Patent ID: 8295409

Claim:
A multi-sensor non-cooperative demodulation article of manufacture, comprising: a means for collecting signals and storing data receives a plurality of non-cooperative signals, s(t), from an unknown transmission source, said signal collecting means having a plurality of sensors, each of said sensors having a sampling clock and a local memory, and provides a plurality of received signals, said plurality of non-cooperative signals having a plurality of weak signals, a given modulation and a given demodulation; means for transmitting said plurality of received signals to a master sensor; a first one of said plurality of sensors having means for digitizing said plurality of received signals to provide a plurality of digitized signals to a signal fusion sensor; a means for data processing having a plurality of software programs and a storage medium encoded with machine-readable computer program code; a means for coarse estimation provides a coarse signal-to-noise ratio (SNR) estimation to extract said plurality of weak signals based on a coarse SNR threshold; a means for sorting sorts said plurality of digitized signals from high to low, and signals with a SNR below a given threshold are excluded; a means for normalization normalizes a plurality of digitized signals with an SNR above said given threshold to provide a plurality of digitized signals of high SNR above a given threshold to a means for signal labeling; said signal labeling means labels said plurality of digitized signals of high SNR above a given threshold from 1 to Nn based on a plurality of estimated SNR values; a means for correlating selects a maximum SNR, r 1 (k), from said plurality of high SNR above a given threshold digitized signals and correlates said maximum SNR with r 2 (k) from said plurality of high SNR above a given threshold digitized signals to obtain a delay factor; a means for calculating averages said r 1 (k) and in a continuous looping process; a means for generating and transmitting a combined digitized signal with said maximum SNR, r 1 (k), is generates and transmits said combined digitized signal to a means for automatic modulation for a modulation output estimate; said modulation output estimate is sent to a means for modulation scheme classification that selects a demodulation technique by evaluating said modulation output estimate and said given demodulation; a matching demodulation output is generated in said modulation scheme classification means; said matching demodulation output is sent to a means for signal demodulation to generate a demodulated signal; and said plurality of non-cooperative signals are simulated 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.