations (MS) based on, e.g., AMPS, NAMPS, CDMA or TDMA communication standards. The system determines both local MS locations, and ... | 10/04/2005 |
| 6950661 | Location detection method, location detection apparatus and location detection program A location calculation method for calculating, by using propagation delay time of signals received from wireless transmitters, a location of a reception point of the signals to thereby reduce errors in the distance measurement due to an erroneous detection of a path... | 09/27/2005 |
| 6407702 | Method and system for obtaining direction of an electromagnetic wave A method and a system are disclosed which utilize the polarization properties of electromagnetic fields for a determination of the direction to the source of the electromagnetic radiation. The method and system primarily use a particular antenna device wi... | 06/18/2002 |
| 6271790 | Communication system A communications system in which a communications channel is defined at least in part by an electromagnetic wave having a carrier frequency and an electric field vector, the extremity or terminus of which traces a non-linear periodic path at a rotation fr... | 08/07/2001 |
| 6181288 | Polarization compensating device for antenna within a radome A polarization compensating device useful in correcting radome-induced polarization errors in a linearly polarized antenna in a missile is described.... | 01/30/2001 |
| 6107962 | Method for measuring the ellipse axes, wave direction, and wave propagation mode of an elliptically, circularly, or linearly polarized wave This invention consists of a method for measuring the direction and magnitude of the semi-major and semi-minor axes (13, 14) of the electric ellipse (5) of an incoming wave in a magnetized plasma from the in-phase and quadrature measurements (12) of the e... | 08/22/2000 |
| 5950124 | Cellular communication system with dynamically modified data transmission parameters An apparatus and process for improving the performance of a cellular communication system using direct sequence spread spectrum techniques. The apparatus and process enable dynamic modification of communication system parameters including PN code length, ... | 09/07/1999 |
| 5712641 | Interference cancellation system for global positioning satellite receivers An adaptive polarization cancellation arrangement which nulls out all types of concurrent interference signals received by a Global Positioning System (GPS) receiver from antenna mainlobe and sidelobe situated sources. The orthogonally polarized component... | 01/27/1998 |
| 5614914 | Wireless telephone distribution system with time and space diversity transmission for determining receiver location A wireless communication system combines time and space diversity to reduce fading and simplify receiver design. In particular, a data packet which carries digital telephone traffic, is transmitted at three different times from three different antennas. T... | 03/25/1997 |
| 5280286 | Surveillance and identification system antennas An antenna system (20) in transponder article surveillance and identification system (10) employs a separate interrogating transmitting antenna (31) and interrogating receiving antenna (41) both of which are circularly polarized in opposite hand senses wh... | 01/18/1994 |
| 4264908 | Adaptive polarization separation A broadband adaptively controlled polarization separation network. Two transmitted signals vertically and horizontally polarized are received as elleptically polarized signals. One of the two received elliptically polarized signals is automatically adjust... | 04/28/1981 |
| 4090137 | System for compensating cross-polarized waves to attenuate crosstalk Polarization distortion experienced by cross-polarized waves is corrected to reduce crosstalk by transmission of pilot signals representing each of the cross-polarized waves, reception of the pilot signals and, based upon their vector values, adjustment o... | 05/16/1978 |
