USA As Represented by Secretary of the Navy

Mark William Owen

Gregory Knowles Fleizach

Christopher Craig Pelham

Erin L Daly

Everett W Sappenfield

Warran Ho Can

Michael Aaron Slutsky

An RF pulse correlator comprising a track database, an antenna, a receiver, and a processor. The track database is configured to store established tracks of RF emissions. The antenna and receiver are configured to receive RF pulses. The tracker is configured to generate improved geolocation data for every received RF pulse based on kinematics of the received RF pulses. The processor is communicatively coupled to the database, the receiver, and the tracker. The processor is configured to associate each received RF pulse with an existing track in the track database or to create a new track.

Radio frequency signal receiver/identifier leveraging unused pulses

An apparatus and method identify emitters. The apparatus includes a receiver, a parameter estimator, a database, and a correlator. The receiver receives an electromagnetic signal from an emitter and measures actual values of observed parameters of the electromagnetic signal. The parameter estimator surmises surmised values of unobserved parameters from the actual values of the observed parameters. The actual values of the observed parameters and the surmised values of the unobserved parameters characterize the emitter. The database stores one or more entries for each emitter. Each entry specifies an identifier of an emitter and exemplary values of the observed and unobserved parameters. The correlator matches the actual values of the observed parameters and the surmised values of the unobserved parameters with the exemplary values of one of the entries of the emitter from which the receiver receives the electromagnetic signal. The correlator outputs the identifier from this entry in the database.

Emitter identification through unobserved parameters

Methods for characterizing radar can include the steps of receiving a plurality of radar emissions, and determining a plurality of Pulse Repetition Intervals (PRIs) corresponding to the emissions. A plurality of clocks Xcan be calculated using the PRIs. A clock range and a clock interval can be defined for the plurality of calculated clocks Xand a clock X can be estimated, but only for the clocks Xthat are within the defined clock range. Countdowns Ccan be determined using the calculated clock X, and a mode M and crystal b can be calculated based on C. Clock X, countdowns C, mode M and crystal b, when considered together can accurately characterize a specific radar emission (and radar the emission came from). The systems and methods can be accomplished using emissions that are being received in real time using a receiver and emissions data from a database simultaneously.

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San Diego, CA, United States of America

Mark William Owen