Method and apparatus for the phased detection of a signal including a frequency deviation detection phase
First Claim
1. A method comprising:
- operating a device capable of receiving wireless communication signals; and
monitoring a selected communication channel with an integrated frequency deviation signal detector to detect whether a wireless communication signal being received over the selected communication channel is a desired communication signal;
wherein the integrated frequency deviation signal detector monitors the selected communication channel by;
calculating the integrated frequency deviation of a received signal;
comparing the integrated frequency deviation against corresponding high and low threshold values; and
determining that the received signal is not a desired communication signal if the integrated frequency deviation fails to fall between the corresponding high and low threshold values;
wherein the device is an implantable medical device, the method further comprising;
performing a plurality of different phases of sniff operations in an implantable medical device for detecting whether a wake-up communication signal is being received by the implantable medical device over a selected communication channel,wherein one of the phases of sniff operations comprises the monitoring the selected communication channel performed by the integrated frequency deviation signal detector, the method further aborting all of the different phases of sniff operations on the selected communication channel if the integrated frequency deviation fails to fall between the corresponding high and low threshold values.
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Accused Products
Abstract
A plurality of phases of sniff operations are performed for detecting wake-up signals being received by an implantable medical device (IMD), including a phase that performs a staged detection of whether the integrated frequency deviation of a received signal is outside of an expected frequency deviation range, where sniff operations are aborted if the integrated frequency deviation of the received signal falls outside of corresponding high and low thresholds in any stage, wherein the difference between the high and low thresholds tightens with each subsequent stage and an average frequency deviation over all completed stages are used in the calculations. One phase of sniff operations includes a dual frequency modulation (FM) detector including a first FM detector that introduces a small delay in a received signal providing an average frequency estimate and a second FM detector having a larger delay that is adjusted based on the estimated average frequency.
57 Citations
15 Claims
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1. A method comprising:
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operating a device capable of receiving wireless communication signals; and monitoring a selected communication channel with an integrated frequency deviation signal detector to detect whether a wireless communication signal being received over the selected communication channel is a desired communication signal; wherein the integrated frequency deviation signal detector monitors the selected communication channel by; calculating the integrated frequency deviation of a received signal; comparing the integrated frequency deviation against corresponding high and low threshold values; and determining that the received signal is not a desired communication signal if the integrated frequency deviation fails to fall between the corresponding high and low threshold values; wherein the device is an implantable medical device, the method further comprising; performing a plurality of different phases of sniff operations in an implantable medical device for detecting whether a wake-up communication signal is being received by the implantable medical device over a selected communication channel, wherein one of the phases of sniff operations comprises the monitoring the selected communication channel performed by the integrated frequency deviation signal detector, the method further aborting all of the different phases of sniff operations on the selected communication channel if the integrated frequency deviation fails to fall between the corresponding high and low threshold values. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A frequency discriminator for discriminating a desired signal from unwanted signals on a communication channel, comprising:
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an integrated frequency deviation signal detector for monitoring a selected communication channel to detect whether a signal being received over the selected communication channel is a desired signal, wherein the integrated frequency deviation signal detector is configured to; calculate the integrated frequency deviation of a received signal; compare the integrated frequency deviation against corresponding high and low threshold values; and determine that the received signal is not a desired signal if the integrated frequency deviation fails to fall between the corresponding high and low threshold values; wherein the frequency discriminator is contained within a wake-up receiver of an implantable medical device, the wake-up receiver including a plurality of signal detectors configured to perform a plurality of different phases of sniff operations in the implantable medical device for detecting whether a wake-up communication signal is being received by the implantable medical device over a selected communication channel, wherein one of the phases of sniff operations is performed by the integrated frequency deviation signal detector that is further configured to abort all of the different phases of sniff operations on the selected communication channel if the integrated frequency deviation fails to fall between the corresponding high and low threshold values. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification