A method for separation of the field contributions generated by multiple noncorrelated sources is proposed. The measurements are implemented using one scanning probe and one (or more) stationary reference probe, avoiding the requirement to measure the spatial correlations of the random fields. The contribution of each source can be determined with the assistance of the blind source separation technique. Averaging over realizations allows to cancel the uncorrelated part in the mixed signal measured by the scanning probe. The separated results can be used to localize the emission sources and their contribution to the field pattern. The method was tested on different signals with amplitude and frequency modulation with passive (antenna) and active (IC) sources.