Patent
Angle-of-arrival measurement via spectral estimation of radar time-of-arrival periodicities
TLDR
In this article, a spectral estimation technique was used to estimate the angle-of-arrival (AOA) of radar pulses with respect to a ground or airborne based platform.Abstract:
The method provides the capability to estimate the angle-of-arrival (AOA) of radar pulses with respect to a ground or airborne based platform. It utilizes a spectral estimation technique which extracts the periodic properties of radar signals whose time-of-arrivals (TOAs) have been tagged by an Electronic Warfare receiver. The method can be used in a multiple signal environment and can separate and individually measure AOA of emitters that are spatially very close but have incommensurate Pulse Repetition Intervals (PRIs).read more
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Patent
Method and system for controlling a robot
Susan J. Glenn,Gregory A. Shreve +1 more
TL;DR: In this article, a system, a robot and a method are described that use the communication capabilities of impulse radio technology to help a control station better control the actions of the robot.
Patent
Multi-platform geolocation method and system
TL;DR: In this article, a method for determining the geolocation of an emitter using sensors located at a single or multiple platforms is disclosed, which includes the steps of receiving a first measurement set relative to a first emitter, including angle of arrival, time difference of arrival and/or terrain height/altitude measurements, and determining at least a second location estimate using at least one of a batch least squares analysis and a Kalman filter analysis.
Patent
Impulse radio receiver and method for finding angular offset of an impulse radio transmitter
TL;DR: In this article, a system and method for determining angular offset of an impulse radio transmitter using an impulse receiver coupled to two antennae is presented, where the antennae are separated by some known distance, and, in one embodiment, one antenna is coupled to the radio with cable delay.
Patent
Phase and time-difference precision direction finding system
TL;DR: In this paper, a precision direction finding system for making precision angle of arrival estimates for a signal received through two antenna elements separated in space is presented, with multiple ambiguities due to the periodic nature of the phase difference related to geometric angle.
Patent
Method and apparatus for synchronizing base stations using remote synchronizing stations
TL;DR: In this article, the authors proposed a method and apparatus for determining any offset between the timing of a communication base station and the GPS constellation using a remote synchronization station at which a base station can be measured and compared with known timing to determine an offset.
References
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Patent
Time difference of arrival geolocation method, etc.
TL;DR: In this paper, a cyclic cross-correlation method is used to determine the signal time of arrival difference between two spaced antennas, which can be considered as a cyclostationary process.
Patent
Self-survey means
TL;DR: In this paper, a method and apparatus for a passive station to locate itself relative to atationary or moving transmitting station transmitting a narrow pulsed scanning beam by utilizing reception of pulses directly from the transmitting station and reception of reflected pulses from a set of scatterers is presented.
Patent
Collision avoidance system
TL;DR: In this paper, a position-finding collision avoidance system (CAS) at an own station within the service areas of at least two identified SSRs at known locations derives differential azimuth (A), differential time of arrival (T), identity and altitude data regarding one or more transponder-equipped Other station from standard ATCRBS interrogations and replies.
Patent
Computed-interferometry radar system with coherent integration
TL;DR: In this paper, a beamforming operation is performed on the sample signals by employing coefficients that have been computed from calibration readings taken by the elements mounted on the mobile platform, which are then integrated coherently to produce an output.
Patent
Pulse repetition interval autocorrelator system
TL;DR: In this article, a PRI (pulse repetition interval) autocorrelator is used for recognition of PRIs in a data set composed of time ordered TOA (time of arrival)) words representing the time of reception of a plurality of pulses from a pluralityof emitters.