Class 342/56 - With direction finding

Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter including a device used to determine the
No. of patents: 28
Last issue date: 07/08/2008

Number	Title	Issue Date
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
7292179	Instantaneous passive range finding A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two points on the platform in a common time sample; detecting the received...	11/06/2007
7224308	Identification and location system for personnel and vehicles A surveillance system is provided for surveillance of objects within a secure area. A surveillance sensor transmits surveillance signals to all objects within the secure area, the reflections of which are received back by the surveillance sensor to determine the loc...	05/29/2007
7072379	Transmission circuit This transmission circuit is used in, for example, a base station in CDMA mobile communication. The transmission circuit has a first delay circuit section which gives a delay to an input signal (spread signal) with a predetermined resolution, and a second delay circ...	07/04/2006
6861970	Wearable vibrating radar detection device A detection device is described configured for receiving radar and laser signals. The detection device is a self contained stand alone assembly having a watch like configuration and positionable on an arm of a vehicular driver such as a motorcyclist. The detection d...	03/01/2005
6816106	Identification and location system for personnel and vehicles An identification interrogator is provided for surveillance of objects within an area. The identification interrogator transmits interrogation signals to all objects within the surveillance area, the reflections of which are received back by the interrogator to dete...	11/09/2004
6744397	Systems and methods for target location A method of determining a target location from a vehicle is described. The method includes identifying the target utilizing a video system, determining an angular location vector to the target with respect to the vehicle, determining a position of the vehicle utiliz...	06/01/2004
6667709	Method and apparatus for detecting leaks in buried pipes by using a selected combination of geophysical instruments A method and apparatus for detecting and locating leaks in buried pipes is disclosed in which ground penetrating radar, induction, acoustic, and vacuum excavation systems are selected based on soil conditions and then employed in selected combinations. Th...	12/23/2003
6583750	Wide-band radar detector having electronic compass The present invention relates to a wide-band radar detector with an electronic compass integrated therein. The radar detecting unit includes a horn antenna, a signal processing unit for detecting signals received by the horn antenna, a laser module for re...	06/24/2003
6549762	Method for estimating arrival direction of desired wave A method for estimating an arrival direction of a desired wave in which the arrival direction of the desired wave can be estimated even in case of existence of a multiple reflection wave. An identical signal series is repetitively transmitted two or more ...	04/15/2003
6356230	INTERROGATORS, WIRELESS COMMUNICATION SYSTEMS, METHODS OF OPERATING AN INTERROGATOR, METHODS OF MONITORING MOVEMENT OF A RADIO FREQUENCY IDENTIFICATION DEVICE, METHODS OF MONITORING MOVEMENT OF A REMOTE COMMUNICATION DEVICE AND MOVEMENT MONITORING METHODS Interrogators, wireless communication systems, methods of operating an interrogator, methods of monitoring movement of a radio frequency identification device, methods of monitoring movement of a remote communication device and movement monitoring methods...	03/12/2002
6181272	Data communications network A method (200, 300) and apparatus (100) provides for displaying locally the position and identity of various field operatives or agents who have radio receiver transmitters (20, 30 and 40). A local control station (10) transmits a request for identificati...	01/30/2001
5945947	Synthetic doppler direction finder for use with FSK encoded transmitters A radio direction finder based on the simulated Doppler frequency shift principle is disclosed that is applicable to FSK encoded pulsed transmissions. Typical applications include tracking of stolen vehicles or shipped package tracking. During FSK decodin...	08/31/1999
5724047	Phase and time-difference precision direction finding system A precision direction finding system for making precision angle of arrival estimates for a signal received through two antenna elements separated in space. Phase interferometry is used to determine a precise angle of arrival, with multiple ambiguities due...	03/03/1998
5629704	Target position detecting apparatus and method utilizing radar In a radar target position detecting apparatus, beams (, for example, light beams) irradiated from a transmitter(, for example, LED) have a predetermined divergence angle, a plurality of light (beam) receiving elements such as photodiode arrays each havin...	05/13/1997
5606325	Detection object searching device The invention provides a detection object searching device which makes it possible to immediately know the direction of a mobile detection object such as a car by information presented on a display of a portable unit. The detection object searching device...	02/25/1997
5579009	Sensor system A sensor system comprises a plurality of sensor stations of the same type for surveillance of an area intended to include an object to be protected, the sensor stations being distributed essentially along the periphery of a circle, in the central part of ...	11/26/1996
5512909	Method and device for determination of direction A method for determining the direction to a signal source by cooperation between a first device which determines the direction to the signal source with a low angular accuracy and a second device which determines the direction to the signal source with a ...	04/30/1996
5430448	Object detection system A detection system will detect and identify self-propelled objects, such as missiles, which create a hot exhaust plume. The exhaust plume has radiation which flickers with a frequency range of interest. This frequency range can be detected with various de...	07/04/1995
5412390	Apparatus and method for reducing co-channel interference from a radio frequency signal A system for reducing co-channel interference includes a power spectrum analyzer which provides a spectral signal representative of an intermediate frequency signal from the receiver of a direction finding system. The system further includes threshold/win...	05/02/1995
5365238	Precision time measurements A circuit arrangement that utilizes digital data representative of the amplitude of an RF pulse envelope is disclosed. The circuit arrangement comprises a PROM having prestored and addressable routines and a nine stage sequentially arranged eight (8) bit ...	11/15/1994
5077557	Surveying instrument with receiver for satellite position-measuring system and method of operation A surveying instrument for satellite position-measuring includes, a range finder (2), which is preferably non-contact-measuring and tiltable, combined with a satellite receiver (1) in a geometrically unambiguously defined relative position. These two inst...	12/31/1991
4891648	Aircraft radar arrangement In an aircraft on-board radar arrangement including a search radar and a radar warning receiving system, an additional receiving branch is provided to which are fed foreign radar signals received by the sharply focused transmit/receive antenna of the sear...	01/02/1990
4680587	Instrument landing system In a single-frequency precision guidance landing system, the use of a DME interrogator in the aircraft and a DME receiver at the ground installation, each tuned to the same DME channel frequency, to uniquely interrogate a selected ground station and hence...	07/14/1987
4611209	Navigation warning system and method A navigation warning system and method for vessels includes one more earth satellites which electro-optically scan whole bodies of water whose signals are analyzed by a computer either on a satellite or at a ground location. The analyzing computer include...	09/09/1986
4418349	Airport surveillance system Located adjacent to runways, taxiways, and approach ramps are secondary radar interrogators which radiate the P1 and P3 pulses and the P2 pulse via different directional patterns into sectors to be monitored which are individually assigned to each interro...	11/29/1983
4193073	Method and apparatus for position determination An electronic ranging method and apparatus for determining and optionally displaying in real time the location (or relative position) of as many as one thousand geographically-separated stations or "users" within an operational zone by means of slant rang...	03/11/1980
4126859	Ground station for a round-trip-path distance-measuring system This DME ground station permits the distance from the touchdown point (where no transponder can be installed) to be measured on the aircraft without any change in the airborne equipment. The time difference between the reception of an interrogating signal...	11/21/1978

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Class 342/56 - With direction finding