Specific Emitter Identification Using Histogram of Oriented Gradient Features

A specific emitter identification system, comprising:

• a receiver operable to receive a signal from an emitter indicative of a hardware characteristic of the emitter;
• a signal processor communicatively coupled to the receiver and operable to process the signal received from the emitter;
• a scope communicatively coupled to the signal processor and operable to generate a computer-readable representation of the signal processed by the signal processor;
• logic encoded in computer-readable medium and operable when executed to:
• compute a plurality of gradients for each partition of a plurality of partitions of the computer-readable representation, each gradient indicative of at least the angular orientation of a respective portion of the computer-readable representation;
• compute a histogram for each partition by assigning each computed gradient to a bin based at least in part on the magnitude of the computed gradient;
• extract one or more Histogram of Oriented Gradient (HOG) features from a concatenation of the bins of all of the computed histograms;
• compare the one or more HOG features to one or more corresponding HOG features stored on a computer-readable medium;
• and
• determine, based at least in part on the comparison, whether the emitter has a particular identification.

A method for specific emitter identification, comprising:

• receiving a signal indicative of a hardware characteristic of an emitter;
• generating a computer-readable representation of the received signal;
• extracting a plurality of Histograms of Oriented Gradient (HOG) features of the computer-readable representation;
• comparing the one or more HOG features to one or more corresponding HOG features stored on a computer-readable medium;
• and
• determining, based at least in part on the comparison, whether the emitter has a particular identification.