Detecting and locating RF emissions using subspace techniques to mitigate interference
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsSteven F. Kimball, Cedric L. Logan
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Abstract
Techniques are disclosed that allow for the detection and locating of RF emitters. The technique includes recording emitter signals of interest received from the search area via an antenna array and a phase coherent receiver, wherein all frequency conversions carried out by the phase coherent receiver are performed in a phase coherent fashion across all the channels. The technique further includes identifying subspace of each channel using singular value decomposition (SVD), analyzing the subspace of each channel for the presence of a target signal, and direction finding and/or geolocating the target signal.
Claims20
A system for detecting and locating an RF emitter in a search area, comprising:
- an antenna array having a plurality of antenna elements;
- a phase coherent receiver having a channel for each of the antenna elements, wherein all frequency conversions carried out by the phase coherent receiver are performed in a phase coherent fashion across all the channels;
- a signal record module for recording emitter signals of interest received from the search area via the antenna array and phase coherent receiver;
- a memory for storing data records generated by the signal record module;
- a subspace signal separation module for receiving the data records and identifying subspace of each channel using singular value decomposition (SVD);
- a signal detection module for analyzing the subspace of each channel for the presence of a target signal;
- and
- a locating module for direction finding and/or geolocating the target signal.
A method for detecting and locating an RF emitter in a search area, comprising:
- recording emitter signals of interest received from the search area via an array of antenna elements and a phase coherent receiver having a channel for each of the antenna elements, wherein all frequency conversions carried out by the phase coherent receiver are performed in a phase coherent fashion across all the channels;
- storing data records generated by the recording;
- identifying subspace of each channel using singular value decomposition (SVD);
- analyzing the subspace of each channel for the presence of a target signal;
- and
- direction finding and/or geolocating the target signal.
A non-transitory processor-readable medium encoded with instructions that, when executed by a processor, cause the processor to execute a process for detecting and locating an RF emitter in a search area, the process comprising:
- recording emitter signals of interest received from the search area via an array of antenna elements and a phase coherent receiver having a channel for each of the antenna elements, wherein all frequency conversions carried out by the phase coherent receiver are performed in a phase coherent fashion across all the channels;
- storing data records generated by the recording;
- identifying subspace of each channel using singular value decomposition (SVD);
- analyzing the subspace of each channel for the presence of a target signal;
- and
- direction finding and/or geolocating the target signal.
Dependencies are inferred from the claim text.