JOINT IDENTIFICATION OF MERGE SIGNALS IN NON-COOPERATIVE DIGITAL TELECOMMUNICATIONS

摘要

A method for real-time blind separation and demodulation of a digital communication signal, called a channel, from a composite signal observation comprising digital communication signals, using a single sensor, wherein the parameters of these channels include modulation type, amplification, phase shift, Time, frequency, and modulation rate, the parameters for these various channels may be different, substantially or completely the same, and pre-processing the sum signal; Estimating a parameter of a channel in a maximum likelihood through an adapted EM algorithm, wherein the log-likelihood conditional expectation value calculation is performed recursively by a particle filtering-smoothing method; Jointly demodulating channels according to a stochastic Viterbi algorithm; And tracking the temporal evolution of each channel parameter.