Patent ID: 8392149
Filing Date: 2013-03-05
Classification: G01S,G06K

Abstract:
1. A apparatus configured to detect the presence of one or more unknown signals in the presence of noise and/or interference comprising: an input configured to receive input data from a sensor; a bandpass filter configured to filter the input data in a predetermined band; a square law unit configured to square the magnitude of the bandpass filtered input data; an integrator configured to integrate the power of the input data over a period of time, wherein the integrator integrates the power of the input data after it has been filtered and squared; a mean estimator configured to estimate the mean of the power integrated input data over a number of integration periods; a threshold calculator configured to calculate a calculated threshold based on the estimated mean; and a comparator configured to compare the integrated power to the calculated threshold to determine if the input data contains at least one signal, or if the input data contains noise only.