Patent ID: 8085882

Claim:
A multi-sensor non-cooperative demodulation device, comprising: a plurality of sensors receives a plurality of non-cooperative signals, s(t), from an unknown transmission source, each of said sensors having a sampling clock and a local memory, and said plurality of sensors provides a plurality of received signals, one of said plurality of sensors being a signal fusion sensor; said plurality of non-cooperative signals having a plurality of weak signals, a given modulation and a given demodulation; a first one of said plurality of sensors digitizes said plurality of received signals to provide a plurality of digitized signals; said plurality of digitized signals being combined in a signal fusion sensor; said signal fusion sensor extracts said plurality of weak signals from said plurality of digitized signals and generates a combined digitized signal with a maximum signal-to-noise ratio, r 1 (k), to obtain a delay factor {circumflex over (m)} 2 ; said combined digitized signal with a maximum signal-to-noise ratio, r 1 (k), is sent to a means for automatic modulation classification for a modulation output estimate; said automatic modulation classification means sends said modulation output estimate to a means for modulation scheme classification that selects a demodulation technique by evaluating said modulation output estimate and said given demodulation; and said modulation scheme classification means sends a matching demodulation output to a means for signal demodulation to generate a demodulated signal that simulates said plurality of non-cooperative signals without unwanted channel noise, disturbances and interference allowing a user to covertly identify and monitor said unknown transmission source with an improved fidelity and reliability.