Class / Patent application number | Description | Number of patent applications / Date published |
342422000 | With self-orienting antenna pattern | 10 |
20140218239 | SINGLE-ANTENNA DIRECTION FINDING SYSTEM FOR MULTI-ROTOR PLATFORMS - The single-antenna radio frequency (RF), direction finding (DF) system includes a single-element directional antenna, which is mounted on a multi-rotor UAV (Unmanned Aerial Vehicle) and integrates with a DF algorithm for tracking an RF source in the 2.45 GHz ISM band (or any other frequency band). The algorithm will depend on the rotating nature of the platform to scan the azimuth, as well as several elevation angles with respect to the platform axis of rotation, and thus be able to accurately locate the coordinates of the RF transmitter based on the recorded power levels. The RF source determination step is performed during the search mode of the algorithm. The RF transmitter location is saved, and the UAV takes actions accordingly by commencing movement towards that location in the action mode of the algorithm. After some time, the UAV enters the search mode again in case the RF source has moved. | 08-07-2014 |
20160069979 | APPARATUS AND METHOD FOR FINDING HYBRID DIRECTION USING TWO BASELINES - Disclosed is a hybrid direction detection apparatus and method that may perform a precise direction detection through a one-time rotation of a log period (LP) antenna and a one-time phase difference measurement of a dipole antenna and may remove an ambiguity error of the LP antenna by two dipole antennas spaced apart by a distance of about 0.5λ by finding an approximate direction using the LP antenna that is a directional antenna, by measuring a phase difference between arrival waves using two baselines including two dipole antenna in the corresponding direction, and thereby precisely finding a final direction. | 03-10-2016 |
342423000 | Plural antennas | 5 |
20110227792 | METHOD AND SYSTEM FOR POSITIONING MOBILE UNITS BASED ON ANGLE MEASUREMENTS - A method and system for positioning mobile units using angle measurements taken by neighboring mobile units is disclosed. A selected mobile unit and mobile units in the vicinity of the selected mobile unit are selectively instructed to measure and report information related to the position of the selected mobile unit. The reported information is used to compute a position of the selected mobile unit. | 09-22-2011 |
20110273335 | Method and System for Using a Wireless Local Area Network (WLAN) Phase Shifter for Smart Antenna Beam Steering - Aspects of a method and system for using a wireless local area network (WLAN) phase shifter for smart antenna beam steering are presented. Aspects of the system may enable determination of an angle of arrival (AOA) for signals received at a receiving station in a wireless network. Based on the AOA value, the receiving station may enable orientation of antenna in a smart antenna system. In a switched beam smart antenna system, antenna element(s) may be selected, which are most closely oriented toward the AOA. In an adaptive array smart antenna system, antenna beam may be steered, or reoriented, based on the AOA. | 11-10-2011 |
342424000 | Tracking interferometer | 3 |
20090079634 | METHOD FOR SINGLE SATELLITE GEOLOCATION OF EMITTERS USING AN AMBIGUOUS INTERFEROMETER ARRAY - A method of locating a terrestrial emitter of electromagnetic radiation in the midst of a plurality of emitters in a satellite in orbit about the earth which utilizes a location estimation and location probability determination process with respect to each possible emitter site and its corresponding error region and then using both feedback and feed forward interaction between location and phase ambiguity resolution processes to generate resolved phase from emitter location, update emitter location or some or all of the emitters, and subsequently utilizing the probabilities thus determined to produce a single estimate of the desired emitter's location. | 03-26-2009 |
20130141282 | SYSTEM OF GEOGRAPHICAL LOCATION OF A RADIO SIGNAL TRANSMITTER LOCATED ON THE EARTH'S SURFACE, AND ASSOCIATED METHOD OF DISTRIBUTED INTERFEROMETRY - A system of geographical location of at least one radio signal transmitter located on the Earth's surface including: a set of satellites equipped with receiving antennas adapted for receiving said signals, forming a main extended interferometry device; an intersatellite relative metrology device for determining the relative positions of said satellites to one another, including at least one dedicated sensor for each satellite, and intersatellite communication means; a device for dating said received signals from said determining of the relative positions of said satellites to one another, issued by said intersatellite relative metrology device; a secondary interferometry device including at least one set of at least three antennas of a satellite; a ground base station; a device for transmitting measurements acquired on the satellites to the ground base station; and means of determining an absolute position of at least one of the satellites. | 06-06-2013 |
20130147665 | Sensor Rotation Bias Removal - A method for determining rotation bias in a sensor using a cooperative target that includes receiving, via a processor, sensor data acquired in a field of view of a sensor at a plurality of points in time. The method also includes receiving, via the processor, position data for a cooperative target travelling along a path through the field of view of the sensor at the plurality of points in time. The method also includes determining, via the processor, a rotation bias in the sensor based on a maximum likelihood estimate performed over the path based on the sensor data and the cooperative target position data. | 06-13-2013 |
342427000 | Monopulse or pseuodo monopulse tracking antenna type | 3 |
20090096674 | TECHNIQUE FOR MITIGATING MULTIPATH IMPACTS ON AZIMUTH ACCURACY IN A MONOPULSE INTERROGATOR - A method for mitigating multipath impacts on azimuth accuracy in a monopulse interrogator is accomplished by calculating samples of monopulse ratio for samples of antenna boresight angles based on data received from an interrogation of a target. Samples of traditional target azimuth from the samples of monopulse ratio are calculated. A mean of the samples of traditional target azimuth is calculated. An alternative target azimuth from the samples of monopulse ratio is calculated. Whether a multipath signal exists is determined from observing a standard deviation of the samples of traditional target azimuth, and using the mean of the traditional target azimuth if a multipath signal does not exist and using the alternative target azimuth if a multipath signal does exist. | 04-16-2009 |
20130038487 | APPARATUS FOR DIRECTION FINDING OF WIRELESS SIGNALS - Provided herein is a compact and economical direction finding antenna using a mono-pulse antenna system, where a plurality of antenna elements are disposed in a circular array. The directional antennas may be formed by any type of antenna element, including a patch or reflector. The antenna beams of the directional antenna elements overlap, so that from any azimuthal direction, the point is covered by more than one antenna beam. Signals from each pair of adjacent antenna elements of the circular array are processed in order to determine the angle of arrival of a received signal. | 02-14-2013 |
20150042515 | COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM - A transmission system that can continue communication even if a tracking error exists and to reduce interference on other transponders when transmitting a video and audio between an endstation facility and another endstation facility via a transponder mounted on communications satellite. This transmission system includes a tracking antenna that tracks a transponder, a tracking error calculation circuit that obtains a tracking error in a tracking operation of the tracking antenna, a transmission level control circuit that obtains a transmission level of a signal in response to the tracking error, and a transmitter that transmits the signal at the obtained signal level via the tracking antenna to the transponder of the communication target. | 02-12-2015 |