Patent ID: 8548067

Claim:
A system for detecting and identifying non-persistent signals in an observed frequency band in a packet-based radio network having multiple active sources comprising: a radio frequency device for receiving an RF signal and implementing steps of a method of analysis including: performing a second order statistical analysis of said RF signal to determine a plurality of time segments within an observation interval having one or more active sources transmitting, wherein the statistical analysis comprises determining at least a local maximum by repeatedly applying a temporal algorithm to the RF signal starting from random initial points until the algorithm converges monotonically on the local maximum; for each of the plurality of time segments, performing a fourth order statistical analysis of said RF signal to identify two-dimensional slices representing individual active sources within said time segments; and arranging the two-dimensional slices into a three-way array, wherein low rank decomposition of the three-way array provides for recovery of spectra and associated activity sequences of individual components in the RF signal.