Abstract: The present invention discloses a system for determining the position of a GPS terminal. The system comprises a GPS terminal, a location aiding server, and a communications system. Messages are passed between the GPS terminal and the server, as well as within the GPS terminal, to determine the mode of operation of the GPS portion of the system. Decisions are made based on availability of aiding data and Quality of Service requirements.

Abstract: A system for processing electromagnetic waves in a radar system is disclosed. The system includes a transmitter operable to transmit operating waves and calibration waves, one or more receivers operable to receive reflected calibration waves and operating waves, and a system controller operable to process the received calibration waves and operating waves. The system controller may process the received waves by generating a threshold signal based on the calibration waves, and comparing the threshold signal to the operating waves. The system controller may also process operating waves and calibration waves in accordance with one or more signal conditioning algorithms. Additionally, the system controller may display an image representing a target on a display by comparing received operating waves with the generated threshold signal.

Abstract: This invention concerns a system (1) for electronically aligning the polarisation of an antenna (2;2b) with the polarisation of a signal received therein or transmitted therefrom, said signal having two mutually orthogonal components, namely a vertical component (Cv) and a horizontal component (Co).

Abstract: A wide area location and telemetry system may include a wide area location and telemetry system server that is configured to determine wide area location and telemetry system data about an object when the object is located within the coverage area of the wide area location and telemetry system. The wide area location and telemetry system server may also be configured to receive localized location and telemetry system data about the object when the object is located within the coverage area of a localized location and telemetry system. The wide area location and telemetry system may also include a database and a database manager. The database manager may be configured to store the wide area location and telemetry system data and the localized location and telemetry system data in the database.

Abstract: A method and system for selectively disrupting voice modulated radio communications circuits wherein the original communication is recorded, delayed for a selected period then synchronized with a transmitted signal and reinjected into the transmitted signal thereby preventing the intended recipient of the signal from obtaining any intelligence therefrom.

Abstract: A radar/laser emission detector is augmented with a cellular communications capability to provide the capability to share emission detection information amongst drivers to give other drivers even more advanced warning. A network of a plurality of cellular augmented radar/laser emission detector devices may be formed, each having the capability to source the location of radar or laser emission detections to others requesting access to such information, and each being warned when within a proximity of a recent radar or laser emission detection reported by at least one of the plurality of hybrid radar/laser detector devices.

Abstract: According to a method and apparatus taught herein an active object detection system performs reliable object detection based on light pulse emissions and corresponding and time-of-flight based distance determination, while advantageously rejecting clutter. While not limiting, the method and apparatus taught herein may be particularly advantageous for safety-critical object detection applications, such as where the active object detection system, e.g., a laser scanner, monitors for objects of at least a specified size within a predetermined monitoring radius or contour.

Abstract: A system and method for concurrently operating a plurality of agile beam radar modes by pulse-to-pulse interleaving groups of the radar modes. Radar modes are grouped, each radar mode being allocated a certain amount of time for operation and a suitable pulse repetition frequency to improve or optimize the duty cycle of the antenna while concurrently operating the plurality of modes. Priorities may be assigned to groups or to individual radar modes within each group. In some embodiments, TDM communications are further interleaved within the radar modes to enhance the operation of the radar antenna.

Abstract: A structure is described that includes a plurality of columnar pieces of metamaterial, and a plurality of columnar pieces of non-metamaterial. The columnar pieces are arranged in an alternating pattern adjacent one another, and the metamaterial and the non-metamaterial are chosen such that indices of refraction for each are equal in magnitude, but opposite in sign, at a chosen wavelength, such that incident radiation is returned directly towards its source.

Abstract: A method of adjusting a position of an antenna to reduce a position error comprises receiving first data associated with first returns associated with a first portion of an antenna. The method further comprises receiving second data associated with second returns associated with a second portion of the antenna, wherein the first portion is different than, intersects with, or includes the second portion. The method further comprises determining the angle to the terrain using the first and second data, whereby the angle is used to adjust or compensate for the position error of the antenna.

Abstract: The present invention provides a method by which the position of a wireless emitter can be estimated by using a minimum of two wireless transceiver devices. The invention relies on physically moving the wireless transceiver devices to new position locations in order to obtain multiple time difference of arrival measurements. The time difference of arrival measurements can then be combined to derive estimates for the position of the emitter. At least one of the two wireless transceiver devices needs to be mobile with the other one fixed. Using this invention, any proportion of mobile and fixed transceiver devices can be used to derive the position of a wireless emitter. The wireless emitter to be located is not assumed to provide any information about itself to the wireless transceivers used for estimating its position location. The method is referred here as a Mobile-TDOA method or M-TDOA.

Abstract: A beamforming apparatus for a multi-antenna system includes a phase control unit including a plurality of phase shifters which respectively control the phases of signals according to a preset phase weight vector; a signal combination unit combining the signals outputted from the plurality of phase shifters; a frequency down converter down-converting the combined signal outputted from the signal combination unit into a baseband signal; an analog/digital (A/D) converter converting the baseband signal into a digital signal; and a radio frequency (RF) beamforming control unit providing a plurality of preset phase weight vectors to the phase control unit according to a preset application sequence, deciding a maximum signal-to-noise ratio (SNR) among a plurality of SNRs corresponding to the applied phase weight vectors by using the digital signal outputted from the A/D converter, and controlling the beamforming of the phase control unit by using the maximum SNR.

Abstract: There is presented a system and method for providing aircraft runway guidance. One delineated runway alert system for a host aircraft comprises: a processor for executing one or more instructions that implement one or more functions of the runway alert system; a data storage device including geographical runway information; a receiver for obtaining current location data of the host aircraft; an apparatus to provide a current heading of the host aircraft; a data entry device for receiving data indicating a desired runway; memory for storing the one or more instructions for execution by the processor to implement the one or more functions of the runway alert system to: receive the identity of the desired runway; provide an indicia of: the desired runway; and the position of the host aircraft in relation to the desired runway.

Abstract: A running control system having a radar device that detects a distance between a subject vehicle and a preceding vehicle. When a vehicle speed sensor detects the subject vehicle has stopped, a transmission output controller sets a transmission output of the radar device to a stopping time transmission output lower than a running time transmission output. When the radar device detects an increase in the distance between the subject vehicle and the preceding vehicle while the subject vehicle is stopped, or when the distance between the subject vehicle and the preceding vehicle detected by the radar device while the subject vehicle has stopped is longer than a predetermined value, a notifying device notifies an occupant of the subject vehicle that following running control is possible.

Abstract: A positioning method includes: capturing a satellite signal from a positioning satellite; predicting a state vector including a position of a positioning device and a velocity of the positioning device based on the satellite signal; predicting a first distance-equivalent value indicating a distance between the positioning satellite and the positioning device; measuring a second distance-equivalent value indicating a distance between the positioning satellite and the positioning device; calculating an observed value indicating a difference between the first distance-equivalent value and the second distance-equivalent value; setting a measurement error for the positioning satellite based on a signal strength of the satellite signal; changing the measurement error based on a capture data indicating a data of capturing of the satellite signal; and correcting the state vector using the observed value, and the changed measurement error.

Abstract: A positioning method in a positioning device that calculates a location of the positioning device by executing Kalman filtering includes, acquiring a satellite signal from a positioning satellite; predicting a state vector including a velocity component of the positioning device, and error covariance of the state vector; correcting the velocity component using a difference between a measured value and a predicted value of the reception signal frequency from the positioning satellite; determining accuracy of the corrected velocity component based on the error covariance; setting a velocity condition based on the determined accuracy; judging a moving state of the positioning device by comparing the corrected velocity component and the velocity condition; and calculating the location by executing the Kalman filtering with a filter characteristic changed according to the judged moving state.

Abstract: The present subject matter include methods and apparatus for creating three dimensional digitized models of at least one ear impression, the apparatus comprising a frame, a linear axis mounted to the frame, the linear axis having an axis of motion, a first spindle axis mounted to the frame, the spindle axis having an axis of rotation, wherein the axis of rotation of the first spindle axis is parallel to the axis of motion of the linear axis, a first scanner mounted to the linear axis, the scanner includes a laser for projecting a narrowly localized spot of laser light at a target mounted on the first spindle axis and a sensor array for receiving at least a portion of the laser light reflected from the target and a controller configured to communicate with the first scanner.

Abstract: Estimation calculations for calculating an estimated present position are performed twice corresponding to each satellite set. The estimated present position calculated by the second estimation calculations is determined to be a present position candidate corresponding to the target satellite set. In the first estimation calculations corresponding to the first satellite set, the calculated satellite position and estimated pseudo-range of each GPS satellite are stored in caches. In the second estimation calculations, the satellite position of each GPS satellite is read from the cache. In the first estimation calculations corresponding to the second or subsequent satellite set, the satellite position and the estimated pseudo-range of each GPS satellite are read from the caches, and the satellite position and the estimated pseudo-range of the GPS satellite of which the satellite position and the estimated pseudo-range have not been stored in the caches are calculated and stored in the caches.

Abstract: A detector apparatus, detection system, and method are provided for determining optimum operational angles based on the statistical correlation of wavelength-specific electromagnetic propagation and surface interaction. These techniques can be used within the radar community in both military and commercial radar applications for airborne radar system users to determine optimum operational depression angles based on the purpose of the effort, the operational frequency, and the terrain-type to be encountered. The method requires the user to interface with a standard computer equipped with the commercially available MATLAB® software package where the operation is presented as a graphic user interface (GUI) that once invoked allows the user to set specific parameters corresponding to the desired terrain type. Upon doing so, the algorithms are exercised and the results are displayed in a series of figures identifying the optimum operational angles.

Abstract: The present invention relates to a method for angular determination and/or for increasing the angular resolution or a detectable angular range when operating antenna groups using the technique of digital beam forming (DBF), as well as a device for carrying out the method. In the method, a measurement signal with a carrier signal and a frequency-modulated signal component are received via at least one antenna group directly or after reflection on one or several objects. The angle, at which the measurement signal is received, is determined by evaluating a phase difference in the received measurement signal which occurs between adjacent antenna elements of the antenna group. The method is characterized in that for determining the phase difference the frequency-modulated signal component is also evaluated, exclusively or additionally to an evaluation of the carrier signal.