| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 342156000 | Interferometer | 13 |
| 20090207071 | Radar device and target angle detection method - A radar device has a plurality of receiving antennas which receive, as a reception wave, a radar wave sent in a predetermined reference direction and reflected by a target; a phase difference detection unit which detects a first phase difference of the reception wave received by a first receiving antenna pair that is spaced by a first gap, and a second phase difference of the reception wave received by a second receiving antenna pair that is spaced by a second gap smaller than the first gap; and an angle detection unit which performs a first process of determining, as a detection angle, an angle of the target relative to the reference direction being a mutually coincident angle from among a plurality of first angles corresponding to the first phase difference and a plurality of second angles corresponding to the second phase difference. The radar device allows expanding an angle detection range without reducing the resolution of the angle corresponding to the second phase difference. | 08-20-2009 |
| 20100019955 | Method and Apparatus for Location Determination Using Reflected Interferometry | 01-28-2010 |
| 20100134344 | RADAR DEVICE AND AZIMUTH ANGLE DETECTION METHOD - An electronic scanning radar device that detects an azimuth angle of a target based on a phase difference between a first pair of received waves received by a first pair of antennas separated by a prescribed distance, and combines the first pair of received waves and generates a first composite wave. The composite wave has a steep antenna pattern, for which the amount of level change is large for the amount of change in azimuth angle, and an azimuth angle judgment unit performs true/false judgment in which a detected azimuth angle is judged to be true when the level of the above first composite wave is equal to or above a reference value, and the azimuth angle is judged to be false when the level is below the reference value. | 06-03-2010 |
| 20110215963 | COMPACT BEACON RADAR AND FULL ATC SERVICES SYSTEM - A system and method for a single site beacon transceiver including an omni-directional transceiver, a plurality of directional receiving antennas for receiving a signal, and a digital receiver for processing the signal to determine an azimuth to the source of the received signal. The digital receiver includes a plurality of receiver channels that are calibrated periodically and at least one processor that estimates a coarse signal azimuth for the signal by calculating an amplitude monopulse ratio for the signal using the two directional receiving antennas receiving the highest amplitude signal, and estimates a final signal azimuth for the signal using an interferometer baseline between the two directional receiving antennas or, alternately, subtracts the complex ratio of the measurements from the complex ratio of the antenna array RF model to determine the angle corresponding to the minimum of the absolute value of the difference. | 09-08-2011 |
| 20110227783 | DETERMINING AT LEAST ONE COORDINATE OF AN OBJECT USING INTERSECTING SURFACES - In an embodiment, a coordinate determiner is operable to identify at least first and second surfaces that each approximately intersect an object, and to determine at least two approximate coordinates of the object from the first and second surfaces, where at least one of the surfaces is nonplanar. For example, if the coordinate determiner is disposed on a fighter jet having at least to short-baseline-interferometers (SBIs), then two surfaces may be the surfaces of two cones having two of the SBIs as respective vertices, the object may be a close-in target, and the coordinate determiner may determine the azimuth and elevation of the target from the cone surfaces. Furthermore, the coordinate determiner or another computation unit onboard the jet may determine the slant range of the target from the elevation and the altitude of the jet. The coordinate determiner may at least facilitate ranging of the target quickly enough to allow a pilot sufficient time to evade detection by the target, to destroy the target, or to evade or destroy a projectile fired by the target. | 09-22-2011 |
| 20110248881 | Radar with High Angular Accuracy, Notably for the Obstacle Sensing and Avoidance Function - The present invention relates to a radar device with high angular accuracy. The solution provided by the invention simultaneously combines an interferometer that is accurate but, for example, ambiguous when receiving; and a space colouring mode when transmitting. The colouring of the space consists notably in transmitting on N transmitting antennas N orthogonal signals. These signals are then separated by filtering on reception using the orthogonality properties of the transmission signals. It is, for example, possible, with two contiguous antennas in transmission associated with two orthogonal codes to produce a single-pulse type system when transmitting. The invention applies notably to the obstacle sensing and avoidance function, also called “Sense & Avoid”. | 10-13-2011 |
| 20110248882 | METHOD FOR INTERFEROMETRIC RADAR MEASUREMENTS - A method for interferometric radar measurements that provides prearranging, at a target observed by the radar, of a transponder that is adapted to perform a frequency shift f | 10-13-2011 |
| 20110260911 | Systems and methods for resolving interferometric angle-of-arrival ambiguities due to local multipath reflections - Interferometric angle-of-arrival (AOA) ambiguities due to local multipath reflections are resolved by measuring the received phase differences of one or more pairs of antenna elements of the interferometer array, constructing hypotheses from unwrapped phase pairs that correspond to potential AOA solutions, and selecting the hypothesis that most likely represents the true AOA of the signal emitter based on processed unwrapped data that has been corrected through the application of a priori calibration terms selected on the bases of the candidate hypotheses. | 10-27-2011 |
| 20130027242 | DETECTION AND TRACKING RADAR, ANTI HIGH SPEED MOBILE DEFENSE SYSTEM HAVING THE SAME AND HIGH SPEED MOBILE TRACKING METHOD OF DETECTION AND TRACKING RADAR - A detection and tracking radar includes a hazardous zone set within a preset radius based on a main body having a radar, a plurality of detection and tracking sectors configured to detect a high speed mobile approaching the main body within detection areas, the detection areas being defined by diving the hazardous zone based on an azimuth angle, and a controller configured to recognize the high speed mobile as a target based upon signals received from the detection and tracking sectors and track the target. Accordingly, rapid detection and tracking of the high speed mobile can be allowed. Also, since the detection and tracking sectors can be independently run, expansion of a radar system can be free by virtue of addition of the detection and tracking sectors. | 01-31-2013 |
| 20130069819 | THREE DIMENSIONAL RADAR SYSTEM - A system and a method of generating a three-dimensional terrain model using one-dimensional interferometry of a rotating radar unit is provided herein. Height information is evaluated from phase differences between two echoes by applying a Kalman filter in relation to a phase confidence map that is generated from phase forward projections relating to formerly analyzed phase data. The radar system starts from a flat earth model and gathers height information of the actual terrain as the platform approaches it. Height ambiguities are corrected by removing redundant 2π multiples from the unwrapped phase difference between the echoes. | 03-21-2013 |
| 20130229300 | ON-BOARD RADAR APPARATUS, OBJECT DETECTION METHOD, AND OBJECT DETECTION PROGRAM - An on-board radar apparatus includes a plurality of reception antennas that form a reception array antenna that receives a reception wave obtained by causing an object to reflect a transmitted wave, the reception array antenna having two or more average pitches that do not have the relationship of integral multiplication, and an azimuth detecting unit configured to perform an azimuth detection process of detecting an azimuth of the target based on signals received by the respective reception array antennas, and to determine that the detected azimuth of the target is a real azimuth when it is determined that the azimuths of the target detected based on the signals received by the respective reception array antennas coincide with each other and to determine that the detected azimuth of the target is a pseudo azimuth when it is determined that the azimuths of the target detected based on the signals received by the respective reception array antennas do not coincide with each other. | 09-05-2013 |
| 20160097847 | METHOD AND MIMO RADAR DEVICE FOR DETERMINING A POSITION ANGLE OF AN OBJECT - A method and a MIMO radar device are provided for determining a position angle of an object. The method includes the following steps: emitting a first radar signal with the aid of a first transmitting antenna having a first radiation pattern; emitting a second radar signal with the aid of a second transmitting antenna having a second radiation pattern; emitting a third radar signal with the aid of a third transmitting antenna having a third radiation pattern; the first, second, and third radar signal being emitted in various directions; receiving radar signals which are reflected on the object; and determining the position angle of the object based on phase differences and based on amplitude differences, which originate from the emission of the radar signals in the first through third directions, between the received reflected radar signals. | 04-07-2016 |
| 20160131754 | DEVICE FOR DETECTING ELECTROMAGNETIC SIGNALS - A device for detecting electromagnetic signals comprising an array receive antenna having N radiating elements and M receive channels downstream of the receive antenna, M less than N, the pointing directions of the antenna, equal to the radiating elements, obtained by adaptive beamforming and regularly spaced apart, comprises: switching the M receive channels onto the radiating elements in successive sequence cycles, M radiating elements connected to the receive channels with each sequence, the same radiating element, being the reference element, connected to the receive channels for all sequences, one cycle completed when all radiating elements are connected to one of the receive channels; for each sequence, estimating two-by-two spatial correlations of the signal received on the reference channel and the signals received on the other M-1 receive channels, then estimating the spatial power spectral density in N incoming directions based on a coherent sum of N correlation terms obtained. | 05-12-2016 |
