Patent Document ID: 20080077355
Application ID: 11533860
Patent Flag: 0

Claim One:
1. A computer-implemented method of detecting an anomaly in a signal, comprising: calculating a first plurality of values based on a set of statistics which model the signal, wherein the first plurality of values is calculated over a first period of time; calculating a second plurality of values based on the set of statistics which model the signal, wherein the second plurality of values is calculated over a second period of time; calculating a third plurality of values, wherein the third plurality of values is calculated using the first plurality of values and the second plurality of values, and wherein the third plurality of values is calculated based on a least an autocorrelation of the signal; calculating a difference between at least one of the third plurality of values and a corresponding long-term value, wherein the long-term value is calculated over a third period of time, and wherein the third period of time is greater than the first and second periods of time; comparing the difference to a threshold wherein the difference exceeding the threshold is indicative of the anomaly in the signal; if the difference exceeds the threshold, performing an action wherein performing the action requires a relative increase in power consumption; and transmitting an alert signal or a portion of the signal indicating when the difference exceeds the threshold.