Fast Signal Identification Of Bluetooth, Zigbee And Other Network Protocols

A method of determining whether a wireless signal comprises a particular lower-power network protocol, comprising:

• collecting a first plurality of data points, referred to as a window;
• determining whether a lower-power network signal is present in the window based on a frequency value of each data point;
• if so:
• saving the plurality of data points in the window in a buffer;
• incrementing a window counter;
• and
• repeating the collecting and determining steps until the window counter is greater than a predetermined upper limit;
• if not:
• determining if the window counter is greater to a predetermined lower limit;
• and
• if so, executing a second stage;
• and
• if not:
• resetting the window counter;
• clearing the buffer;
• and
• repeating the collecting and
• determining steps;
• and
• wherein the second stage comprises:
• selecting a first group of the plurality of data points from the buffer, referred to as a long window;
• determining whether a lower-power network signal is present in the long window based on the frequency value of each data point;
• if the lower-power network signal is present, performing a timing lock on the data points in the long window to create an optimized data buffer;
• performing a super symbol frequency deviation check on the optimized data buffer;
• optionally performing a Zigbee chip correlation on the optimized data buffer;
• and, based on results of the timing lock, the super symbol frequency deviation check and the Zigbee chip correlation, determining whether the particular lower-power network protocol is present.