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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 8111192 | Beam former using phase difference enhancement Noise discrimination in signals from a plurality of sensors is conducted by enhancing the phase difference in the signals such that off-axis pick-up is suppressed while on-axis pick-up is enhanced. Alternatively, attenuation/expansion are applied to the signals in a... | 02/07/2012 |
| 8077089 | Precision geolocation of moving or fixed transmitters using multiple observers A method of geolocating a stationary transmitter observed by a fixed receiver device and at least two receiver devices, at least one of the receiver devices moving includes obtaining wavelength-scaled phase difference measurements between pairs of receiver devices, ... | 12/13/2011 |
| 8040280 | Apparatus and method for computing location of a moving beacon using received signal strength and multi-frequencies Provided is an apparatus and method for computing the location of a radio beacon by using received signal strength (RSS) and multiple frequencies. The apparatus and method of the present invention computes the location of a radio beacon without limitation in distanc... | 10/18/2011 |
| 8022873 | Methods and system for determining angles of sight between two devices A method of determining angles of sight between a receiver device having at least two reception antennas and at least one transmitter device having at least one transmission antenna for the transmission of radioelectric signals including at least two wavelengths. Th... | 09/20/2011 |
| 7932860 | Determining a position of a tag A tag transmits signals having at least two different frequency components. The signals are receivable by at least some of a plurality of spaced receivers. Each receiver, in response to receiving a signal, measures respective phases of the first and second frequency... | 04/26/2011 |
| 7924221 | Method and apparatus for monitoring the integrity of satellite navigation signals A method for monitoring the integrity of satellite navigation system includes a first detection of integrity problems, in which the same entity of a navigation signal from a particular satellite is received at different sites, and evaluated to estimate the error of ... | 04/12/2011 |
| 7825858 | Methods and systems for frequency independent bearing detection A system and method are provided for estimating bearing of a target based on RF signals received by an array of antenna elements. The system comprises first and second input channels that are configured to receive analog signals that correspond to first and second a... | 11/02/2010 |
| 7619563 | Beam former using phase difference enhancement Noise discrimination in signals from a plurality of sensors is conducted by enhancing the phase difference in the signals such that off-axis pick-up is suppressed while on-axis pick-up is enhanced. Alternatively, attenuation/expansion are applied to the signals in a... | 11/17/2009 |
| 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 |
| 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 |
| 7414576 | Precision RF antenna pointing A precision antenna pointing system and methods are disclosed. Antenna pointing error is determined by detecting RF signal phases at locations along the edge of an antenna reflector. A set of signal phase reference harnesses are used to compensate for harness induce... | 08/19/2008 |
| 7414580 | Method and corresponding device for joint signal detection and direction of arrival estimation A method and corresponding device for joint signal detection and direction of arrival estimation, based on the ability to identify both the existence and direction of arrival of a required signal featuring known characteristics, before it is forwarded to a modem. Op... | 08/19/2008 |
| 7403157 | Radio ranging using sequential time-difference-of-arrival estimation A method determines a position of a target object. A window function is applied repeatedly to a first signal and a second signal of a pair of radio signals received at a pair of passive sensors from a target object while time shifting the window function during a co... | 07/22/2008 |
| 7397427 | Phase event detection and direction of arrival estimation In one embodiment, a system includes at least two detector devices, each detector device for independently detecting a phase event of a composite signal comprising one or more traveling wave signals to provide phase event information. The system further includes a p... | 07/08/2008 |
| 7391368 | Determining the time of arrival of a wireless signal In an example embodiment, a time of arrival circuit coupled to a wireless transceiver configured to determine a time of arrival of a wireless signal. The time of arrival circuit is operative to perform a coarse-scale frequency domain correlation of the actual sample... | 06/24/2008 |
| 7391371 | Radio transceiver and method of controlling direction of radio-wave emission Disclosed is a method of controlling direction of radio-wave emission of a base-station transmitter which emits radio waves upon providing the radio waves with directivity in the direction of a receiver. Two antennas of a base station that are disposed at different ... | 06/24/2008 |
| 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 |
| 7372404 | Apparatus for estimating direction of arrival wave Apparatus and method are disclosed for estimating direction of an arrival wave, such as radio or acoustic waves. A correlation matrix of an arrival wave is computed, and matrices for obtaining eigenvalues and eigenvectors are produced. Column norms of the matrix, wh... | 05/13/2008 |
| 7365682 | System and method for distributed signal compression for cooperative geolocation A cooperative geolocation system and method. The system and method involves time stamping a plurality of received signals and modifying, such as compressing, one or more of the received signals, either with the same or with different rates of compression. A processi... | 04/29/2008 |
| 7359038 | Passive determination of ground target location Ground targets can be passively identified on uneven terrain from an observation point elevation above a known reference point, a line-of-sight inclination angle, an azimuth angle and a digital terrain elevation database wherein actual elevations of surrounding lati... | 04/15/2008 |
| 7358898 | Method for calibrating an AOA location system for all frequencies in a frequency hopping signal A method for calibrating an antenna and signal processing system enabling angle of arrival (AOA) determination for a frequency hopping signal, in which a calibration coefficient is determined in response to one or more calibration signals injected into the system at... | 04/15/2008 |
| 7342536 | System and method for determining the location of emitters having well-behaved timing features A method, system, and computer program product are provided for determining the location of an emitter. A first subset of a plurality of parameters comprising a signal model associated with the emitter is selected. Values are estimated for the selected first subset ... | 03/11/2008 |
| 7342945 | Data time difference absorbing circuit and data receiving method and device A data time difference absorbing circuit comprises a memory (36) in which first digital data containing first time reference code data are stored and from which the first digital data are read, a memory (37) in which second digital data containing seco... | 03/11/2008 |
| 7340375 | Method and apparatus for noise floor estimation A method and device are provided for an improved system and method of estimating the noise floor of a wideband signal without full knowledge of the nature of the narrowband signals contained therein, and provides digital characteristics to allow real-time signal pro... | 03/04/2008 |
| 7340259 | Robust, efficient, localization system Replica correlation processing, and associated representative signal-data reduction and reconstruction techniques, are used to detect signals of interest and obtain robust measures of received-signal parameters, such as time differences of signal arrival and directi... | 03/04/2008 |
| 7319428 | Positioning of mobile wireless terminal A wireless apparatus for determining a phase difference of a received RF signal, and method. The apparatus includes antennas displaced from each other by a predetermined distance for receiving an RF signal. The apparatus also includes an exclusive OR (EXOR) circuit ... | 01/15/2008 |
| 7315280 | Coherent geolocation system A coherent TOA system is provided for rapidly ascertaining the position of a pulse train emitter such as a radar. Techniques are provided to estimate the underlying repetition interval of the emitter and to do the TOA processing knowing which of the particular pulse... | 01/01/2008 |
| 7315276 | Beam compression radar A concept is described for broadening the beam of a phased array radar antenna to provide continuous illumination of all radar targets within the search space, and this beam is compressed upon reception to realize the angular resolution that is possible with the ant... | 01/01/2008 |
| 7304571 | Firefighter locator with activator A device for activating a signal emitter for use in a firefighter locator system operates in conjunction with the firefighter's self-contained breathing apparatus (SCBA). The activation device includes a pressure sensor to monitor pressure on an air line that delive... | 12/04/2007 |
| 7304610 | Positioning of mobile wireless terminal An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a... | 12/04/2007 |
| 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 |
| 7302017 | System and method for adaptive matched filter signal parameter measurement A robust and flexible system for signal parameter measurements in the field of signal processing dynamically uses signal parameters from previous signal detections and parametric priorities to adaptively control and process the signal in an efficient and reliable ma... | 11/27/2007 |
| 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 |
| 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 |
| 7286158 | Method and system for providing integrated remote monitoring services A method and system for providing integrated remote monitoring services includes receiving and storing radio frequency identification (RFID) data from an RFID system at a remote facility of a subscriber. Video data is received from a video system at the facility and... | 10/23/2007 |
| 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 |
| 7272162 | Transmitter and receiver for spread-spectrum communication system, and modulation and demodulation methods thereof A data hopping device is provided with a hopping generation unit and a data selection unit, the hopping pattern generation unit generating a predetermined hopping pattern, and the data selection unit outputs a plurality of subcarrier transmission signals correspondi... | 09/18/2007 |
| 7271764 | Time of arrival estimation mechanism According to one embodiment, a method is disclosed. The method includes receiving data at a first wireless radio device that has been transmitted from the first wireless radio device, receiving time stamp information from a second first wireless radio device and est... | 09/18/2007 |
