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AssigneeHarris Corporation
InventorsEdward R. Beadle, John F. Dishman, Richard H. Anderson, Paul D. Anderson, Gayle Patrick Martin
Estimating the term…
A transmitted signal's higher order statistics of temporally dependent waveforms are exploited to geolocate low power signals. The geolocation is independent of the characteristics or encoded data of the transmitted waveform. The method uses spatial fourth order cumulants or spatial second order moments in a Blind Source Separation and generalized eigenvalue decomposition to determine unique matrix pencil eigenvalues and eigenvectors. The eigenvectors provide are orthogonal to the steering vector of the transmitted signal save one, which represents the steering vector. This property is used to determine Steering vectors, AoA or geolocation. The receiver includes a multi-element array and does not need a priori knowledge of the transmitted signal source to geolocate the target transmitter. The methods and apparatus for geolocation does not require typical demodulation.
A system for locating a transmitter, where said system is geographically separated from the transmitter, said system comprising:
In a method for locating a transmitter emitting a signal comprised of a plurality of symbols where the emitted signal is received by a receiver including an antenna with a plurality of antenna elements and a digitizer for providing a bit stream from the received symbols, the improvement comprising the step of determining a temporal dependence between bits of the bit stream indexed in time and determining the location of the transmitter from the temporal dependence.
A method for locating an uncooperative transmitter with a receiver including a multi-element array antenna which is geographically spaced apart from said transmitter, wherein said transmitter emits a signal with an unknown waveform, comprising the steps of:
A method of tracking a transmitter emitting a signal with a known unique temporal characteristic, comprising the steps of:
In a method for determining the angle of arrival of a signal received at a receiver having a multi-element antenna array, the improvement comprising the step of determining the angle of arrival based on non-orthogonal eigenvectors selected from a generalized eigenvalue decomposition of a matrix pencil eigenvalue created from a fourth order cumulant of the received signal.
Dependencies are inferred from the claim text.