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| Number | Title | Issue Date |
| 8059031 | Beam switching antenna system and method and apparatus for controlling the same A beam switching antenna method and apparatus for controlling a beam switching antenna system including an antenna element for forming a beam, at least one conductive reflector for reflecting the beam, and a ground switch for applying a reference voltage to the leas... | 11/15/2011 |
| 8054225 | Method and device for wireless directional beam-forming transmission A method and device for wireless directional beam-forming transmission. The method for wireless directional beam-forming transmission between a first device and a second device comprises conducting one or more omni-directional transmissions between the first device ... | 11/08/2011 |
| 7843388 | Arrival direction estimation apparatus A technology for providing an arrival direction estimation apparatus which can greatly reduce the calculation amount in spectrum calculation and can perform precise direction estimation without setting short frequency division in spectrum calculation is disclosed. A... | 11/30/2010 |
| 7633442 | Satellite communication subscriber device with a smart antenna and associated method A satellite communication subscriber device includes a smart antenna for generating antenna beams for receiving signals from at least one satellite, and a receiver. The receiver includes a quality metric module for calculating a quality metric on the signals receive... | 12/15/2009 |
| 7612715 | Direction finding Direction findings by radio comprises arraigning an array of antennas, to receive signals from emitters, selecting individual antenna signals using a first multipole switch and determining, antenna signal strengths. Individual antenna signals are also selected by mu... | 11/03/2009 |
| 7414582 | Method and apparatus for all-polarization direction finding Embodiments of the present invention provide a method and apparatus for all-polarization direction finding. The method and apparatus generally include acquiring measurements at least partially corresponding to an emitted signal and generated utilizing a blind signal... | 08/19/2008 |
| 7391370 | Method and apparatus for adaptive direction estimation of radio waves In an environment of temporally and spatially uncorrelated white additive noise, the direction estimation apparatus for coherent signals calculates (M−1) instantaneous cross-correlations between some array data, and selecting multiple pairs each of which is consis... | 06/24/2008 |
| 7388499 | Electronic tag authentication device and communication adjustment method with electronic tag The electronic tag authentication device of the present invention authenticates the contents of an electronic tag attached to goods. The electronic tag authentication device comprises an antenna directivity change unit for changing the directivity of an antenna for ... | 06/17/2008 |
| 7382840 | RF signal processing in multi-antenna systems A method for antenna subset selection by joint processing in RF and baseband in a multi-antenna systems. Lt input data streams are generated in a transmitter for either diversity transmission or multiplexing transmission. These streams are modulated to RF... | 06/03/2008 |
| 7365695 | Antenna system An antenna system for sharing of operation employs contiguous transmit frequencies. Transmit frequencies are separated into non-contiguous sub-groups isolated from one another by filters 158(+) and 160(−) associated with positive and negative polaris... | 04/29/2008 |
| 7358862 | Radiosonde system, radiosonde system receiver and signal processing method in a radiosonde receiver This publication discloses a radiosonde system, a radiosonde system receiver and a signal processing method for use in a radiosonde system. The radiosonde system comprises at least one radiosonde (1) with means for acquisition of position and/or weather data ... | 04/15/2008 |
| 7348924 | Method of positioning the antennas of a data transmission system The invention pertains to a method of positioning antennas with sectorization in a data transmission system. The method makes it possible to search, by successive approximations, for the sector of each antenna allowing optimal reception of the information. The searc... | 03/25/2008 |
| 7321332 | Device for measuring angle positions In a device for measuring angular positions by using radar pulses and mutually overlapping beam characteristics of at least two antenna elements, a switchable phase shifter is provided in the signal path of at least one antenna element which is switchable in the tim... | 01/22/2008 |
| 7295825 | Diversity antenna arrangement A diversity antenna arrangement to reduce cost and the number of switching operations between different antennas includes an antenna changeover switch for switching between antennas, and an evaluation circuit for evaluating reception quality of a signal derived from... | 11/13/2007 |
| 7280073 | Method and system for determining direction of transmission using multi-facet antenna A method for determining direction of transmission using an antenna array having a number of panels is disclosed. Each panel is configured to receive signals. According to one aspect of the method, each of the panels is directed to receive signals from a transmittin... | 10/09/2007 |
| 7277053 | Apparatus and methods for detecting and locating signals A discrete three-dimensional receiving element has multiple sensors scattered over its surface to detect and locate a signal. The sensors facing the signal detect the signal, and a boundary line is drawn between the sensor which detect the signal and those which don... | 10/02/2007 |
| 7251457 | Wireless network perimeter security system using overlaying radio frequency signals Methods, apparatuses and systems directed to securing a wireless network environment from eavesdropping and other unauthorized activities. One implementation prevents or disrupts meaningful access to information contained in WLAN RF signals that escape from a given ... | 07/31/2007 |
| 7236745 | Transceiver power detection architecture A detector module is described wherein the detector module includes a housing with a conductive waveguide, a detector, a temperature sensor, and detector circuitry. The waveguide is made of a conductive material and of an appropriate size for a signal of a particula... | 06/26/2007 |
| 7228244 | Method and apparatus for direction-of-arrival tracking and their application to beamforming at base-station A direction tracking method is proposed for quickly tracking directions-of-arrival of radio waves even in an environment where trajectories of the directions-of-arrival intersect. With the tracking method, the state vectors of directions-of-arrival (composed of a di... | 06/05/2007 |
| 7221268 | Method and system for providing an active routing antenna An array antenna is facilitates transmission of data with amongst fixed radio units. The array antenna includes a number of antenna panels arranged in an hexagonal shape, one or more array control elements controlling the antenna panels, and one antenna routing elem... | 05/22/2007 |
| 7213442 | Methods of arranging transducers and transducer arrays having reduced phase ambiguity for determining direction of arrival of received signals Method of arranging transducers, including non-coplanar interferometer antennas on the outer surface of an aircraft, to minimize phase ambiguities when determining the direction of arrival of a signal received by an array of the transducers and emitted by a source r... | 05/08/2007 |
| 7212120 | Work site tracking system and method A system for tracking entities at a work site includes an antenna having a scanned boresight. A controller may be configured to determine a relative angle between a reference associated with the antenna and a source of radiation based on a relationship between bores... | 05/01/2007 |
| 7201054 | System and method for resolving phase ambiguity of a transducer array to determine direction of arrival of received signals System and method for resolving phase ambiguities of various transducer arrays, including non-coplanar interferometer antennas on an aircraft skin, in order to determine the direction of arrival of a signal received by the array and emitted by a source remote from t... | 04/10/2007 |
| 7158814 | Method and system for utilizing smart antennas establishing a backhaul network A method and system for utilizing smart antenna in transmission of messages between nodes are disclosed. A wireless communication system includes a plurality of nodes, and each node is capable of being connected to each other node. At least a portion of the nodes ar... | 01/02/2007 |
| 7132979 | Calibration apparatus for a switchable antenna array, and an associated operating method A calibration device for a switchable antenna array, distinguished by the following improvements provides at least two inputs of two or more available inputs of the beam forming network fed simultaneously and/or jointly and/or in the same phase. The antenna elements... | 11/07/2006 |
| 7120431 | System and method for adjusting antenna radiation in a wireless network A method for adjusting antenna radiation in a wireless network involves varying antenna radiation directions of antennas throughout a defined range. A test receiver measures signal parameters from the antennas at measurement locations as the antenna radiation direct... | 10/10/2006 |
| 7068221 | Technique for direction-of-arrival estimation without eigendecomposition and its application to beamforming at base station An incoming radio wave is received by array antenna elements which constitute an array antenna, and the correlation between the received data of some array antenna elements is calculated to form a correlation matrix which is not affected by the additive noise at eac... | 06/27/2006 |
| 7042394 | Method and system for determining direction of transmission using multi-facet antenna A method for determining direction of transmission using an antenna array having a number of panels is disclosed. Each panel is configured to receive signals. According to one aspect of the method, each of the panels is directed to receive signals from a transmittin... | 05/09/2006 |
| 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 |
| 6992624 | Attitude determination system using null-steered array Apparatus and process for determining the position and heading or attitude of an antenna array are described based on radiating sources, preferably GNSS or other such satellite positioning systems. An optimum satellite is selected and the antenna array is “null st... | 01/31/2006 |
| 6958677 | Object location monitoring system An object location monitoring system includes beacons that are spatially distributed throughout an area to be monitored. The beacons transmit interrogation signals that are received and echoed by transponders that attach to moveable objects. Each beacon retransmits ... | 10/25/2005 |
| 6947749 | Apparatus for increasing cell capacity in mobile communication system using adaptive sectorization and method for controlling the same An apparatus for increasing a cell capacity in a mobile communication system using an adaptive sectorization and a method for controlling the same. The apparatus comprises an adaptive sector unit for converting radio frequency (RF) signals of two forward paths into ... | 09/20/2005 |
| 6794767 | Actuator for release devices of vehicles, preferably motor vehicles An actuator for a release device of a motor vehicle has a control acting on the release device and at least one actuator element sending a signal wireless to the control for triggering a release action of the release device. The actuator element is a momentary-conta... | 09/21/2004 |
| 6618009 | Method and apparatus for locating the source of an unknown signal A method of determining the location of an unknown source 10 transmitting a signal to satellite relays 14 and 16 comprises receiving replicas of the signal from the relays at receivers 18. The receivers 18 also transmit and receive reference signals via r... | 09/09/2003 |
| 6583761 | Method and device for determining a position A system and method is provided for determining the position of a transmitter/receiver device (13) arranged anywhere in a space in relation to at least two transmitter/receiver devices (11, 12) arranged at defined positions in the space with regard to eac... | 06/24/2003 |
| 6559935 | Sensors of relative position and orientation An optical position and orientation determining system determines yaw, pitch, roll, lateral translation and longitudinal translation of a body with respect to a direction and intensity sensing receiver. The system comprises two energy beam emitters, mecha... | 05/06/2003 |
| 6292136 | Multi target tracking initiation with passive angle measurements The present invention is in general related to tracking of multiple targets by means of measurements by various sensors. In particular the invention provides procedures for track initiation during multiple target tracking by means of measurements from pas... | 09/18/2001 |
| 6278406 | Direction finder and device for processing measurement results for the same A direction finder is provided that can measure the incoming angles of plural incoming signals without spatially moving antenna elements and can be used in outdoor mobile communication environments. The direction finder also can shorten the measurement ti... | 08/21/2001 |
| 6222486 | Method for the precise angle determination of targets by means of a multiple-unit radar system In a method for the precise angle determination of targets by means of a multiple unit antenna radar system, individual antenna patterns are generated in separate directions by at least three feeds (F-1, F0, F1) which are spatially offset with respect to ... | 04/24/2001 |
| 6223123 | Method and apparatus for direction finding Two pairs of signals determinative of bearing to a transmitter are developed from two pairs of directional antennas. The signals, converted to digital form, are compared to each other to develop a result signal. The result signal is used to select a prima... | 04/24/2001 |
