Patent ID: 6690746
Filing Date: 2004-02-10
Classification: G06K,H04L

Abstract:
A computer-implemented signal recognizer for classifying noncooperative signals, comprising:an up/down detector for detecting the presence of a noncooperative signal of interest; a signal classifier having a number of classifier modules, each module associated with a different signal modulation type and each module operable to perform the following tasks: to receive said signal of interest in digital form, to estimate at least one parameter of said signal of interest, to demodulate said signal of interest based on the estimated parameter, to determine a candidate signal type having the estimated parameter, and to calculate confidence data representing the extent to which said signal of interest is likely of said candidate signal type versus not of that signal type; and a confidence analyzer for receiving said confidence data from each said module and for determining a best signal type from the candidate signal types determined by said modules.