Patent ID: 9054901
Filing Date: 2015-06-09
Classification: H04L,H04W

Abstract:
1. A method for detecting a presence of an RF signal, comprising: receiving a sample of an RF frequency channel output from a radio receiver; forming with at least one computer processor a sample correlation matrix A from said sample of said radio frequency channel; calculating with said at least one computer processor a trace tr(A) of the sample correlation matrix; calculating with said at least one computer processor a determinant det(A) of the sample correlation matrix; and performing at least one calculation with said at least one computer processor to selectively determine a presence or absence of a signal on said radio frequency channel, where said trace and said determinant both define terms of a single mathematical equation used during said performing, said single mathematical equation comprising a minuend at least partially defined by said determinant and a subtrahend at least partially defined by said trace.