Feature recognition system
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsGeorge J. Dusheck, Jr., Phillips B. Scott
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Abstract
An airborne system for automatically and electronically recognizing and dcting the relative presence of invariant features of a transient submarine signal occurring in the presence of signal-like noise. A plurality of comb filters receive MAD signal information in the amplitude-time domain and filter it to provide amplitude-time-frequency domain information. The primary features (positive and negative slopes) of this latter information are then abstracted, the abstracted information being utilized in a signal processor to detect and recognize the relative presence of invariant, submarine recognition features. Upon recognition, a decision thereof is routed to a visual display.
Claims17
A feature recognition system comprising:
- first means for converting signals and signal-like noise in the amplitude-time domain into amplitude-time-frequency domain signals;
- second means receiving said amplitude-time-frequency domain signals for abstracting primary features therefrom and for automatically recognizing the relative presence of invariant recognition features associated with said primary features;
- and
- overload logic means operatively connected to said first means for providing disabling and resetting signals to said second means responsive to an overload condition appearing in said first means and sensed by said overload logic means.
A feature recognition system comprising:
- first means for converting signals and signal-like noise in the amplitude-time domain into amplitude-time-frequency domain signals;
- second means receiving said amplitude-time-frequency domain signals for abstracting primary features therefrom and for automatically recognizing the relative presence of invariant recognition features associated with said primary features;
- pulse generating means;
- and
- timing logic means operatively connected to said pulse generating means for providing control timing signals to said first means and said second means.
A feature recognition system comprising:
- first means for converting signals and signal-like noise in the amplitude-time domain into multiplexed sequentially sampled amplitude-time-frequency domain signals;
- and
- second means receiving said multiplexed sequentially sampled amplitude-time-frequency domain signals including a multiplexed feature abstractor means operatively connected to said first means for abstracting primary features at a controlled rate and said second means further automatically recognizing the relative presence of invariant recognition features associated with said primary features including the positive and negative slopes of said signals in the amplitude-time-frequency domain.
Dependencies are inferred from the claim text.