Patent ID: 8170515

Claim:
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.