Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8077088 | 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 ... | 12/13/2011 |
| 8063824 | Magnitude-squared coherence filtering in a time difference of arrival (TDOA) or group delay interferometric geolocation system In a geolocation system for determining a geolocation of a target emitter, a method for determining the geolocation. The method comprising: (a) receiving a signal transmitted from the target emitter at each one of a plurality of sensors, a frequency spectrum associa... | 11/22/2011 |
| 7961147 | Long baseline phase interferometer ambiguity resolution using frequency differences A method for determining an angle-of-arrival for a detected signal. The method includes the steps of receiving the signal at a first antenna, receiving the signal at a second antenna, generating a plurality of spectral lines based on a complex multiplication of a co... | 06/14/2011 |
| 7898479 | System and method for signal extraction and angle of arrival determination A method of integrating a detected signal along a given angle of arrival to improve detection. The method includes receiving the signal at a first antenna, receiving the signal at a second antenna, generating a phase difference trajectory based on the signal from th... | 03/01/2011 |
| 7705781 | Histogram for ambiguity visualization and evaluation (HAVE) A method is provided for constructing a histogram to represent the root-mean-squared phase differences for a signal received at pairs of elements in an array. A pair-wise element phase difference (“PEP”) between a signal received at an angle of arrival θ1 ... | 04/27/2010 |
| 7692586 | Sparse interferometric array for radio frequency azimuth direction finding A sparsely populated array of antenna elements on a plane is provided such that the angle of arrival (AoA) measurement for a radiofrequency signal received by the array has high resolution and is non-ambiguous within a 360-degree azimuthal field of view. The array c... | 04/06/2010 |
| 7663548 | Switched combiner GPS receiver system A receiving system includes a combiner configured to receive signals from two or more antenna elements and to generate sum and difference outputs, and a switch configured to sequentially provide the sum and difference outputs as inputs to a receiver. ... | 02/16/2010 |
| 7436359 | 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 ... | 10/14/2008 |
| H2224 | Self-calibrating large baseline interferometer formed from two aircraft A method to passively locate an emitter using two aircraft to form a large baseline interferometer. The basic two element (two aircraft or helicopters) large baseline interferometer includes self-calibration and allows for various configurations for geo-location of ... | 10/07/2008 |
| 7427953 | Wireless communication apparatus for determining direction of arrival information to form a three-dimensional beam used by a transceiver A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays... | 09/23/2008 |
| 7421212 | Detecting and locating pulses using a Bragg cell Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated light beam is proportional to the signal current. The modulated light b... | 09/02/2008 |
| 7380455 | 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... | 06/03/2008 |
| 7362268 | Method for detecting navigation beacon signals using two antennas or equivalent thereof A method for detecting a plurality of navigation beacon signals by using either two antennas or a synthetic aperture antenna for receiving a plurality of distinct measurements, and combining the plurality of distinct measurements using a plurality of antenna weight ... | 04/22/2008 |
| 7358854 | Method and device to identify a periodic light source In a device for location positioning, and more particularly, in a system for identifying an environmental source emitting a base frequency and waveform signal, a sensor (101) records an environmental source (105) emitting a base frequency and waveform ... | 04/15/2008 |
| 7317765 | Signal observation system A system and method to modularize a signal observation process to allow continual adaptation as the independent modules evolve. Receivers, digitizers, storage, and synchronization means form discrete subsystems that can be integrated together yet still be independen... | 01/08/2008 |
| 7315279 | Antenna system for producing variable-size beams An antenna system has multiple antenna feed elements combined in a number of element sets independently controlled to provide a beam of a variable size. Multiple input power dividers are provided for dividing an input signal, and multiple phase controllers are respe... | 01/01/2008 |
| 7304609 | Hybrid wireless ranging system and associated methods A wireless ranging system includes a first wireless unit and a second wireless unit spaced therefrom. The first wireless unit may include a time-of-arrival (TOA) wireless transmitter, and a near-field electromagnetic (NFE) wireless transmitter having a settable oper... | 12/04/2007 |
| 7295150 | Methods and systems for identifying high-quality phase angle measurements in an interferometric radar system A method for determining a mechanical angle to a radar target utilizing a multiple antenna radar altimeter is described. The method comprises receiving radar return signals at the multiple antennas, populating an ambiguity resolution matrix with the electrical phase... | 11/13/2007 |
| 7295154 | Vehicle obstacle warning radar A method for detecting an object using a transmitting antenna and an array of receiving antennas. The method comprises the step of transmitting a signal from the transmitting antenna. The magnitude and phase of a respective received signal at each of the receiving a... | 11/13/2007 |
| 7292182 | Method of calibrating a microwave source The present invention relates to a method for calibrating the phase of a microwave source, in which: a calibration circuit is closed, the calibration circuit comprising an injection channel connected to a measurement channel via the source to be calibrated; a test s... | 11/06/2007 |
| 7292180 | System and method for passively estimating angle and range of a source using signal samples collected simultaneously from a multi-aperture antenna A system and method for passively estimating range and angle of a source are disclosed. The source may be any wave source including radio-frequency (RF), optical, acoustic or seismic sources. In some RF embodiments, the system includes a single aperture antenna to s... | 11/06/2007 |
| 7286085 | Precision geolocation system and method using a long baseline interferometer antenna system A long baseline interferometer antenna system and method for determining the location of an emitter. The long baseline interferometer antenna system comprises a first antenna, a second antenna, an inertial navigation system, an antenna baseline measurement system, a... | 10/23/2007 |
| 7280916 | Method and apparatus for compensating for acceleration errors and inertial navigation system employing the same Provided are a method and apparatus for compensating for an acceleration error in an inertial navigation system (INS). The apparatus includes a motion detector that detects the motion of the INS and outputs information on stationary time intervals during which the I... | 10/09/2007 |
| 7275691 | Artillery fire control system An indirect artillery fire control system is shown, in which a plurality of indirect artillery systems are linked with a fire direction system such that a call for fire order is communicated as a fire command to a selected indirect artillery system, with that system... | 10/02/2007 |
| 7268728 | Moving transmitter correlation interferometer geolocation A Moving Transmitter Correlation Interferometer Geo-Location (MT-CIGL) system is disclosed that permits locating both moving and stationary transmitters from moving DF equipment. A conjugate gradient based search routine is utilized which solves for the location of ... | 09/11/2007 |
| 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 |
| 7242350 | Estimating an angle-of-arrival of a signal by determining polarization Estimating an angle-of-arrival of a signal includes receiving a signal sent from an emitter. The signal is received at a singly polarized antenna system associated with an antenna response model. An autocorrelation matrix having noise-related eigenvectors is generat... | 07/10/2007 |
| 7233285 | Correlation interferometer geolocation Correlation Interferometer Geo Location (CIGL) uses DF antenna array movement on an aircraft while taking a Plurality of sets of transmitted signal Measurements. Each measurement set is stored as data in a covariance matrix, and the matrices are each decomposed to y... | 06/19/2007 |
| 7231197 | Angle rate interferometer and passive ranger A receiver includes a processor and an RF bridge. The RF bridge is coupled to the processor to receive a reference signal from the processor. The RF bridge includes first and second frequency converters coupled to respective first and second antennas. The RF bridge ... | 06/12/2007 |
| 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 |
| 7202813 | GPS reference system providing a synthetic offset vector for dithering a rover station position A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 04/10/2007 |
| 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 |
| 7196656 | Apparatus for estimating direction of arrival of signal An apparatus for estimating direction of arrival of signal is provided that has excellent performance in terms of angular resolution and the number of signals that can be identified. In an array sensor comprising a plurality of sensor elements, the two outermost sen... | 03/27/2007 |
| 7196657 | Radar system using RF noise A radar system that utilizes predetermined, pseudorandom, or random waveforms that may be substantially matched to the impulse response of the radar and any surrounding clutter such that the signal-to-clutter ratio may be optimized and/or such that specific targets ... | 03/27/2007 |
| 7154934 | Robust, low complexity communications system with interference mitigation A system for short range communications includes a transmitter capable of transmitting a colored noise-like preamble. A receiver receives the colored noise-like preamble and the receiver includes an antenna with an antenna pattern. A direction of the antenna is cont... | 12/26/2006 |
| 7109918 | Nonlinear beam forming and beam shaping aperture system This invention exploits the synchronization properties of coupled, nonlinear oscillators arrays to perform power combining, beam steering, and beam shaping. This architecture utilizes interactions between nonlinear active elements to generate beam patterns. A nonlin... | 09/19/2006 |
| 7099696 | Angle diversity dual antenna system An angle diversity antenna system utilizes a first antenna, a second antenna, and a panel combiner coupled to the first and second antenna. In a transmit mode, the first and second antenna are coupled to a transmit sum channel of the panel combiner. In a receive mod... | 08/29/2006 |
| 7069111 | Method and system for controlling a robot A system and method are described that use impulse radio technology to enhance the capabilities of a robot. In one embodiment, a system, a robot and a method are provided that use the communication capabilities of impulse radio technology to help a control station b... | 06/27/2006 |
| 7065459 | Interrogation method for passive sensor monitoring system A method of determining the frequency of a plurality of resonant devices (for example three SAW devices) includes determining optimal interrogation frequencies for each of the devices, the optimal interrogation frequencies having maximum power spectral densities, ac... | 06/20/2006 |
| 7042393 | Thinned array antenna system An antenna comprised of a plurality of identical subarrays each having N antenna elements. The antenna elements of a core of subarrays all contribute outputs which are used for forming sum and difference beams. A peripheral area surrounding the core has subarrays wh... | 05/09/2006 |
