Zero phase real time filtering with a recurrence matrix
First Claim
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1. A method of processing a first signal, the method comprising using a processor to:
- identify a past recurring pattern in the first signal with a recurrence matrix;
attach the recurring pattern to a front of the first signal to produce a second signal; and
perform zero-phase filtering on the second signal, including applying a filter to the second signal to perform filtering in forward and reverse directions, and combining results of the forward and reverse filtering to produce an output signal in real time with zero phase lag.
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Abstract
Processing of a signal includes identifying a past recurring pattern in the signal with a recurrence matrix, and filtering the signal and the recurring pattern such that the recurring pattern serves as a representation of future signal behavior.
7 Citations
24 Claims
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1. A method of processing a first signal, the method comprising using a processor to:
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identify a past recurring pattern in the first signal with a recurrence matrix; attach the recurring pattern to a front of the first signal to produce a second signal; and perform zero-phase filtering on the second signal, including applying a filter to the second signal to perform filtering in forward and reverse directions, and combining results of the forward and reverse filtering to produce an output signal in real time with zero phase lag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus comprising a pre-processing component for de-trending an input signal;
- and a filtering component for generating a recurrence matrix from the de-trended signal, identifying a past recurring pattern using the recurrence matrix, and filtering the de-trended signal and the recurring pattern such that the recurring pattern serves as a future extension of the de-trended signal.
- View Dependent Claims (11, 12, 13, 14, 15)
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16. A flight control system comprising:
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a flight control computer with control laws; sensors configured to capture sensory signals; and a filtering module for filtering the sensory signals in real time with zero phase lag, the flight control computer acting upon the filtered sensory signals, wherein the filtering of a sensory signal includes identifying a past recurring pattern in the sensory signal with a recurrence matrix; and
filtering the sensory signal and the recurring pattern such that the recurring pattern serves as a representation of future signal behavior. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification