Non Linear Inversion of Underdetermined Mixtures
نویسندگان
چکیده
Static linear mixtures with fewer sensors than sources are considered They are encountered for instance in downlink radio communications if the spectral e ciency is attempted to be improved The blind source extraction problem is addressed by forming virtual sen sor measurements in order to make it possible to invert linearly the observation model Virtual measurements are a non linear function of actual measurements and the choice of this non linearity depends on the source distribution assumed to be known and discrete Two numerical algorithms are proposed depending on the fact that the mixture is known or beforehand identi ed or not Computer results are run with both BPSK and MSK sources and compared to the ultimate sepa ration performances ICA IEEE Workshop on Indep Comp Anal and Signal Separation Jan Aussois France pp
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