REAL-TIME PHASE DETECTION OF FREQUENCY BAND
First Claim
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1. A method comprising:
- receiving, with a processor of a medical device, a first signal generated from a second signal;
correlating, with the processor of the medical device, the first signal with a frequency component of a frequency band of the second signal, wherein correlating includes predominantly decreasing weighting of past portions of the first signal, and wherein predominantly decreasing weighting of past portions of the first signal comprises predominantly weighting present and more recent portions of the first signal more heavily than earlier portions of the first signal, and wherein the frequency band includes one or more frequency components;
determining, with the processor of the medical device, a phase of the frequency component based on a filtered signal outputted from the correlation;
determining, with the processor of the medical device, a phase of the frequency band based on the determined phase of the frequency component; and
instructing, with the processor of the medical device, a therapy module to deliver therapy based on the determined phase of the frequency band.
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Abstract
Techniques are described for real-time phase detection. For the phase detection, a signal is correlated with a frequency component of a frequency band whose phase is being detected, and the correlation includes predominantly decreasing weighting of past portions of the signals.
42 Citations
34 Claims
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1. A method comprising:
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receiving, with a processor of a medical device, a first signal generated from a second signal; correlating, with the processor of the medical device, the first signal with a frequency component of a frequency band of the second signal, wherein correlating includes predominantly decreasing weighting of past portions of the first signal, and wherein predominantly decreasing weighting of past portions of the first signal comprises predominantly weighting present and more recent portions of the first signal more heavily than earlier portions of the first signal, and wherein the frequency band includes one or more frequency components; determining, with the processor of the medical device, a phase of the frequency component based on a filtered signal outputted from the correlation; determining, with the processor of the medical device, a phase of the frequency band based on the determined phase of the frequency component; and instructing, with the processor of the medical device, a therapy module to deliver therapy based on the determined phase of the frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A medical device comprising:
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frequency band phase detector comprising; a frequency component phase detector configured to; receive a first signal generated from a second signal; correlate the first signal with a frequency component of a frequency band of the second signal, wherein to correlate, the frequency component phase detector is configured to predominantly decrease weighting of past portions of the first signal, wherein predominantly decreasing weighting of past portions of the first signal comprises predominantly weighting present and more recent portions of the first signal more heavily than earlier portions of the first signal, and wherein the frequency band includes one or more frequency components; and determine a phase of the frequency component based on a filtered signal outputted from the correlation; and an averager configured to determine a phase of the frequency band based on the determined phase of the frequency component; and a therapy module configured to deliver therapy based on the determined phase of the frequency band. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A medical device comprising:
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means for receiving a first signal generated from a second signal; means for correlating the first signal with a frequency component of a frequency band of the second signal, wherein correlating includes predominantly decreasing weighting of past portions of the first signal, and wherein predominantly decreasing weighting of past portions of the first signal comprises predominantly weighting present and more recent portions of the first signal more heavily than earlier portions of the first signal, and wherein the frequency band includes one or more frequency components; means for determining a phase of the frequency component based on a filtered signal outputted from the correlation; means for determining a phase of the frequency band based on the determined phase of the frequency component; and means for delivering therapy based on the determined phase of the frequency band.
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34. A computer-readable storage medium comprising instructions that when executed cause one or more processors of a medical device to:
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receive a first signal generated from a second signal; correlate the first signal with a frequency component of a frequency band of the second signal, wherein correlating includes predominantly decreasing weighting of past portions of the first signal, and wherein predominantly decreasing weighting of past portions of the first signal comprises predominantly weighting present and more recent portions of the first signal more heavily than earlier portions of the first signal, and wherein the frequency band includes one or more frequency components; determine a phase of the frequency component based on a filtered signal outputted from the correlation; determine a phase of the frequency band based on the determined phase of the frequency component; and instruct a therapy module to deliver therapy based on the determined phase of the frequency band.
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Specification